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ASUS ROG Swift OLED PG27UCDM vs BenQ ZOWIE XL2566X+

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Product A: ASUS

ROG Swift OLED PG27UCDM

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B

Product B: BenQ

ZOWIE XL2566X+

85 of 172 known

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Only differences

AASUS ROG Swift OLED PG27UCDM

BBenQ ZOWIE XL2566X+

General

4 of 8 differ

Series

ROG Swift OLED1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Model heading: ROG Swift OLED PG27UCDM.

XL Series2Owner's manualesupportdownload.benq.com/esupport/ESPORTS%20DISPLAY/UserManual/XL2540X+/UM_EN_250731185408.pdfRead 30 September 2026

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

PG27UCDM, 90LM0B30-B019711Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Model heading establishes PG27UCDM. Part number comes from the separately cited ASUS datasheet.4Maker spec sheet (PDF)gzhls.at/blob/ldb/8/d/d/9/3249322c8dac04e25c37cdf4197f284bead7.pdfRead 5 October 2026ASUS datasheet page 1: product number 90LM0B30-B01971 for ROG Swift PG27UCDM. No sales region inferred from suffix.

XL2566X+, 9H.LMRLB.QBE7Retailer pageamazon.com/dp/B0D3JC9S9MRead 30 September 20268Retailer pageldlc.com/en/product/PB00654876.htmlRead 7 October 2026

GTIN / EAN

47113878152364Maker spec sheet (PDF)gzhls.at/blob/ldb/8/d/d/9/3249322c8dac04e25c37cdf4197f284bead7.pdfRead 5 October 2026ASUS datasheet page 1: EAN 4711387815236 for product number 90LM0B30-B01971.

840046050511, 47187550941947Retailer pageamazon.com/dp/B0D3JC9S9MRead 30 September 2026UPC 840046050511 for model XL2566X+ (US listing)8Retailer pageldlc.com/en/product/PB00654876.htmlRead 7 October 2026EAN 4718755094194 for model 9H.LMRLB.QBE, also in another retailer's product data

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

2 January 20257Press releasepress.asus.com/news/press-releases/asus-rog-swift-oled-pg27ucdm-strix-oled-xg27aqdpg-gaming-monitorsRead 5 October 2026Body dateline: Taipei January 2, 2025 announced the pair including PG27UCDM. Page publication header is January 3. Announcement event dateline used.

8 August 20245Press releasezowie.benq.com/en-us/news/2024/zowie-xl2566x-press-release.htmlRead 30 September 2026Costa Mesa, USA, August 8, 2024. The EU release of the same date says pre-orders start August 15

Status

Available10Retailer pageoffice-partner.de/asus-rog-swift-oled-pg27ucdm-gaming-monitor-67.32-cm-27-n2008213921Read 5 October 2026Exact product is currently offered for sale. Matching ASUS part number 90LM0B30-B01971.

Available8Retailer pageldlc.com/en/product/PB00654876.htmlRead 7 October 2026Exact 9H.LMRLB.QBE product is listed In stock on the access date. No interpretation of a templated maker Discontinued button.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$1,0998Press releasepress.asus.com/news/press-releases/rog-swift-oled-pg27ucdm-27-inch-4k-gaming-monitorRead 5 October 2026January 21, 2025 exact-model launch preorder release explicitly states MSRP USD 1099. MSRP excludes sales tax. Not a later retailer price.

Not available

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

€6999Press releasebenq.eu/de-de/news/products/zowie-xl2566x-plus.htmlRead 30 September 2026August 2024 announcement: pre-orders from August 15 at €699 including VAT in Germany.

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

Not available

Not available

ColoursiThe maker's own colour names

Black3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: Colors Black.

Black8Retailer pageldlc.com/en/product/PB00654876.htmlRead 7 October 2026Exact reference 9H.LMRLB.QBE technical specifications list Black. No extra colors inferred.

SegmentiFrom the maker's own product category. Office also covers home and everyday monitors.

Gaming1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Product is listed under Gaming Monitors.

Gaming1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Display

8 of 12 differ

Screen sizeiDiagonal in inches exactly as the maker advertises it. A class size and the viewable diagonal can differ.

27in(68.6 cm)2Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdmRead 5 October 2026Product heading explicitly says 27-inch (26.5-inch viewable). Advertised class size stored separately from viewable diagonal.

24.1in(61.2 cm)1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Viewable screen diagonaliDiagonal of the visible image area. This can be smaller than the advertised class size.

26.5in(67.3 cm)2Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdmRead 5 October 2026Product heading explicitly says 26.5-inch viewable.

Not available

Native resolution

3840 × 2160px1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display: Resolution 3840x2160.

1920 × 1080px1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Aspect ratio

16:91Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display: Aspect Ratio 16:9.

16:91Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Pixel density

163.2ppi=CalculatedFrom Screen size and Native resolution

91.4ppi=CalculatedFrom Screen size and Native resolution

Pixel pitchiDistance between adjacent pixels. Source notes identify horizontal or vertical pitch if they differ. A horizontal figure about a third of the vertical one is the pitch of one subpixel, not of a pixel, so the pixel figure is stored.

0.1553mm4Maker spec sheet (PDF)gzhls.at/blob/ldb/8/d/d/9/3249322c8dac04e25c37cdf4197f284bead7.pdfRead 5 October 2026Technical data page 2: 0.15525 x 0.15525 mm. Webpage says 0.153 mm. Datasheet preferred. Published pitch does not exactly reproduce the stated viewing area, so no area is derived from pitch.

0.279mm1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Active display areaiMaker published active-display width and height, excluding the external frame. Source notes distinguish image area from any published shift-reserve area. Dimensions are not inferred from native resolution or rounded pixel pitch.

Width589.97Height332.93mm(23.2 × 13.1 in)1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display Viewing Area (HxV): 589.97 x 332.93 mm. Published area is retained, not calculated from pitch. ASUS datasheet rounds this to 590 x 333 mm.

Width535.68Height298.08mm(21.1 × 11.7 in)1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Curved

No4Maker spec sheet (PDF)gzhls.at/blob/ldb/8/d/d/9/3249322c8dac04e25c37cdf4197f284bead7.pdfRead 5 October 2026Technical data page 2: Bildschirmform Flach (flat).

No8Retailer pageldlc.com/en/product/PB00654876.htmlRead 7 October 2026

Curvature radiusiRadius of screen curvature. A published 1800R is 1800 mm.

Not available

Not available

Screen surface

Semi-glossy6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026Key Specs and Features and Screen coating: standard semi-glossy QD-OLED coating.

Matte7Retailer pageamazon.com/dp/B0D3JC9S9MRead 30 September 2026"Screen Finish: Matte"

Anti-reflection coating

Anti-Reflection1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display Surface: Anti-Reflection. No coating brand is assigned from the generic OLED FAQ.

Not available

Touchscreen

No4Maker spec sheet (PDF)gzhls.at/blob/ldb/8/d/d/9/3249322c8dac04e25c37cdf4197f284bead7.pdfRead 5 October 2026Technical data page 2: Touchscreen Nein.

No8Retailer pageldlc.com/en/product/PB00654876.htmlRead 7 October 2026

Panel

18 of 31 differ

Panel type

QD-OLED1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display: Panel Type QD-OLED.

TN1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Panel type (as published)iPanel or technology name as published. This is separate from the normalised panel type.

Tandem QD-OLED1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display: Panel Technology Tandem QD-OLED.

Fast TN1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026Page title says "New Fast TN". Spec table says "TN" with "Fast liquid crystal: Yes"

BacklightiLayout of the backlight. OLED is none (self-emissive). WLED or LED alone names no layout, so it is left out unless a source states edge-lit or direct-lit.

None (self-emissive)6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026Black Depth, Shadow Detail and Contrast explains OLED pixels turn off individually to create black. No backlight.

Edge-lit LED10Reviewtomshardware.com/monitors/gaming-monitors/benq-zowie-xl2566x-400-hz-25-inch-gaming-monitor-reviewRead 7 October 2026Exact review specification table describes TN/W-LED edge array. DyAc2 dual backlight strobing does not change edge-lit classification.

Local dimming

Not available

Not available

Dimming zones

Not available

Not available

Panel maker

Samsung Display6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026Key Specs and Features names Samsung Display QD-OLED panel.

Not available

Panel part number

Not available

Not available

Panel generationiGeneration or panel architecture name stated by the source. Brand product generation and panel generation can differ.

4th gen2Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdmRead 5 October 2026Product highlights and 4th Gen QD-OLED section explicitly name fourth-generation QD-OLED.

Not available

Subpixel layoutiArrangement of the red, green, blue and any white emitters within a pixel. Individual emitter shapes do not establish their arrangement. Marketing names such as Primary RGB Tandem do not prove an RGB stripe layout.

Not available

Not available

Colour depthiSupported total colour depth per channel. A stated 8-bit plus FRC implementation is 10 supported bits with FRC, not native 10-bit. A 6-bit plus FRC panel, also called Hi-FRC, is 8 bits with FRC.

10bits3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: Display colors 10 bit.

8bits10Reviewtomshardware.com/monitors/gaming-monitors/benq-zowie-xl2566x-400-hz-25-inch-gaming-monitor-reviewRead 7 October 2026Specification table explicitly labels Native Color Depth 8-bit. No 10-bit input support is inferred.

Colour depth methodiNative panel bits or temporal frame rate control. Supported 10-bit input alone does not prove native 10-bit panel depth.

Native2Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdmRead 5 October 2026Product highlights expressly say true 10-bit color.

Native10Reviewtomshardware.com/monitors/gaming-monitors/benq-zowie-xl2566x-400-hz-25-inch-gaming-monitor-reviewRead 7 October 2026Table explicitly says Native Color Depth 8-bit, so not inferred from color-count arithmetic.

Displayable colours

1.07 billion1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display Colors: 1073.7M (10 bit), normalized to the project text convention.

Not available

sRGB coverageiPercentage of the sRGB reference gamut covered. Gamut volume is a different measure and is not stored here. Source notes identify the colour-space standard.

Not available

98%7Retailer pageamazon.com/dp/B0D3JC9S9MRead 30 September 2026"98% sRGB" in BenQ's own comparison table on the listing. Coverage or volume and CIE version not stated

DCI-P3 coverageiPercentage of DCI-P3 covered. Do not substitute gamut volume. Source notes identify the CIE reference and any minimum or typical qualifier.

99%1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display: Color Space (DCI-P3) 99%. CIE reference is not stated. The separate 145% sRGB claim is not coverage and is omitted.

Not available

Adobe RGB coverageiPercentage of Adobe RGB covered. Do not substitute gamut volume.

Not available

Not available

Rec. 2020 coverageiPercentage of Rec. 2020 covered. Do not substitute gamut volume.

Not available

Not available

NTSC coverageiPercentage of the NTSC reference gamut covered. Source notes identify the reference. Do not substitute gamut volume.

Not available

Not available

Factory calibrated

Yes6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026sRGB Emulation Modes: the display comes factory calibrated to Delta E below 2 in sRGB Cal preset. The calibration report is electronic and accessible through OSD. This does not establish a paper report in the box.

Not available

Claimed Delta EiMaker claim for colour error. Source notes retain a less-than qualifier, the colour space and whether the figure is an average or maximum.

21Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display: Color Accuracy Delta E < 2. Less-than qualifier retained. Exact calibration mode is sRGB Cal in the TFTCentral report.

Not available

Paper calibration report in boxiA physical calibration report included in the package. An electronic report in the menu or software does not count as a paper report.

Not available

Not available

Hardware calibration supportiCalibration writes to the monitor internal hardware LUT. Ordinary colour controls or a computer ICC profile do not establish this feature.

Not available

Not available

Static contrast ratioiPanel native static contrast, without dynamic contrast processing or local dimming. 1000 means 1000:1. Do not store a dynamic contrast claim here.

1,500,000:13Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: Contrast ratio 1.5M:1. Maker typical panel contrast.

1,000:11Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Brightness (typical, SDR)iMaker typical SDR white luminance. Source notes state any window size, average picture level and operating mode.

250nits3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: Brightness 250 nits (typ.). No full-screen or window condition is stated.

320nits1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Brightness (maker minimum)iMaker minimum guaranteed brightness specification under its stated conditions. This is not the lowest user-selectable brightness unless the source explicitly says so.

Not available

Not available

Peak brightness (HDR)iMaker peak HDR white luminance. The source notes state window size or average picture level, mode and time limit where published.

1,000nits1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display: Brightness (HDR, Peak) 1000 cd/m2. Footnote says peak may vary due to color pre-calibration. Window size is not published.

Not available

HDR peak test windowiPercentage of screen area used for the peak HDR claim. If the maker publishes average picture level instead, source notes identify that distinction.

Not available

Not available

Full-screen brightnessiMaker white luminance at 100% screen area or 100% average picture level. Source notes state SDR or HDR and mode.

Not available

Not available

HDR formats

HDR10, Dolby Vision1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display: HDR10 and Dolby Vision.

Not available

HDR certificationiVESA DisplayHDR certification. None needs a source, such as the maker saying the monitor has no DisplayHDR certification or the model being absent from the VESA list. When no source was checked, it is left out.

DisplayHDR True Black 4001Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Certificate: VESA DisplayHDR 400 True Black.

None8Retailer pageldlc.com/en/product/PB00654876.htmlRead 7 October 2026Technical specifications / HDR(High Dynamique Range):No. This exact-model public row establishes absence of HDR support and certification.

Viewing angle (horizontal)

178°1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display: Viewing Angle (CR >= 10) 178 degrees horizontal.

170°8Retailer pageldlc.com/en/product/PB00654876.htmlRead 7 October 2026170 horizontal and 160 vertical. TFTCentral's launch news gives the same 170/160 from BenQ's original spec page

Viewing angle (vertical)

178°1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display: Viewing Angle (CR >= 10) 178 degrees vertical.

160°8Retailer pageldlc.com/en/product/PB00654876.htmlRead 7 October 2026

Refresh rate and motion

14 of 22 differ

Refresh rate per resolution and portiHighest accepted rate for each proven resolution, input and operating condition. Preset or supported timing lists alone do not prove a maximum. Keep separate bit-depth, chroma and DSC conditions. Dual-mode or crop-mode requirements belong in source notes. Unknown input stays unknown.

AASUS ROG Swift OLED PG27UCDM

Refresh rate per resolution and port. The top rate is in bold.

Resolution	HDMI 2.1	DisplayPort 2.1a UHBR20, 1.4	USB-C
3840 × 2160Native	240Hz	240Hz	240Hz

Source6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026Gaming native-resolution maximum table explicitly gives 240Hz for DP, HDMI and USB-C. DisplayPort 2.1 section states 4K240 uncompressed on UHBR20, or DP1.4 with DSC. Bit depth and chroma are not attached to those 240Hz rows without explicit evidence. USB-C 240Hz requires USB 2.0 data bandwidth. Manual 3-14 limits USB 3.2 data mode to 4K120Hz. NVIDIA DSR/DLDSR table gives DP1.4 DSC-off maxima 4K97Hz 8-bit RGB and 4K120Hz 10-bit 4:2:2, plus HDMI 2.1 DSC-off 4K120Hz 10-bit RGB. Test GPU RTX 3090 had DP1.4. No lower-resolution preset is treated as a maximum.

BBenQ ZOWIE XL2566X+

Refresh rate per resolution and port. The top rate is in bold.

Resolution	HDMI 2.0	DisplayPort 1.4
1920 × 1080Native	240Hz	400Hz

Source1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026Specs/FAQ: DisplayPort 1.4 maximum 400 Hz, HDMI 2.0 maximum 240 Hz, native 1920×1080. Lower-resolution timing entries do not independently establish accepted maxima.

Max refresh rateiHighest proven accepted rate across the stored modes, including lower-resolution dual modes.

240Hz=CalculatedFrom Refresh rate per resolution and port

400Hz=CalculatedFrom Refresh rate per resolution and port

Max refresh rate at native resolutioniHighest proven accepted rate at the native pixel resolution, across all inputs and stored operating conditions.

240Hz=CalculatedFrom Refresh rate per resolution and port and Native resolution

400Hz=CalculatedFrom Refresh rate per resolution and port and Native resolution

Max refresh rate over DisplayPortiHighest proven accepted rate over DisplayPort at native resolution. A higher lower-resolution dual mode is separate.

240Hz=CalculatedFrom Refresh rate per resolution and port and Native resolution

400Hz=CalculatedFrom Refresh rate per resolution and port and Native resolution

Max refresh rate over HDMIiHighest proven accepted rate over HDMI at native resolution. Console refresh limits can be lower than PC limits.

240Hz=CalculatedFrom Refresh rate per resolution and port and Native resolution

240Hz=CalculatedFrom Refresh rate per resolution and port and Native resolution

Max refresh rate over USB-CiHighest proven accepted rate over USB-C or Thunderbolt at native resolution. USB data bandwidth settings can lower the video maximum.

240Hz=CalculatedFrom Refresh rate per resolution and port and Native resolution

Not available

Max refresh rate at 10-bitiHighest stored native-resolution mode explicitly proven at 10-bit colour. Rows without bit-depth evidence do not count.

120Hz=CalculatedFrom Refresh rate per resolution and port and Native resolution

Not available

Native refresh rateiHighest refresh rate the maker rates without overclock. A lower optimum or recommended mode in a manual is not this value.

240Hz6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026Gaming: 240Hz OLED panel and native-resolution maximum refresh table. No overclock setting is claimed.

400Hz1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026"Refresh Rate 400 Hz". The Q&A says DisplayPort 1.4 supports 400Hz and HDMI 2.0 supports a maximum of 240Hz

Overclocked refresh rate

Not available

Not available

Dual modeiA dedicated display mode that changes resolution to raise the maximum refresh rate. Ordinary image scaling or a preset timing does not count.

No6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026Conclusion explicitly says dual-mode functionality and boosted refresh rate are missing.

Not available

Minimum fixed refresh rateiLowest fixed input rate accepted by the monitor. A VRR lower limit or general vertical scan range is not this value.

Not available

Not available

Adaptive sync technologiesiExact published adaptive-sync protocol or named certification. Generic Adaptive-Sync support does not prove VESA AdaptiveSync Display certification. Source notes distinguish protocols from certifications.

FreeSync Premium Pro, G-SYNC Compatible, VESA AdaptiveSync Display, HDMI VRR1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Features and Certificate name FreeSync Premium Pro, G-SYNC Compatible and VESA AdaptiveSync Display 240Hz. HDMI VRR is separately verified by TFTCentral. Its early review says FreeSync Premium, superseded here by current maker Premium Pro claim.6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026Console Gaming table marks HDMI-VRR supported. Early review names FreeSync Premium. Current maker names Premium Pro, which takes precedence.

Adaptive-Sync2Owner's manualesupportdownload.benq.com/esupport/ESPORTS%20DISPLAY/UserManual/XL2540X+/UM_EN_250731185408.pdfRead 30 September 2026System > Adaptive-Sync is a generic support claim, not VESA AdaptiveSync Display certification. HDMI 2.0 support is limited to AMD graphics cards on XL2566X+.

VRR range per portiVariable-refresh-rate operating range for each input and the operating mode named in source notes. A fixed timing or general vertical scan range alone is not a VRR range.

AASUS ROG Swift OLED PG27UCDM

Input	Min (Hz)	Max (Hz)
HDMI	48	240
DisplayPort	48	240

Source3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Gaming 3-2: Variable Refresh Rate can only be activated within 48Hz to 240Hz for HDMI and DisplayPort. USB-C is not named, so no USB-C range is inferred.

BBenQ ZOWIE XL2566X+

Input	Min (Hz)	Max (Hz)
HDMI	60	240

Source16Reviewjisakuhibi.jp/zowie-xl2566x-plusRead 7 October 2026Exact HDMI EDID read with Custom Resolution Utility 1.5.2: FreeSync range 60-240 Hz. This is device-declared operating range, not an independently swept boundary test. AMD GPU required for HDMI Adaptive-Sync. Not HDMI 2.1 VRR or NVIDIA HDMI support. DisplayPort minimum remains unproved.

Low framerate compensation

Not available

Not available

Response time (maker GtG claim)iMaker grey-to-grey pixel transition claim. Source notes state fastest overdrive or other conditions where published.

0.03ms1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display: Response Time 0.03ms (GTG). Transition endpoints are not stated.

Not available

Response time (maker MPRT claim)iMaker moving-picture response-time claim, often with strobing enabled. This is not a grey-to-grey transition time.

Not available

Not available

Overdrive settings

Not available

Premium, High, Customize, OFF2Owner's manualesupportdownload.benq.com/esupport/ESPORTS%20DISPLAY/UserManual/XL2540X+/UM_EN_250731185408.pdfRead 30 September 2026AMA menu options, page 48

Motion blur reductioniA dedicated blur-reduction feature using backlight strobing or black frame insertion. OLED monitors have no backlight.

Yes3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Gaming 3-2: ELMB mode, available only at 120Hz. TFTCentral verifies black frame insertion.

Yes1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Blur-reduction technologyiPublished name of the backlight strobing or black frame insertion feature.

ELMB3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Gaming 3-2: ELMB.

DyAc 21Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Blur reduction works with VRRiWhether the dedicated strobing or black frame insertion mode can operate at the same time as variable refresh rate.

No3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Gaming 3-2: turn off Variable Refresh Rate before activating ELMB.

No1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026Spec table: "Variable Refresh Rate: Yes (DyAc 2 OFF)"

Flicker-free (claimed)

Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Display: Flicker free Yes. This is the maker claim, distinct from VRR flicker.

Yes1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026"Flicker-free Technology: Yes (DyAc 2 OFF)"

Black frame insertion

Yes6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026ELMB section verifies fixed 120Hz SDR BFI with 50:50 duty cycle. Does not work with VRR or HDR.

Not available

Measured

4 of 12 differ

Input lag at maximum refresh rateiReviewer total display lag at the monitor highest accepted refresh rate, including a faster dual mode. Native-rate measurements below that maximum and processing-only delay are excluded. Source notes name the rate, resolution and test method.

Not available

Not available

Input lag at 60 HziReviewer total display lag with a fixed 60 Hz input. Processing-only delay is excluded. Source notes name the resolution, mode and test method.

Not available

Not available

Average response time (measured)iReviewer mean grey-to-grey transition time across tested transitions. Source notes state the measurement endpoint, method, refresh rate and overdrive. A single worst transition or an unaveraged settling time does not count.

0.5ms6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026Response Times chart response_1-1.png: average G2G across 30 measured transitions at 240Hz. Method is initial response time G2G, gamma corrected, RGB 10 tolerance. Overdrive n/a. Article says results remain consistent at 120Hz, 60Hz and VRR. Not the best or worst transition.

3ms15Measurementjisakuhibi.jp/zowie-xl2566x-plusRead 7 October 2026Literal Average Transient Response 3.0ms in the exact XL2566X+ 400Hz/High chart. Mean of 30 rise/fall transitions among RGB 0/51/102/153/204/255. Endpoint starts at response onset and first reaches 5 RGB code values before the target, not a final settling endpoint after overshoot. Own optical sensor/oscilloscope tool, estimated 0.1ms precision with experimental analysis limits disclosed. Perceived 3.4ms and complete 9.5ms endpoints differ and are excluded.

Overshoot (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Contrast ratio (measured)i1000 means 1000:1. Measured by a reviewer

Not available

1,433.7:111Measurementtomshardware.com/monitors/gaming-monitors/benq-zowie-xl2566x-400-hz-25-inch-gaming-monitor-review/3Read 7 October 2026Literal chart 1433.7:1, Maximum Brightness Settings, Stock, under Uncalibrated Maximum Backlight Level. FPS1/Normal color temperature is the documented default. Full-field white/black follows the linked published method. Exact DyAc2 state is not individually labelled on this chart. Article separately contrasts approximately 310 nits with DyAc2 engaged. Calibrated 1442.9 and ANSI 1376 are distinct results and excluded.14Measurementtomshardware.com/reference/how-we-test-pc-monitors-benchmarkingRead 7 October 2026Method: full-field white and black luminance with the same equipment (i1Pro, i1DisplayPro, Calman, AccuPel).17Measurementtomshardware.com/reference/how-we-test-pc-monitors-benchmarking/3Read 7 October 2026Linked published protocol uses full-field white/black at maximum brightness before color adjustment. Static white-to-black ratio is separate from ANSI and post-calibration contrast.

SDR brightness (measured)iReviewer measured SDR white luminance. Source notes state picture mode, window size and brightness setting where available.

263nits6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026Brightness and Contrast: Uniform Brightness ON, maximum brightness setting, OLED care disabled for testing. Luminance remains constant across APL window sizes. UB OFF reaches 465 nits in text (463 in summary table), with ABL. Uniform mode value stored.

343.1476nits11Measurementtomshardware.com/monitors/gaming-monitors/benq-zowie-xl2566x-400-hz-25-inch-gaming-monitor-review/3Read 7 October 2026Literal chart 343.1476 cd/m2, Maximum Brightness Settings, Stock, before calibration. FPS1 is the documented default. Full-field white and maximum brightness follow the linked published test method. Exact DyAc2 state is not individually labelled on the chart. Article separately reports approximately 310 nits with DyAc2 engaged. No chart estimate or strobing result substitution.14Measurementtomshardware.com/reference/how-we-test-pc-monitors-benchmarkingRead 7 October 2026Method: full-field luminance with an i1Pro spectrophotometer, i1DisplayPro colorimeter, Calman and AccuPel reference signal generator. Method site page numbering can redirect between revisions.17Measurementtomshardware.com/reference/how-we-test-pc-monitors-benchmarking/3Read 7 October 2026Review links the published brightness/contrast method. Uncalibrated Maximum Backlight explicitly uses full-field white/black and brightness control all the way up, before color adjustments, avoiding clipping. Current method page was last updated after the 2024 review, so this is published protocol provenance rather than a new claim about historical fixture revisions.

HDR brightness in a real scene (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

PWM flicker frequency (measured)iOnly when the reviewer found PWM flicker

Not available

Not available

VRR range (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Colour accuracy (measured Delta E)iReviewer average colour error before calibration. Source notes name picture mode, reference colour space and Delta E method. Post-calibration results are excluded.

1.46Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026sRGB Colour Gamut mode (Racing preset): average sRGB color Delta E 2000 before calibration. CIE 1976 gamut method, factory settings otherwise, ICC profiles deactivated. Default wide-gamut average is 4.1, not selected here.

10.093412Measurementtomshardware.com/monitors/gaming-monitors/benq-zowie-xl2566x-400-hz-25-inch-gaming-monitor-review/4Read 7 October 2026Before calibration, FPS1 default/Normal color temperature. Source Color Gamut chart explicitly labels Avg dE2000: 10.0934 with sRGB targets on CIE 1976 u-v plot. Calman/i1Pro saturation sweep of six colors at 20/40/60/80/100 percent. Grayscale 6.7456 and calibrated gamut 7.58 are excluded.14Measurementtomshardware.com/reference/how-we-test-pc-monitors-benchmarkingRead 7 October 2026Method: six-color saturation sweeps with the same equipment (i1Pro, i1DisplayPro, Calman, AccuPel).

Gray uniformity (measured)iDeviation on a 50 % gray screen. Measured by a reviewer

Not available

Not available

Reflections (measured)iTotal reflections. Measured by a reviewer

Not available

Not available

Connectivity

14 of 19 differ

Video inputsiPhysical connectors that accept a display signal. A USB-C data-only charging port is not a video input. Counts exclude USB hubs and audio jacks.

AASUS ROG Swift OLED PG27UCDM

Type	Version	Count	Max bandwidth (Gbps)
DisplayPort	2.1a UHBR20	1	80
HDMI	2.1	2	48
USB-C	Not available	1	Not available

Source2Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdmRead 5 October 2026Unlock the future with DisplayPort 2.1a section gives 80 Gbps DP and 48 Gbps HDMI. Physical counts and USB-C DP Alt Mode come from I/O Ports on the spec page. No link version or bandwidth is inferred for USB-C.

BBenQ ZOWIE XL2566X+

Type	Version	Count
HDMI	2.0	3
DisplayPort	1.4	1

Source1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

HDMI ports

2=CalculatedFrom Video inputs

3=CalculatedFrom Video inputs

DisplayPort ports

1=CalculatedFrom Video inputs

1=CalculatedFrom Video inputs

Highest HDMI version

2.1=CalculatedFrom Video inputs

2.0=CalculatedFrom Video inputs

Highest DisplayPort version

2.1a UHBR20=CalculatedFrom Video inputs

1.4=CalculatedFrom Video inputs

HDMI features

CEC, VRR, ALLM3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026System Setup 3-15: ASUS Power Sync controls CEC source power. TFTCentral Console Gaming verifies HDMI VRR and ALLM.6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026Console Gaming table explicitly marks HDMI-VRR and Auto Low Latency Mode (ALLM) supported. CEC separately sourced to manual.

Not available

USB-C video (DP Alt Mode)

Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026I/O Ports: USB-C x1 (DP Alt Mode).

No10Reviewtomshardware.com/monitors/gaming-monitors/benq-zowie-xl2566x-400-hz-25-inch-gaming-monitor-reviewRead 7 October 2026Inputs/OSD discussion explicitly says no USB ports. The dedicated S Switch socket is a proprietary control connection, not a USB-C video/hub connection.

USB-C power deliverediPower the monitor supplies to a connected device. Source notes distinguish guaranteed, maximum and shared dynamic limits. Power consumed by the monitor is separate.

90W1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026I/O Ports: USB-C Power Delivery 90W.

Not available

Thunderbolt

Not available

Not available

USB upstream portsiUSB connections from the monitor hub to host computers. Video input and downstream charging ports are separate.

AASUS ROG Swift OLED PG27UCDM

Connector	USB version	Count
USB-B	3.2 Gen 1	1
USB-C	Not available	1

Source3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: USB 3.2 Gen 1 Type-B x1 upstream. Back View 1-5: USB-C supports data transmission. System Setup 3-14: USB-C data can be USB 2.0 or USB 3.2, so no single USB version is assigned to that row.

BBenQ ZOWIE XL2566X+

Not available

USB downstream hub portsiUSB hub connections for peripherals. These exclude host-facing upstream ports. A port the maker names for service or firmware updates only is not counted.

AASUS ROG Swift OLED PG27UCDM

Connector	USB version	Count
USB-A	3.2 Gen 1	3

Source3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: downstream USB Type-A x3. The ASUS datasheet mislabels host-facing USB-C as downstream, so it is excluded from peripheral hub count.

BBenQ ZOWIE XL2566X+

Not available

KVM switch

Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Features: KVM Switch Yes.

Not available

Daisy chain (MST)

Not available

Not available

Ethernet

Not available

Not available

3.5 mm headphone outputiAnalogue headphone or audio output. A shared four-pole headset jack counts.

Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026I/O Ports: Earphone jack Yes. ASUS datasheet specifies 3.5 mm.4Maker spec sheet (PDF)gzhls.at/blob/ldb/8/d/d/9/3249322c8dac04e25c37cdf4197f284bead7.pdfRead 5 October 2026Connectivity page 2: Kopfhörer-Anschluss 3.5 mm.

Yes1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

3.5 mm microphone inputiAnalogue microphone input, including the microphone contacts of a shared four-pole headset jack. This does not imply a separate microphone socket.

No6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026Useful Office Features table explicitly marks Mic input unsupported.

Not available

Optical out

No3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: SPDIF out No.

Not available

Picture in picture

Yes3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026PIP/PBP menu 3-11 offers PIP Mode.

Not available

Picture by picture

Yes3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026PIP/PBP menu 3-11 offers PBP Mode.

Not available

Smart features

None of 4 known

Smart platform

Not available

Not available

Wi-Fi

Not available

Not available

Bluetooth

Not available

Not available

Remote control

Not available

Not available

Audio and camera

0 of 5 differ

Speakers

No1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Audio: Speaker No.

No8Retailer pageldlc.com/en/product/PB00654876.htmlRead 7 October 2026Technical specifications, Multimedia: Built-in speakers No.

Number of speakers

Not available

Not available

Speaker power per channeliRated power per speaker or output channel. Do not store the total of all speakers here.

Not available

Not available

Webcam

No4Maker spec sheet (PDF)gzhls.at/blob/ldb/8/d/d/9/3249322c8dac04e25c37cdf4197f284bead7.pdfRead 5 October 2026Multimedia page 3: Integrierte Kamera Nein.

No8Retailer pageldlc.com/en/product/PB00654876.htmlRead 7 October 2026

Microphone

Not available

Not available

Ergonomics and controls

12 of 15 differ

Stand height adjustmentiVertical travel of the supplied stand. This is not the total height of the monitor.

110mm3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: Height adjustment 0 to 110 mm.

155mm1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

TiltiMaximum movement from the neutral position with the supplied stand. Each direction is stored as a positive magnitude.

Forward5°Backward20°3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: tilt -5 to +20 degrees. Positive directional magnitudes stored.

Forward5°Backward35°1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026Published as "Tilt (down/up) -5˚- 35˚"

SwiveliMaximum movement from the neutral position with the supplied stand. Each direction is stored as a positive magnitude.

Left30°Right30°3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: swivel +/-30 degrees.

Left45°Right45°1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

PivotiMaximum movement from the neutral position with the supplied stand. Each direction is stored as a positive magnitude. Pivot is rotation in the screen plane. A small slant adjustment for levelling, as Dell calls it, counts.

Counterclockwise90°Clockwise90°3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: pivot +/-90 degrees.

Not available

Removable stand

Yes3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Detaching the Stand 2-3 instructs pressing release button and removing stand.

Yes2Owner's manualesupportdownload.benq.com/esupport/ESPORTS%20DISPLAY/UserManual/XL2540X+/UM_EN_250731185408.pdfRead 30 September 2026

VESA mount

100 x 1001Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Mechanical Design: VESA Wall Mounting 100x100mm.

100 x 1001Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

VESA adapter needed

Yes3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Detaching the Stand 2-3 instructs installing the wall mount bracket on the rear, then the VESA wall mount kit. Manual calls kit separately purchased, while package list and maker page list it in the box.

Not available

Security lock slot

Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Mechanical Design: Kensington Lock Yes.

Yes1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

On-screen menu controlsiControls that operate the monitor menu or display settings. Desktop window-layout software alone does not count as menu control.

Joystick, Buttons, Software2Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdmRead 5 October 2026Product highlights say DisplayWidget Center adjusts monitor settings with a mouse. Physical controls are described in manual 1.3.1 and TFTCentral Design and Features.

Joystick, Buttons2Owner's manualesupportdownload.benq.com/esupport/ESPORTS%20DISPLAY/UserManual/XL2540X+/UM_EN_250731185408.pdfRead 30 September 20265-way controller, Input key and Power button on the back. The wired S Switch is also included

Desktop software

DisplayWidget Center1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Features: DisplayWidget Center.

XL Setting to Share1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

User firmware updates

Yes6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026Design and Features says user-updatable firmware. Current maker support download also lists MCM108 firmware.

Not available

Ambient light sensoriPresence of a physical ambient-light sensor. A regulatory statement that Automatic Brightness Control is unavailable does not prove the sensor is absent. Human presence or proximity sensing is separate.

No6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026Useful Office Features table explicitly marks Ambient light sensor unsupported. Not inferred from EPREL ABC status.

Not available

Presence sensoriPresence of a person-detection or proximity sensor. Source notes distinguish room presence from near-screen detection. Absence of one kind does not prove absence of every presence sensor.

Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Mechanical Design: Neo Proximity Sensor. It detects a user near the screen, not room occupancy.

Not available

RGB lightingiDecorative illumination explicitly described as RGB or documented with selectable red, green and blue colours. A power LED or only one or two fixed colours is insufficient.

Yes6Measurementtftcentral.co.uk/reviews/asus-rog-swift-pg27ucdmRead 5 October 2026Design and Features explicitly describes RGB lighting logo on rear.

No10Reviewtomshardware.com/monitors/gaming-monitors/benq-zowie-xl2566x-400-hz-25-inch-gaming-monitor-reviewRead 7 October 2026Only the power-toggle LED is present. Review explicitly says no other LED lighting.

Gaming menu features

FPS Counter, Crosshair, Dynamic Crosshair, Sniper, Timer, Stopwatch, Display Alignment, GameVisual, Shadow Boost, Aspect Control3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026GamePlus 1.3.3 and Gaming 3-2 to 3-3 list these functions. Image 3-5 names Aspect Control.

Black eQualizer, Color Vibrance, Auto Game Mode1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026Auto Game Mode comes with XL Setting to Share

OLED care

3 of 3 differ

OLED care

Screen Saver, Pixel Cleaning, Pixel Cleaning Reminder, Screen Move, Auto Logo Brightness, Neo Proximity Sensor, OLED Usage Info3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026OLED Care 3-8 to 3-9 names these options. Latest manual used rather than older review menu screenshots.

Not available

Burn-in covered by warrantyiWarranty explicitly covers permanent OLED image burn-in. A general panel warranty alone does not prove burn-in coverage.

Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Warranty: 3 years including panel burn-in.

Not available

Burn-in warranty length

3years1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Warranty: 3 years including panel burn-in.

Not available

Dimensions and weight

6 of 7 differ

Dimensions with standiOverall monitor dimensions with the supplied stand. Minimum and maximum heights require the stand position to be identified by the source.

Width610.3Height (lowest)439.5Height (highest)549.5Depth218.8mm(24 × 17.3 to 21.6 × 8.6 in)3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16 explicitly labels lowest 610.3 x 439.5 x 218.8 mm and highest 610.3 x 549.5 x 218.8 mm.

Width576.15Height (lowest)362.3Height (highest)517.3Depth171.65mm(22.7 × 14.3 to 20.4 × 6.8 in)1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026Published as 576.15x517.3(High)/362.3(Low)x171.65. Tom's Hardware and retailers list 208-209 mm depth. The maker value is kept

Dimensions without standiOverall monitor body dimensions after the stand is removed, including the frame and rear housing.

Width610.3Height369.2Depth70.5mm(24 × 14.5 × 2.8 in)3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: 610.3 x 369.2 x 70.5 mm without stand. Matches webpage and ASUS datasheet. Outline 3-18 instead marks 66.5 mm depth and 352.4 mm height, an unresolved drawing conflict.

Not available

Stand footprintiWidth and depth of the stand base on the desk. A maker's stand width and depth count.

Not available

Not available

Weight with standiWeight with the supplied stand. Source notes state if cables are included. Packaging weight is separate.

7.62kg(16.8 lb)3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-17: 7.62 +/-0.5 kg with stand. Cable inclusion is not stated.

5.8kg(12.8 lb)1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026Published as "Net Weight (kg) 5.8". Retailer avxperten lists 5800 g with stand, so net weight is read as with stand

Weight without standiMonitor body weight without stand. Source notes state whether cables are included.

5kg(11 lb)3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-17: 5.0 +/-0.5 kg without stand. Webpage estimates 4.97 kg. Manual preferred. Cable inclusion is not stated.

3.6kg(7.9 lb)16Reviewjisakuhibi.jp/zowie-xl2566x-plusRead 7 October 2026Review overview explicitly gives 3.6 kg for monitor panel body without stand, versus 5.8 kg with stand. Published specification, no independent weighing method stated. Exact BenQ Japan supplied XL2566X+ sample.

Box dimensionsiShipping box width, height and depth in the maker published orientation. A flat-packed box can have a smaller height than the upright display.

Width490Height894Depth188mm(19.3 × 35.2 × 7.4 in)3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-17 explicitly labels 490 x 894 x 188 mm (W x H x D). Webpage and datasheet reverse first two axes and give 896 mm instead of 894 mm. Manual published orientation retained.

Not available

Box weight

12.4kg(27.3 lb)3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-17: 12.4 +/-0.5 kg gross.

9.7kg(21.4 lb)1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026Gross weight

Power

7 of 13 differ

Power supplyiUSB-C powered monitors can draw power from a compatible host or an optional USB-C power source. This does not establish a bundled adapter. Record a supplied adapter and its rating separately.

Internal5EU energy label (EPREL)eprel.ec.europa.eu/fiches/electronicdisplays/Fiche_2195069_EN.pdfRead 5 October 2026Page 1 parameter 24: Internal.

Internal1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Adapter ratingiRated output power of the external power adapter. Do not substitute the monitor maximum consumption.

Not available

Not available

Input voltage

100-240 V AC, 50/60 Hz3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: AC 100-240V, 50/60Hz.

100-240 V AC1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Power use (typical)iMaker typical operating power under a stated test condition. An unlabeled Power On upper bound does not establish a typical value. EU label test power has separate fields. An ENERGY STAR on-mode (Pon) figure is not a typical value.

Not available

Not available

Power use (max)iMaker maximum operating power. Source notes state whether USB charging and connected-device load are included.

Not available

65W1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026Published as "<65W"

Power use SDR (EU label)iSDR on-mode power demand in the EU product information sheet, in watts. It can differ from rounded energy-label kWh per 1000 hours.

25.4W5EU energy label (EPREL)eprel.ec.europa.eu/fiches/electronicdisplays/Fiche_2195069_EN.pdfRead 5 October 2026Page 1 parameter 4: on-mode SDR power demand 25.4W.

18.3W3EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/1959872Read 30 September 2026

Power use HDR (EU label)iHDR on-mode power demand in the EU product information sheet, in watts. It can differ from rounded energy-label kWh per 1000 hours.

36W5EU energy label (EPREL)eprel.ec.europa.eu/fiches/electronicdisplays/Fiche_2195069_EN.pdfRead 5 October 2026Page 1 parameter 6: on-mode HDR power demand 36.0W.

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Standby poweriPower in standby or DPMS. Source notes retain any less-than qualifier.

0.5W3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: Power saving <0.5W. Upper bound retained, not an exact measured consumption.

0.5W3EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/1959872Read 30 September 2026

Off-mode poweriPower when switched off but still connected to mains. Source notes retain any less-than qualifier.

0.3W3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026Specifications 3-16: Power Off <0.3W. Upper bound retained.

0.3W3EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/1959872Read 30 September 2026

EU energy class SDR

F5EU energy label (EPREL)eprel.ec.europa.eu/fiches/electronicdisplays/Fiche_2195069_EN.pdfRead 5 October 2026Page 1 parameter 3: F.

E3EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/1959872Read 30 September 2026HDR energy class is listed as NA, so the HDR fields are left out

EU energy class HDR

G5EU energy label (EPREL)eprel.ec.europa.eu/fiches/electronicdisplays/Fiche_2195069_EN.pdfRead 5 October 2026Page 1 parameter 5: G.

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Energy per 1000 h SDR

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18kWh4EU energy label (EPREL)eprel.ec.europa.eu/labels/electronicdisplays/Label_1959872.svgRead 30 September 2026Published energy label SDR kWh/1000h value, read directly from label.

Energy per 1000 h HDR

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Certifications

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VESA ClearMR

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VESA AdaptiveSync Display

240Hz1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Certificate: VESA AdaptiveSync Display 240Hz.

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TÜV certifications

TÜV Flicker-free, TÜV Low Blue Light (Hardware Solution)1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Certificate lists both exact names.

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Low blue lightiHardware means a published panel-level hardware low-blue-light solution. Software means a selectable picture filter. Hardware does not require a selectable filter mode.

Hardware1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Certificate expressly names Low Blue Light (Hardware Solution). The manual also has a software filter.

Software2Owner's manualesupportdownload.benq.com/esupport/ESPORTS%20DISPLAY/UserManual/XL2540X+/UM_EN_250731185408.pdfRead 30 September 2026Picture menu: Low Blue Light is an adjustable setting with levels 0-10.

ENERGY STAR

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TCO Certified

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EPEAT

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Colour certifications

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Other certifications

FSC MIX1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Certificate: FSC MIX.

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In the box

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In the box

DisplayPort 2.1 (DP80) cable, HDMI Ultra High Speed Cable, Microfiber cloth, Power cord, Quick start guide, ROG pouch, ROG sticker, USB 3.2 cable, USB-C cable, VESA mount kit, Warranty Card1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Accessories vary by region. Manual 1-1 calls USB-C, HDMI, DP and USB cables optional. No paper color-calibration report is listed.

LCD Monitor, Monitor Stand, Monitor Base, Quick Start Guide, Safety Instructions, Regulatory Statements, S Switch, Shields (Shading hood), Power Cord, Video Cable: DP, Video Cable: HDMI2Owner's manualesupportdownload.benq.com/esupport/ESPORTS%20DISPLAY/UserManual/XL2540X+/UM_EN_250731185408.pdfRead 30 September 2026Page 12-13. The manual says supplied items may differ by region

Cables includediCables supplied with the product. Count is included only when the source establishes it. Bundles can vary by market.

AASUS ROG Swift OLED PG27UCDM

Type
DisplayPort 2.1 (DP80) cable
HDMI Ultra High Speed Cable
Power cord
USB 3.2 cable
USB-C cable

Source1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Accessories vary by region. Counts are not stated. DisplayPort cable and DP80 cable are not counted as two separate cables.

BBenQ ZOWIE XL2566X+

Type
DP 1.4 (1.8m)
HDMI 2.0 (1.8m)
Power Cable (1.8 m)

Source1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

3years1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Warranty: global page states 3 years including panel burn-in.

3years7Retailer pageamazon.com/dp/B0D3JC9S9MRead 30 September 2026Item details: Warranty Description 3 Years Manufacturer. U.S. listing.

Dead pixel policy

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US Full HD policy allows up to 2 bright subpixels, 5 dark subpixels and 5 total subpixel defects. Defects exceeding these limits are covered by the manufacturer warranty.13Maker product pagebenq.com/en-us/support/downloads-faq/faq/product/application/dead-pixel-policy.htmlRead 7 October 2026US general LCD monitor policy applies to FHD 1920x1080 models outside the listed PV/SW/PD Zero Bright Dot models. XL2566X+ is FHD and is not one of those named exceptions. Region-specific limits may differ. No zero-defect guarantee claimed.

Links

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Product page

rog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Exact-model product page.

zowie.benq.com/en-us/monitor/xl2566x-plus.html1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026

Spec sheet

rog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/spec1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucdm/specRead 5 October 2026Exact-model technical specifications.

zowie.benq.com/en-us/monitor/xl2566x-plus.html1Maker product pagezowie.benq.com/en-us/monitor/xl2566x-plus.htmlRead 7 October 2026The maker Specifications section is the opened exact-model specification sheet. It is an HTML table on the product page, not an invented PDF URL.

Manual

dlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdf3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCDM/ASUS_PG27UCDM_UM-EN.pdfRead 5 October 2026User Guide, English edition. Correct filename uses UM-EN.

esupportdownload.benq.com/esupport/ESPORTS%20DISPLAY/UserManual/XL2540X+/UM_EN_250731185408.pdf2Owner's manualesupportdownload.benq.com/esupport/ESPORTS%20DISPLAY/UserManual/XL2540X+/UM_EN_250731185408.pdfRead 30 September 2026Shared XL Series manual (XL25X-EM-V4, 2025/06/24) that covers XL2540X+, XL2546X, XL2546X+, XL2566X+, XL2586X and XL2586X+

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

21950695EU energy label (EPREL)eprel.ec.europa.eu/fiches/electronicdisplays/Fiche_2195069_EN.pdfRead 5 October 2026Product Information Sheet page 2 registration number. Page 1 exact model PG27UCDM.

19598722Owner's manualesupportdownload.benq.com/esupport/ESPORTS%20DISPLAY/UserManual/XL2540X+/UM_EN_250731185408.pdfRead 30 September 2026Page 3: "XL2566X+: 1959872"

Both are also in the API. Back to all monitors.