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ASUS ROG Swift OLED PG27UCWM vs LG UltraGear 27GX790B

Product A: ASUS

ROG Swift OLED PG27UCWM

116 of 172 known
Change ASUS ROG Swift OLED PG27UCWM

Compare the LG UltraGear 27GX790B with

Product B: LG

UltraGear 27GX790B

103 of 172 known
Change LG UltraGear 27GX790B

Compare the ASUS ROG Swift OLED PG27UCWM with

87 of 164 fields differ

Download CSVDownload JSON
  • 52 different values
  • 35 known for one only
  • 34 the same
  • 43 missing for both

Biggest differences

Each bar uses the scale of all 179 monitors.

  1. Refresh rateA: 240HzB: 540HzLG is 300 Hz higher.
  2. Pixel densityA: 166.3ppiB: 110.8ppiASUS is 55.5 ppi higher.
  3. Peak brightness (HDR)A: 1,000nitsB: 1,500nitsLG is 500 nits higher.
  4. Response timeLower is betterA: 0.03msB: 0.02msLG is 0.01 ms lower.
  5. Brightness (typical, SDR)A: 250nitsB: 335nitsLG is 85 nits higher.
  6. Full-screen brightnessA: 250nitsB: 335nitsLG is 85 nits higher.

Refresh rate per resolution

The best rate over any port. Bars run from 0 to 1200 Hz.

3840 × 2160Native for A
A240Hz
BNot listed
2560 × 1440Native for B
ANot listed
B540Hz
2368 × 1332
ANot listed
B540Hz
1920 × 1080
A480Hz
BNot listed
1280 × 720
ANot listed
B720Hz

Size, drawn to scale

Front and side. Solid lines show the stand at its lowest. Dashed lines show it at its highest.

Weight

0 to 15 kg

Weight with stand
A8.1kg
B6.8kg
Weight without stand
A5.4kg
B4.3kg
Box weight
A11.8kg
B9.8kg

All 172 fields

Every value links to where we found it.

AASUS ROG Swift OLED PG27UCWM
BLG UltraGear 27GX790B

General

6 of 8 differ
Series
ROG Swift OLED1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Exact model header on the maker's global spec page.
UltraGear1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026INFO: Product name UltraGear
Model numbers
PG27UCWM, 90LM0CY1-B019711Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Header names PG27UCWM. The ordering code 90LM0CY1-B01971 is in the page data of the same product. The ASUS US store sells ordering code 90LM0CY0-B019B1, which is not stored because the maker pages do not show it as a different configuration.
27GX790B-B, 27GX790B-B.AUS, 27GX790B-B.AEU, 27GX790B-B.AEK, 27GX790B-B.AHK1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026Regional suffixes from the LG UK, DE, HK and US pages2Maker product pagelg.com/de/monitore/gaming/27gx790b-bRead 30 September 20263Maker product pagelg.com/hk_en/monitors/gaming/27gx790b-bRead 30 September 20264Maker spec sheet (PDF)files.bbystatic.com/YZOOI7fCZc/T/bYmkv5jCA==/f3cd232b-3198-4b7a-9903-5aed19b96302.pdfRead 30 September 2026
GTIN / EAN
47116365058579Retailer pagegrosbill.com/asus-rog-swift-pg27ucwm-169893Read 14 October 2026EAN 4711636505857 for manufacturer reference 90LM0CY1-B01971. hinta.fi lists the same EAN and code. No UPC found for the US ordering code.
195174137055, 8806096678008, 8806096736500, 88060966713131Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 20268806096736500 on this UK page (27GX790B-B.AEK). The DE, HK and US codes come from the other sources2Maker product pagelg.com/de/monitore/gaming/27gx790b-bRead 30 September 2026EAN 8806096678008 for SKU 27GX790B-B.AEU3Maker product pagelg.com/hk_en/monitors/gaming/27gx790b-bRead 30 September 2026EAN 8806096671313 for SKU 27GX790B-B.AHK4Maker spec sheet (PDF)files.bbystatic.com/YZOOI7fCZc/T/bYmkv5jCA==/f3cd232b-3198-4b7a-9903-5aed19b96302.pdfRead 30 September 2026UPC 195174137055
Announced
4 January 20267Press releaserog.asus.com/ca-en/articles/gaming-monitors/rgb-stripe-pixel-oled-tech-debuts-in-the-rog-swift-pg34wcdn-xg34wcdms-pg27ucwmRead 14 October 2026Maker CES article dated 4 January 2026 introduces the PG27UCWM. It gives no price or date and says the monitors are on their way.
December 20258Reviewtftcentral.co.uk/news/lg-27gx790b-is-unleashed-with-27-540hz-4th-gen-woled-panel-and-720hz-dual-mode-supportRead 30 September 2026China launch reported 2025-12-10
Status
Available8Maker product pageeshop.asus.com/us/90lm0cy0-b019b1-rog-swift-oled-pg27ucwm.htmlRead 14 October 2026ASUS US store lists the exact model as in stock and for sale at 1,199 USD (current store price, not a launch MSRP).
Available1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026On sale at 599.98 GBP (list 899.99 GBP) on the date accessed
Predecessor
Not available
LG UltraGear 27GX790A11Reviewrtings.com/monitor/reviews/lg/27gx790b-bRead 30 September 2026RTINGS says the 27GX790B-B is a newer version of the 27GX790A-B with a higher native refresh rate.
Successor
Not available
Not available
Launch price (US)
Not available
$999.9910Press releaselgusnewsroom.com/press-release/the-ultragear-gx7-is-changing-the-game-as-lgs-fastest-and-brightest-oled-gaming-monitor-to-dateRead 30 September 2026January 6, 2026 U.S. rollout announcement: pre-order retail price $999.99.
Launch price (EU)
€1,249.911Reviewguru3d.com/review/asus-rog-swift-oled-pg27ucwm-240-480-hz-gaming-monitor-reviewRead 14 October 2026Page 1: recommended price 1,249.90 EUR including VAT, written as an approximate European recommended price. Tom's Hardware gives 1,099 USD as a starting price while the ASUS US store sells at 1,199 USD, so no USD price is stored.
Not available
Markets
US, EU8Maker product pageeshop.asus.com/us/90lm0cy0-b019b1-rog-swift-oled-pg27ucwm.htmlRead 14 October 2026US from the ASUS US store, EU from the EPREL registration and European retailers.
US, DE, GB, HK1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026GB from this page, DE and HK from LG Germany and LG Hong Kong, US from the LG US spec sheet2Maker product pagelg.com/de/monitore/gaming/27gx790b-bRead 30 September 20263Maker product pagelg.com/hk_en/monitors/gaming/27gx790b-bRead 30 September 20264Maker spec sheet (PDF)files.bbystatic.com/YZOOI7fCZc/T/bYmkv5jCA==/f3cd232b-3198-4b7a-9903-5aed19b96302.pdfRead 30 September 2026
Colours
Black3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026Specifications table Chassis Colors Black.
Not available
Segment
Gaming1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Maker Gaming Monitors category.
Gaming1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026

Display

6 of 12 differ
Screen size
26.5in(67.3 cm)1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Panel Size (inch) 26.5. EPREL gives 67.3 cm, which is the same diagonal.
26.5in(67.3 cm)1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026Size [Inch] 26.5. Marketed as 27-inch
Viewable screen diagonal
Not available
Not available
Native resolution
3840 × 2160px1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026
2560 × 1440px1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
Aspect ratio
16:91Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026
16:91Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
Pixel density
166.3ppi
110.8ppi
Pixel pitch
0.153mm1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Pixel Pitch 0.153 mm as published. The published active area divided by 3840 x 2160 gives about 0.1536 mm, so the maker's figure looks truncated. Stored as published.
0.2292mm1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
Active display area
Width589.97Height331.7mm(23.2 × 13.1 in)1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Display Viewing Area (HxV) 589.97 x 331.70 mm, listed here as width x height. The manual's pixel format line says 26.5 inch (674.0 mm), which is a smaller diagonal than this area implies, so the area is stored as the maker page states it.
Not available
Curved
No11Reviewguru3d.com/review/asus-rog-swift-oled-pg27ucwm-240-480-hz-gaming-monitor-reviewRead 14 October 2026Page 3: the display is completely flat. No curvature radius is published.
No8Reviewtftcentral.co.uk/news/lg-27gx790b-is-unleashed-with-27-540hz-4th-gen-woled-panel-and-720hz-dual-mode-supportRead 30 September 2026Flat format
Curvature radius
Not available
Not available
Screen surface
Glossy1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Display Surface Glossy (TrueBlack Glossy).
Matte8Reviewtftcentral.co.uk/news/lg-27gx790b-is-unleashed-with-27-540hz-4th-gen-woled-panel-and-720hz-dual-mode-supportRead 30 September 2026Standard matte anti-glare. RTINGS also calls the coating matte
Anti-reflection coating
TrueBlack Glossy2Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwmRead 14 October 2026TrueBlack Glossy zero-haze optical layer with an anti-reflective stack. Exact maker name stored.
Not available
Touchscreen
Not available
Not available

Panel

14 of 31 differ
Panel type
WOLED1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Panel Type WOLED.
WOLED8Reviewtftcentral.co.uk/news/lg-27gx790b-is-unleashed-with-27-540hz-4th-gen-woled-panel-and-720hz-dual-mode-supportRead 30 September 2026LG Display 4th-Gen WOLED, Primary RGB Tandem
Panel type (as published)
Tandem RGB OLED1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Panel Technology Tandem RGB OLED.
Primary RGB Tandem OLED7Press releaselgusnewsroom.com/press-release/lg-unveils-ultragear-evo-redefining-5k-gaming-with-worlds-first-ai-upscaling-technologyRead 30 September 2026QHD Primary RGB Tandem OLED display. Global sales from the opening day of CES 2026
Backlight
None (self-emissive)3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026Product is OLED, which is self-emissive. The manual spec table labels the Backlight Type row as RGB stripe, which is a pixel layout and is not stored as a backlight.
None (self-emissive)8Reviewtftcentral.co.uk/news/lg-27gx790b-is-unleashed-with-27-540hz-4th-gen-woled-panel-and-720hz-dual-mode-supportRead 30 September 2026
Local dimming
Not available
Not available
Dimming zones
Not available
Not available
Panel maker
LG Display10Press articletftcentral.co.uk/news/asus-unveil-the-rog-swift-pg27ucwm-with-a-27-4k-tandem-woled-panel-and-rgb-stripe-pixel-layoutRead 14 October 2026Names LG Display as the panel maker. The panel model number is not given.
LG Display8Reviewtftcentral.co.uk/news/lg-27gx790b-is-unleashed-with-27-540hz-4th-gen-woled-panel-and-720hz-dual-mode-supportRead 30 September 2026
Panel part number
Not available
Not available
Panel generation
4th Gen Primary RGB Tandem WOLED10Press articletftcentral.co.uk/news/asus-unveil-the-rog-swift-pg27ucwm-with-a-27-4k-tandem-woled-panel-and-rgb-stripe-pixel-layoutRead 14 October 2026Names a 4th Gen Primary RGB Tandem WOLED panel, which LG Display now calls Tandem WOLED.
4th Gen8Reviewtftcentral.co.uk/news/lg-27gx790b-is-unleashed-with-27-540hz-4th-gen-woled-panel-and-720hz-dual-mode-supportRead 30 September 2026
Subpixel layout
RGB stripe2Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwmRead 14 October 2026States true RGB Stripe sub-pixel arrangement and removal of the white subpixel of standard WOLED.
Not available
Colour depth
10bits1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Display Colors 1073.7M (10 bit).
10bits5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 20268-bit/ 10-bit color is supported. Method not stated
Colour depth method
Native12Reviewtomshardware.com/monitors/gaming-monitors/asus-rog-swift-pg27ucwm-27-inch-4k-oled-gaming-monitor-reviewRead 14 October 2026Spec table row Native Color Depth and Gamut: 10-bit / DCI-P3. The maker page says 10 bit without the word native.
Not available
Displayable colours
1.07 billion1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Published as 1073.7M. Normalized to 1.07 billion.
1.07 billion1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026Published as 1.07B
sRGB coverage
Not available
Not available
DCI-P3 coverage
99%1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Color Space (DCI-P3) 99%. The manual says 99% (Typ.). The reference chromaticity is not stated. The 130% sRGB figure is gamut volume and is not stored as coverage.
99.5%3Maker product pagelg.com/hk_en/monitors/gaming/27gx790b-bRead 30 September 2026Color Gamut (Typ.) DCI-P3 99.5% (CIE1976), Min. 94.0%
Adobe RGB coverage
Not available
Not available
Rec. 2020 coverage
Not available
Not available
NTSC coverage
Not available
Not available
Factory calibrated
Yes2Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwmRead 14 October 2026FAQ says ROG OLED monitors are factory calibrated. Spec page lists a Color Calibration E-report through DisplayWidget Center. Tom's Hardware confirms factory calibration data stored in firmware. No paper report is stated.
Yes1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
Claimed Delta E
22Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwmRead 14 October 2026Feature banner reads 99% DCI-P3 and Delta E under 2. Stored as 2 with the less-than qualifier. Average or maximum is not stated.
Not available
Paper calibration report in box
Not available
Not available
Hardware calibration support
Not available
Yes1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
Static contrast ratio
1,500,000:11Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Contrast Ratio (Typ.) 1,500,000:1.
1,500,000:11Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026Contrast Ratio (Typ.) 1500000:1, Min. 1200000:1
Brightness (typical, SDR)
250nits1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Brightness (Typ.) 250 cd/m2. The manual spec table adds 450 nits (peak) without a condition, which is not stored.
335nits1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026Brightness (Typ.) 335 cd/m2, Min. 300 cd/m2
Brightness (maker minimum)
Not available
300nits1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026DISPLAY: Brightness (Min.) 300 cd/m². Minimum guaranteed specification, not the lowest brightness setting.
Peak brightness (HDR)
1,000nits1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Brightness (HDR, Peak) 1,000 cd/m2. The page note says peak brightness may vary due to color pre-calibration. The test window is not stated on the maker page and is left out.
1,500nits8Reviewtftcentral.co.uk/news/lg-27gx790b-is-unleashed-with-27-540hz-4th-gen-woled-panel-and-720hz-dual-mode-supportRead 30 September 20261500 nits (1.5% APL)
HDR peak test window
Not available
1.5%8Reviewtftcentral.co.uk/news/lg-27gx790b-is-unleashed-with-27-540hz-4th-gen-woled-panel-and-720hz-dual-mode-supportRead 30 September 2026Stated as 1.5% APL
Full-screen brightness
250nits12Reviewtomshardware.com/monitors/gaming-monitors/asus-rog-swift-pg27ucwm-27-inch-4k-oled-gaming-monitor-reviewRead 14 October 2026Spec table Brightness (mfr) 250 nits full screen and 1,000 nits at a 3% window. The panel maker figures quoted by TFTCentral are 1,000 nits at 1.5% APL for HDR peak and 250 nits at 100% APL, so the peak window is stated two ways and is not stored.
335nits8Reviewtftcentral.co.uk/news/lg-27gx790b-is-unleashed-with-27-540hz-4th-gen-woled-panel-and-720hz-dual-mode-supportRead 30 September 2026335 nits for 100% APL
HDR formats
HDR10, Dolby Vision1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026HDR Support lists HDR10 and Dolby Vision as two rows. HDR10+ is not listed by the maker.
HDR101Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
HDR certification
DisplayHDR True Black 4001Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Certificate list VESA DisplayHDR 400 True Black.
DisplayHDR True Black 5001Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
Viewing angle (horizontal)
178°1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Viewing Angle (CR 10 or more) 178 / 178.
178°1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
Viewing angle (vertical)
178°1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Viewing Angle (CR 10 or more) 178 / 178.
178°1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026

Refresh rate and motion

13 of 22 differ
Refresh rate per resolution and port
AASUS ROG Swift OLED PG27UCWM
Refresh rate per resolution and port. The top rate is in bold.
ResolutionHDMI 2.1DisplayPort 2.1a UHBR20USB-C
3840 × 2160Native240Hz240Hz240Hz
1920 × 1080480Hz480Hz480Hz
Source2Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwmRead 14 October 2026Feature page: DisplayPort 2.1a UHBR20 with full 80 Gbps supports 4K at 240 Hz without compression. Dual Mode switches between 4K at 240 Hz and FHD at 480 Hz. Maker spec page Signal Frequency gives 48 to 240 Hz vertical for HDMI, USB-C and DisplayPort at native resolution. The manual says Frame Rate Boost enables up to 1920 x 1080 at 480 Hz, and its timing table lists 3840 x 2160 at 240 Hz and 1920 x 1080 at 480 Hz as accepted on HDMI and on DP and USB-C. Bit depth, chroma and DSC for HDMI and USB-C are not stated. The manual's Type-C Bandwidth setting limits USB 3.2 mode to 3840 x 2160 at 120 Hz, so the USB-C maxima need the other bandwidth setting. HDMI 4K at 240 Hz needs a signal beyond uncompressed 48 Gbps, so no DSC value is stored for it.
BLG UltraGear 27GX790B
Refresh rate per resolution and port. The top rate is in bold.
ResolutionHDMI 2.1DisplayPort 2.1USB-C
2560 × 1440Native540Hz540HzDSC540HzDSC
2368 × 1332540Hz540Hz540Hz
1280 × 720720Hz720Hz720Hz
Source5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 2026Support Mode pages 24-27: native QHD 540, HD 720 Dual-Mode and 2368×1332@540 in 24.5-inch crop mode. DP/USB-C share one table. QHD 540 recommended timing requires Input Compatibility 1.4(DSC) or 2.1(DSC), including USB-C. HDMI native 540 uses 2.1(PC). 1080p240 and HDMI 4K120 are preset signals, not established maxima.
Max refresh rate
480Hz
720Hz
Max refresh rate at native resolution
240Hz
540Hz
Max refresh rate over DisplayPort
240Hz
540Hz
Max refresh rate over HDMI
240Hz
540Hz
Max refresh rate over USB-C
240Hz
540Hz
Max refresh rate at 10-bit
Not available
Not available
Native refresh rate
240Hz1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Refresh Rate (max) 240 Hz at the native 3840 x 2160. The 480 Hz mode is the Full HD dual mode.
540Hz1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
Overclocked refresh rate
Not available
Not available
Dual mode
Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Dual Mode Yes, 4K at 240 Hz or FHD at 480 Hz.
Yes4Maker spec sheet (PDF)files.bbystatic.com/YZOOI7fCZc/T/bYmkv5jCA==/f3cd232b-3198-4b7a-9903-5aed19b96302.pdfRead 30 September 2026VESA Dual-Mode QHD 540Hz / HD 720Hz
Minimum fixed refresh rate
Not available
Not available
Adaptive sync technologies
Adaptive-Sync, VESA AdaptiveSync Display, FreeSync Premium Pro, G-SYNC Compatible1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026VRR Technology Yes (Adaptive-Sync). Certificate list names AMD FreeSync Premium Pro, G-SYNC Compatible and VESA AdaptiveSync Display. The ASUS US store page lists G-SYNC Compatible and VESA AdaptiveSync Display 480Hz but not FreeSync Premium Pro.
VESA AdaptiveSync Display, HDMI VRR, FreeSync Premium Pro, G-SYNC Compatible, Adaptive-Sync1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026Key Features explicitly says VESA certified AdaptiveSync, NVIDIA G-SYNC Compatible and AMD FreeSync Premium Pro. This proves the named VESA certification, separately from generic DP protocol support.5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 2026Adaptive-Sync/VRR section explicitly says supported interfaces DisplayPort(Adaptive-Sync), HDMI(VRR). This backs generic adaptive_sync and hdmi_vrr, not VESA certification.
VRR range per port
AASUS ROG Swift OLED PG27UCWM
Min (Hz)Max (Hz)
48240
48480
Source3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026Gaming menu, Variable Refresh Rate: can only be activated within 48 to 240 Hz when Frame Rate Boost is off and 48 to 480 Hz when Frame Rate Boost is on. The manual does not split the range by port, so no input is stored. First row is Frame Rate Boost off, second row is on.
BLG UltraGear 27GX790B
Not available
Low framerate compensation
Yes15Maker product pageamd.com/en/resources/support-articles/faqs/DH3-013.htmlRead 14 October 2026AMD defines FreeSync Premium Pro as supporting low framerate compensation. The maker lists AMD FreeSync Premium Pro for this model. A compatible GPU and enabled mode are required.
Yes1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026Exact-model maker claim for FreeSync Premium Pro supplies the product tier. AMD official definition supplies its required LFC feature. Compatible GPU/mode conditions apply.13Maker product pageamd.com/en/resources/support-articles/faqs/DH3-013.htmlRead 30 September 2026Official tier definition explicitly includes LFC in FreeSync Premium Pro. Applies when a compatible AMD GPU and supported FreeSync mode are enabled. No all-input VRR-range claim is inferred.
Response time (maker GtG claim)
0.03ms1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Response Time 0.03 ms (GTG). The announcement calls it a minimum GTG response time.
0.02ms1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
Response time (maker MPRT claim)
Not available
Not available
Overdrive settings
Not available
Not available
Motion blur reduction
Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Extreme Low Motion Blur Yes.
Not available
Blur-reduction technology
Extreme Low Motion Blur (ELMB)3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026Gaming menu ELMB Setup. The spec page names it Extreme Low Motion Blur.
Not available
Blur reduction works with VRR
No3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026ELMB can only be activated when Variable Refresh Rate is off, and enabling ELMB turns VRR off. ELMB is available at 120 Hz, or at 120 and 240 Hz in Frame Rate Boost mode.
Not available
Flicker-free (claimed)
Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Flicker free Yes. TUV Flicker-free is on the certificate list.
Yes1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026Eye-comfort section: LG WOLED panel verified Flicker-Free by UL, certificate A196009. This is a panel-level maker claim, not a claim that VRR flicker never occurs.
Black frame insertion
Not available
Not available

Measured

3 of 12 differ
Input lag at maximum refresh rate
Not available
Not available
Input lag at 60 Hz
Not available
Not available
Average response time (measured)
Not available
0.06ms14Reviewchimolog.co/lg-27gx790bRead 8 October 2026Reviewer-purchased Japanese 27GX790B-B, the same marketed model as the catalog regional rows. Dual-Mode at 1280 × 720 and 720 Hz gives a mean of 0.06 ms across 30 grey transitions, measured from 10% to 90%. The text also gives 61 microseconds before rounding. No separate overdrive setting is reported. Native 2560 × 1440 at 540 Hz gives a separate 0.08 ms mean. The optical-sensor and oscilloscope method is linked in the article. These are sample measurements. Regional warranty and bundle claims are not transferred.
Overshoot (measured)
Not available
Not available
Contrast ratio (measured)
Not available
Not available
SDR brightness (measured)
278nits13Measurementtomshardware.com/monitors/gaming-monitors/asus-rog-swift-pg27ucwm-27-inch-4k-oled-gaming-monitor-review/3Read 14 October 2026Page 3: Racing mode, Power Setting on Performance, brightness slider at maximum, Uniform Brightness on. Full field 278 nits, and the 25% window also read 278 nits. With Uniform Brightness off a 25% window reached just under 500 nits. Guru3D measured lower SDR maxima (229.6 nits at 100% in sRGB Calibration mode) with default settings. The ASUS manual says the default Power Saving mode limits brightness.
249nits9Reviewtomsguide.com/computing/monitors/lg-ultragear-27gx790b-b-reviewRead 30 September 2026249 nits SDR in the Max Brightness mode. Window size not stated. 561 nits HDR on a 10% window
HDR brightness in a real scene (measured)
Not available
Not available
PWM flicker frequency (measured)
Not available
Not available
VRR range (measured)
Not available
Not available
Colour accuracy (measured Delta E)
1.0514Measurementtomshardware.com/monitors/gaming-monitors/asus-rog-swift-pg27ucwm-27-inch-4k-oled-gaming-monitor-review/4Read 14 October 2026Page 4: Racing picture mode, uncalibrated, Calman gamut test, 1.05 dE average color gamut error. The Delta E formula is not stated on the page. Guru3D measured an average 2.37 in Racing mode with a DataColor Spyder, a different instrument and patch set, so the two are not the same test.
Not available
Gray uniformity (measured)
Not available
Not available
Reflections (measured)
Not available
Not available

Connectivity

12 of 19 differ
Video inputs
AASUS ROG Swift OLED PG27UCWM
TypeVersionCountMax bandwidth (Gbps)
DisplayPort2.1a UHBR20180
HDMI2.1248
USB-CNot available1Not available
Source2Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwmRead 14 October 2026Rich Connectivity: DisplayPort 2.1a UHBR20 with full 80 Gbps, HDMI 2.1 FRL 48 Gbps. Counts from the manual I/O line: HDMI v2.1 x2, DisplayPort v2.1 x1, USB Type-C x1. DSC and HDCP are not stored.
BLG UltraGear 27GX790B
TypeVersionCountDSC
HDMI2.12Not available
DisplayPort2.11Yes
USB-CNot available1Not available
Source1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026HDMI YES(2ea), DisplayPort YES(1ea), DP Version 2.1, USB-C Yes. HDMI 2.1 from the accessory and US spec sheet. DSC per the manual timing table4Maker spec sheet (PDF)files.bbystatic.com/YZOOI7fCZc/T/bYmkv5jCA==/f3cd232b-3198-4b7a-9903-5aed19b96302.pdfRead 30 September 2026HDMI Yes x 2, Supports FRL as compliant with HDMI 2.1. DisplayPort Yes x 1, DP Version 2.1. USB Type-C Yes x 15Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 2026DisplayPort needs DSC for 2560x1440 at 540 Hz (Input Compatibility 1.4(DSC) or 2.1(DSC))
HDMI ports
2
2
DisplayPort ports
1
1
Highest HDMI version
2.1
2.1
Highest DisplayPort version
2.1a UHBR20
2.1
HDMI features
Not available
VRR5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 2026HDMI (VRR)
USB-C video (DP Alt Mode)
Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026I/O Ports USB-C x 1 (DP Alt Mode).
Yes5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 2026DP Alternate Mode (DP over USB-C) are supported via USB-C Port
USB-C power delivered
90W1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026USB-C Power Delivery 90 W.
5W11Reviewrtings.com/monitor/reviews/lg/27gx790b-bRead 30 September 2026Public Office verdict explicitly says USB-C is limited to 5 W Power Delivery. Detailed test cells are membership-locked and were not used.
Thunderbolt
Not available
Not available
USB upstream ports
AASUS ROG Swift OLED PG27UCWM
ConnectorUSB versionCount
USB-B3.2 Gen 11
USB-CNot available1
Source3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026Back view and I/O line: USB Type-B x1, USB 3.2 Gen 1 upstream. The Type-C port also carries USB data to a host (Type-C Bandwidth setting offers USB 2.0 or USB 3.2, and Smart KVM selects it). No USB revision is stated for the Type-C connection.
BLG UltraGear 27GX790B
ConnectorCount
USB-C1
Source1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026USB Upstream Port YES(via USB-C)
USB downstream hub ports
AASUS ROG Swift OLED PG27UCWM
ConnectorUSB versionCount
USB-A3.2 Gen 13
Source3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026I/O line USB Type-A (5V / 0.9A) x3. Back view lists them as USB 3.2 Gen 1 downstream ports.
BLG UltraGear 27GX790B
ConnectorUSB versionCount
USB-A3.02
Source1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026USB Downstream Port YES(2ea/ver3.0). USB-A per TFTCentral and Tom's Guide
KVM switch
Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026KVM Switch Yes.
Not available
Daisy chain (MST)
Not available
Not available
Ethernet
No3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026The complete I/O line has no Ethernet port.
Not available
3.5 mm headphone output
Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Earphone jack Yes. Tom's Hardware names it as a 3.5 mm jack.
Yes1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
3.5 mm microphone input
No3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026The complete back view and I/O line list only an earphone jack for audio. No microphone input.
Yes1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026Headphone out 4-pole (Sound+Mic), one combined jack
Optical out
No3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026The complete I/O line has no optical or S/PDIF output.
Not available
Picture in picture
Yes3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026OSD PIP/PBP menu has PIP Size (Small, Middle, Large). PIP/PBP turns off VRR, ELMB, Aspect Control and DSC.
Not available
Picture by picture
Yes3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026OSD PIP/PBP Mode selects the split screen type, and Smart KVM enables PBP automatically.
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-pg27ucwm/specRead 14 October 2026Speaker No.
No14Reviewchimolog.co/lg-27gx790bRead 8 October 2026The exact review lists no built-in speakers. Four-pole headphone output and the power-on buzzer are separate features.
Number of speakers
Not available
Not available
Speaker power per channel
Not available
Not available
Webcam
Not available
Not available
Microphone
Not available
Not available

Ergonomics and controls

9 of 15 differ
Stand height adjustment
110mm1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Height Adjustment 0 to 110 mm.
130mm5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 2026Max. 130.0 mm
Tilt
Forward5°Backward20°1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Tilt +20 to -5 degrees, stored as 20 backward and 5 forward. The manual gives -5 to 20.
Forward5°Backward21°5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 2026-5 to 21 degrees
Swivel
Left30°Right30°1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Swivel +30 to -30 degrees.
Left30°Right30°5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 202630 degrees to the left or to the right
Pivot
Counterclockwise90°Clockwise90°1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Pivot +90 to -90 degrees.
Counterclockwise90°5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 202690 degrees counter-clockwise
Removable stand
Yes3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026Chapter 1.4 Detaching the arm/stand: push the locking clips and slide the stand out.
Yes5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 2026Wall mount installation with the stand removed
VESA mount
100 x 1001Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026VESA Wall Mounting 100x100 mm.
100 x 1001Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
VESA adapter needed
Yes3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026The package list names a Wall Mount Kit. Tom's Hardware describes a bracket that snaps onto the panel to make the 100 mm VESA mount and Guru3D lists a 100 x 100 mm VESA adapter in the box. The manual text at 1.4 says the VESA wall mount kit is purchased separately, which conflicts with its own package list. Stored as required, since the kit is needed and listed in the box.
Not available
Security lock slot
Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Kensington Lock Yes.
Yes5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 2026
On-screen menu controls
Joystick, Buttons, Software3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026Front view and controls: five-way control button, close button and power button. ASUS DisplayWidget Center adjusts monitor settings from the desktop. Tom's Hardware calls the control a joystick.
Joystick, Buttons5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 2026Product and Button Description, page 9: joystick button and separate Dual mode button.
Desktop software
ASUS DisplayWidget Center1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026DisplayWidget Yes, DisplayWidget Center.
LG Switch5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 2026Software list: Monitor Driver / LG Switch / LG Calibration Studio / Dual Controller
User firmware updates
Yes2Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwmRead 14 October 2026DisplayWidget Center offers firmware update notifications and a direct update option.
Not available
Ambient light sensor
Not available
Not available
Presence sensor
Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Proximity Sensor, Neo Proximity Sensor. It detects the user's distance and blanks the screen when the user leaves. It is not an ambient light sensor.
Not available
RGB lighting
Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Lighting effect (Aura) Aura Sync. The manual has Aura RGB with selectable colours.
Yes3Maker product pagelg.com/hk_en/monitors/gaming/27gx790b-bRead 30 September 2026RGB LED Lighting: Unity Hexagon Lighting
Gaming menu features
Frame Rate Boost, Variable Refresh Rate, ELMB, GamePlus, FPS Counter, Crosshair, Dynamic Crosshair, Sniper, Timer, Stopwatch, Display Alignment, GameVisual, Shadow Boost, Dynamic Shadow Boost, Aspect Control, AI Visual, Uniform Brightness, OLED Anti-Flicker2Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwmRead 14 October 2026Names from the feature page and manual: Frame Rate Boost, GamePlus tools, GameVisual, Shadow Boost, AI Assistant (AI Visual, Dynamic Crosshair, Dynamic Shadow Boost), Aspect Control, Uniform Brightness and OLED Anti-Flicker.
Black Stabilizer, Crosshair, FPS Counter, Dynamic Action Sync, User-defined Key, Dual-Mode1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026FEATURES list. Dual-Mode and User-defined Key names from the manual5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 2026

OLED care

3 of 3 differ
OLED care
Neo Proximity Sensor, Pixel Cleaning, Screen Move, Screen Saver, Auto Logo Brightness, Taskbar Detection, Outer Dimming Control, Global Dimming Control, Target Mode, Boundary Detection2Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwmRead 14 October 2026OLED Care Pro section names Neo Proximity Sensor, Pixel Cleaning, Screen Move, Screen Saver, Logo brightness adjustment, Taskbar detection, Outer dimming control, Global dimming control, Target mode and Boundary Detection.
OLED Screen Saver, OLED Image Cleaning5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 2026
Burn-in covered by warranty
Yes1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Warranty explicitly includes panel burn-in.
Not available
Burn-in warranty length
3years1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Warranty 3 years including panel burn-in.
Not available

Dimensions and weight

6 of 7 differ
Dimensions with stand
Width606Height (lowest)438Height (highest)548Depth256mm(23.9 × 17.2 to 21.6 × 10.1 in)1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Spec page gives 60.6 x 54.8 x 25.6 cm. The manual gives 606 x 548 x 256 mm (highest) and 606 x 438 x 256 mm (lowest), so the manual is used for the height range. Maker marks all dimensions and weights as estimates that vary by region.
Width605.2Height (lowest)397.6Height (highest)527.6Depth220mm(23.8 × 15.7 to 20.8 × 8.7 in)1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026605.2x527.6x220(Up)/605.2x397.6x220(Down)
Dimensions without stand
Width606Height369Depth63mm(23.9 × 14.5 × 2.5 in)1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Spec page 60.6 x 36.9 x 6.3 cm. The manual gives 606 x 369 x 63 mm.
Width605.2Height351Depth51.2mm(23.8 × 13.8 × 2 in)1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
Stand footprint
Not available
Not available
Weight with stand
8.1kg(17.9 lb)1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Net Weight with Stand 8.1 kg (estimate, varies by region).
6.8kg(15 lb)1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
Weight without stand
5.4kg(11.9 lb)1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Net Weight without Stand 5.4 kg (estimate, varies by region).
4.3kg(9.5 lb)1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
Box dimensions
Width860Height490Depth163mm(33.9 × 19.3 × 6.4 in)1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Box Dimension (W x H x D) 86.0 x 49.00 x 16.3 cm. The manual gives 860 x 490 x 163 mm.
Width790Height182Depth496mm(31.1 × 7.2 × 19.5 in)1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026Published as Dimension in Shiping (W x H x D) 790x182x496. Height and depth look swapped, stored as published
Box weight
11.8kg(26 lb)1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Gross Weight 11.8 kg (estimate, varies by region).
9.8kg(21.6 lb)1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026

Power

7 of 13 differ
Power supply
Internal4EU energy label (EPREL)eprel.ec.europa.eu/fiches/electronicdisplays/Fiche_2688398_EN.pdfRead 14 October 2026Row 24 power supply type Internal.
External adapter1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
Adapter rating
Not available
110W5Owner's manualgscs-b2c.lge.com/open/downloadFileRead 8 October 2026Printed page 23 names ADS-120QL-19A-3 190110E and MS-Z5790R190-110D0-E adapters with rated output 19 V at 5.79 A. These output ratings corroborate the reviewed adapter. The stored 110 W is the review explicitly published maximum adapter wattage. The monitor 19 V at 5.0 A input rating is separate and is not maximum consumption.14Reviewchimolog.co/lg-27gx790bRead 8 October 2026The reviewed supplied adapter is explicitly described as maximum 110 W with 19.0 V × 5.79 A output. The exact-model maker manual independently gives the same output rating for its two named adapter models. Japanese PSE registration and box contents are not transferred.
Input voltage
100-240 V AC, 50/60 Hz1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Voltage 100-240 V, 50/60 Hz.
100-240 V AC, 50/60 Hz1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026
Power use (typical)
Not available
25W3Maker product pagelg.com/hk_en/monitors/gaming/27gx790b-bRead 30 September 2026Power Consumption (Typ.) 25W. Not listed on the UK page
Power use (max)
Not available
46.32W3Maker product pagelg.com/hk_en/monitors/gaming/27gx790b-bRead 30 September 2026Power Consumption (Max.) 46.32W
Power use SDR (EU label)
25.3W4EU energy label (EPREL)eprel.ec.europa.eu/fiches/electronicdisplays/Fiche_2688398_EN.pdfRead 14 October 2026Row 4 on mode power demand in SDR 25.3 W.
24.7W6EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/2498871Read 30 September 2026
Power use HDR (EU label)
27W4EU energy label (EPREL)eprel.ec.europa.eu/fiches/electronicdisplays/Fiche_2688398_EN.pdfRead 14 October 2026Row 6 on mode power demand in HDR 27.0 W.
28.5W6EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/2498871Read 30 September 2026
Standby power
0.5W4EU energy label (EPREL)eprel.ec.europa.eu/fiches/electronicdisplays/Fiche_2688398_EN.pdfRead 14 October 2026Row 8 standby 0.5 W. The manual says less than 0.5 W.
0.5W6EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/2498871Read 30 September 2026
Off-mode power
0.3W4EU energy label (EPREL)eprel.ec.europa.eu/fiches/electronicdisplays/Fiche_2688398_EN.pdfRead 14 October 2026Row 7 off mode 0.3 W. The manual says less than 0.3 W.
0.3W6EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/2498871Read 30 September 20260.3 W. The US spec sheet says less than 0.5W
EU energy class SDR
F4EU energy label (EPREL)eprel.ec.europa.eu/fiches/electronicdisplays/Fiche_2688398_EN.pdfRead 14 October 2026Row 3 class F.
F6EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/2498871Read 30 September 2026
EU energy class HDR
G4EU energy label (EPREL)eprel.ec.europa.eu/fiches/electronicdisplays/Fiche_2688398_EN.pdfRead 14 October 2026Row 5 class G.
G6EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/2498871Read 30 September 2026
Energy per 1000 h SDR
25kWh5EU energy label (EPREL)eprel.ec.europa.eu/labels/electronicdisplays/Label_2688398.pdfRead 14 October 2026Printed label 25 kWh/1000h.
25kWh12EU energy label (EPREL)eprel.ec.europa.eu/labels/electronicdisplays/Label_2498871.svgRead 30 September 2026Published energy label SDR kWh/1000h value, read directly from label.
Energy per 1000 h HDR
27kWh5EU energy label (EPREL)eprel.ec.europa.eu/labels/electronicdisplays/Label_2688398.pdfRead 14 October 2026Printed label 27 kWh/1000h.
29kWh12EU energy label (EPREL)eprel.ec.europa.eu/labels/electronicdisplays/Label_2498871.svgRead 30 September 2026Published energy label HDR kWh/1000h value, read directly from label.

Certifications

5 of 9 differ
VESA ClearMR
Not available
21,0004Maker spec sheet (PDF)files.bbystatic.com/YZOOI7fCZc/T/bYmkv5jCA==/f3cd232b-3198-4b7a-9903-5aed19b96302.pdfRead 30 September 2026
VESA AdaptiveSync Display
480Hz1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Certificate list names both VESA AdaptiveSync Display 240Hz and VESA AdaptiveSync Display 480Hz. The higher number is stored.
Not available
TÜV certifications
Flicker-free1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Certificate list TUV Flicker-free.
Not available
Low blue light
Software3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026OSD Blue Light Filter (Level 1 to 4) is a selectable software filter. The maker lists no hardware low-blue-light certificate.
Not available
ENERGY STAR
Not available
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TCO Certified
Not available
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EPEAT
Not available
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Colour certifications
Not available
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Other certifications
FSC MIX1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Certificate list FSC MIX.
UL Verified Perfect Black, UL Verified Perfect Color, UL Discomfort Glare Free, UL Eyesafe 3.0 CPF60, UL Eyesafe 3.0 RPF401Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026Product highlights and eye-comfort section name these UL verifications for the OLED panel. Discomfort Glare Free V563481 (UGR<22), Eyesafe CPF60 V745354, RPF40 V275741. Panel verifications, not a blanket system certification.

In the box

2 of 2 differ
In the box
OLED Monitor, Quick Start Guide, Warranty Card, Power Cord, ROG Pouch, ROG Sticker, Monitor Base, Wall Mount Kit, Microfiber Cloth, USB Type-C cable (optional), HDMI cable (optional), DP cable (optional), USB cable (optional), Feature label (optional)1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Accessories list on the spec page differs by region and names a DisplayPort 2.1 (DP80) cable, HDMI Ultra High Speed Cable, USB 3.2 cable, USB-C cable and a VESA mount kit. The manual package list is stored verbatim.
HDMI cable (ver 2.1), DisplayPort cable (ver 2.1)1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026Published ACCESSORY list names these two included cables. This is the published list, not an assertion of a complete physical inventory.
Cables included
AASUS ROG Swift OLED PG27UCWM
TypeCount
Power Cord1
DisplayPort 2.1 (DP80) cableNot available
HDMI Ultra High Speed CableNot available
USB 3.2 cableNot available
USB-C cableNot available
Source3Owner's manualdlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PG27UCWM/ASUS_PG27UCWM_UM_EN.pdfRead 14 October 2026Package list marks the power cord as standard and the USB-C, HDMI, DP and USB cables as optional. The maker spec page accessories list (varies by region) names the DisplayPort 2.1 (DP80), HDMI Ultra High Speed, USB 3.2 and USB-C cables, and Guru3D and Tom's Hardware found these cables in their boxes. Counts are only stored for the power cord.
BLG UltraGear 27GX790B
Type
HDMI (ver 2.1)
DisplayPort (ver 2.1)
Source1Maker product pagelg.com/uk/monitors/gaming/27gx790b-bRead 30 September 2026ACCESSORY: HDMI YES (ver 2.1), Display Port YES (ver 2.1)

Warranty

1 of 2 differ
Manufacturer warranty (source market)
3years1Maker product pagerog.asus.com/monitors/27-to-31-5-inches/rog-swift-oled-pg27ucwm/specRead 14 October 2026Warranty 3 years (including panel burn-in). Country terms can differ.
2years4Maker spec sheet (PDF)files.bbystatic.com/YZOOI7fCZc/T/bYmkv5jCA==/f3cd232b-3198-4b7a-9903-5aed19b96302.pdfRead 30 September 2026Limited Warranty 2 Year Parts and Labor. Market: US
Dead pixel policy
Not available
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Both are also in the API. Back to all monitors.