Gaming / Monitors

LGGaming monitor
UltraGear 45GX90SA
Released April 2025.2Press releaselg.com/us/press-release/lg-ug-smart-monitor-pr-4-02-2025.pdfRead 5 October 2026Published April 3, 2025. The exact three GX9s models are available to purchase now at LG and authorized retailers. This is actual retail availability, not a preorder date. The earlier Japanese April plan was later delayed. Last checked 16 October 2026.
- Screen size
- 44.5in
- Resolution
- 3440 × 1440
- Refresh rate
- 240Hz
- Panel
- WOLED
101 of 172 fields known.
At a glance
Ports
- 2 HDMI 2.1
- DisplayPort 1.4
- USB-CVideo in
- USB-CTo your computer
- 2 USB-A 2.0
- EthernetNetwork
- Headphone3.5 mm out
General
- Series
- UltraGear OLED1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B product title and gaming category.
- Model numbers
- 45GX90SA-B1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B sold model number. Other regions are not represented as variants.
- GTIN / EAN
- 1951741151141Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo Warranty UPC. European GTINs are not assigned to the U.S. reference.
- Announced
- Not available
- Status
- Not available
- Predecessor
- Not available
- Successor
- Not available
- Launch price (EU)
- Not available
- Markets
- Not available
- Colours
- Not available
Display
- Screen size
- 44.5in(113 cm)1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo Screen Size. The 45-inch class uses the published 44.5-inch panel.
- Viewable screen diagonal
- Not available
- Native resolution
- 3440 × 1440px1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo Native Resolution. This smart model is WQHD, not the 5K2K GX950A.
- Pixel density
- 83.8ppi
- Active display area
- Width1,042Height436mm(41 × 17.2 in)5Maker spec sheet (PDF)lg.com/content/dam/channel/wcms/jp/catalog/pdf/202503_monitor_ultragear.pdfRead 5 October 2026Exact column active panel area. Curved panel surface width can exceed external body width. Whole-mm source precision is retained.
- Curvature radius
- 800mm1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo Curvature 800R. Fixed curvature, not a bendable panel.
- Screen surface
- Not available
- Anti-reflection coating
- Anti-Glare, Low-Reflection of the front polarizer1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo Surface Treatment. This alone does not establish a matte or glossy classification.
- Touchscreen
- Not available
Panel
- Panel type
- WOLED4Maker product pagelg.com/uk/monitors/gaming/45gx90sa-bRead 5 October 2026Exact-model feature body explicitly names LG WOLED.
- Panel type (as published)
- WOLED4Maker product pagelg.com/uk/monitors/gaming/45gx90sa-bRead 5 October 2026Exact maker technology name.
- Backlight
- None (self-emissive)4Maker product pagelg.com/uk/monitors/gaming/45gx90sa-bRead 5 October 2026The producer WOLED description identifies a self-emissive OLED, not an LCD backlight.
- Local dimming
- Not available
- Dimming zones
- Not available
- Panel maker
- Not available
- Panel part number
- Not available
- Panel generation
- Not available
- Subpixel layout
- Not available
- Colour depth method
- Not available
- Displayable colours
- 1.07 billion1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo number of colours 1.07B. Native colour depth method is unstated.
- sRGB coverage
- Not available
- Adobe RGB coverage
- Not available
- Rec. 2020 coverage
- Not available
- NTSC coverage
- Not available
- Claimed Delta E
- Not available
- Paper calibration report in box
- Not available
- Hardware calibration support
- No4Maker product pagelg.com/uk/monitors/gaming/45gx90sa-bRead 5 October 2026Exact table HW Calibration No. Calibration Studio is also No. Factory calibration is a separate claim. The U.S. 45-inch True Color Pro feature is inconsistent and not adopted.
- Static contrast ratio
- 1,500,000:11Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo typical 1.5M:1. The feature explanation uses 25% APL. Infinite reviewer contrast has no finite numeric representation.
- Brightness (typical, SDR)
- 275nits1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo typical SDR 275 cd/m². Measured or minimum brightness is separate.
- Brightness (maker minimum)
- 250nits1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo minimum guaranteed 250 cd/m². This is not the minimum adjustable brightness.
- Peak brightness (HDR)
- 1,300nits1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo HDR peak 1300 cd/m² at 1.5% average picture level. Not a full-screen or sustained measurement.
- HDR peak test window
- 1.5%1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo explicitly uses 1.5% APL, not necessarily a white-window percentage.
- Full-screen brightness
- 275nits4Maker product pagelg.com/uk/monitors/gaming/45gx90sa-bRead 5 October 2026Exact feature body states standard luminance 275 nits at 100% APL, separate from peak 1300 nits at 1.5% APL.
- HDR certification
- DisplayHDR True Black 4001Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo DisplayHDR True Black 400. Not the LCD DisplayHDR 400 tier.
Refresh rate and motion
- Refresh rate per resolution and port
Refresh rate per resolution and port. The top rate is in bold. Resolution HDMI 2.1 DisplayPort 1.4 USB-C 3440 × 1440Native 240Hz 240HzDSC 240HzDSC Show as source table
Width (px) Height (px) Input Input version Maximum accepted rate (Hz) DSC 3440 1440 HDMI 2.1 240 Not available 3440 1440 DisplayPort 1.4 240 Yes 3440 1440 USB-C Not available 240 Yes - Max refresh rate
- 240Hz
- Max refresh rate at native resolution
- 240Hz
- Max refresh rate over DisplayPort
- 240Hz
- Max refresh rate over HDMI
- 240Hz
- Max refresh rate over USB-C
- 240Hz
- Max refresh rate at 10-bit
- Not available
- Native refresh rate
- 240Hz1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo native 240 Hz. No faster dual mode or overclock is inherited.
- Overclocked refresh rate
- Not available
- Dual mode
- Not available
- Minimum fixed refresh rate
- Not available
- Adaptive sync technologies
- FreeSync Premium, G-SYNC Compatible, VESA AdaptiveSync Display1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo names FreeSync Premium, G-SYNC Compatible and VESA Adaptive Sync. No native G-SYNC module or FreeSync Premium Pro is inferred.
- VRR range per port
- Not available
- Low framerate compensation
- Yes8Maker product pageamd.com/en/products/graphics/technologies/freesync.htmlRead 5 October 2026AMD officially requires LFC for FreeSync Premium-certified displays. The exact U.S. monitor has that named certification. No port-specific VRR interval is inferred.
- Response time (maker GtG claim)
- 0.03ms1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo 0.03 ms GtG at Faster. Not a mean measured transition time.
- Response time (maker MPRT claim)
- Not available
- Overdrive settings
- Not available
- Motion blur reduction
- No4Maker product pagelg.com/uk/monitors/gaming/45gx90sa-bRead 5 October 2026Exact table Motion Blur Reduction Tech No. Fast OLED transitions do not themselves establish strobing.
- Blur-reduction technology
- Not available
- Blur reduction works with VRR
- Not available
- Black frame insertion
- Not available
Measured
We could not find any of these 12 fields. Show them
- Input lag at maximum refresh rate
- Not available
- Input lag at 60 Hz
- Not available
- Average response time (measured)
- Not available
- Overshoot (measured)
- Not available
- Contrast ratio (measured)
- Not available
- SDR brightness (measured)
- Not available
- HDR brightness in a real scene (measured)
- Not available
- PWM flicker frequency (measured)
- Not available
- VRR range (measured)
- Not available
- Colour accuracy (measured Delta E)
- Not available
- Gray uniformity (measured)
- Not available
- Reflections (measured)
- Not available
Connectivity
- Video inputs
Type Version Count DSC HDCP HDMI 2.1 2 Not available Not available DisplayPort 1.4 1 Yes 2.3 USB-C Not available 1 Not available Not available - HDMI ports
- 2
- DisplayPort ports
- 1
- Highest HDMI version
- 2.1
- Highest DisplayPort version
- 1.4
- HDMI features
- Not available
- USB-C video (DP Alt Mode)
- Yes3Owner's manualgscs-b2c.lge.com/downloadFileRead 5 October 2026Page 14 explicitly supports PD and DisplayPort Alternate Mode at the upstream USB-C port.
- Thunderbolt
- Not available
- USB upstream ports
Connector Count USB-C 1 - USB downstream hub ports
Connector USB version Count USB-A 2.0 2 - Daisy chain (MST)
- No4Maker product pagelg.com/uk/monitors/gaming/45gx90sa-bRead 5 October 2026Exact table Daisy Chain No.
- 3.5 mm headphone output
- Yes4Maker product pagelg.com/uk/monitors/gaming/45gx90sa-bRead 5 October 2026Exact table three-pole headphone output, sound only. No microphone contacts.
- 3.5 mm microphone input
- No4Maker product pagelg.com/uk/monitors/gaming/45gx90sa-bRead 5 October 2026Exact table Mic In No and three-pole sound-only output.
Smart features
Audio and camera
- Number of speakers
- Not available
Ergonomics and controls
- Stand height adjustment
- 120mm1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo stand travel. Independently confirmed by manual page 8.
- Tilt
- Forward1°Backward15°1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo stand angle and manual page 8. Stored as positive directional magnitudes.
- Swivel
- Left10°Right10°1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo stand angle and manual page 8. Left and right are positive magnitudes.
- Pivot
- Not available
- Removable stand
- Yes3Owner's manualgscs-b2c.lge.com/downloadFileRead 5 October 2026Page 11 explicitly removes the supplied stand before wall mounting by reversing its attachment.
- VESA adapter needed
- No3Owner's manualgscs-b2c.lge.com/downloadFileRead 5 October 2026Pages 10-11 show the wall bracket attaching directly to the rear mounting holes. The optional wall bracket is separate.
- Security lock slot
- Yes3Owner's manualgscs-b2c.lge.com/downloadFileRead 5 October 2026Page 9 explains the physical Kensington socket. Its cable is optional.
- On-screen menu controls
- Joystick, Remote3Owner's manualgscs-b2c.lge.com/downloadFileRead 5 October 2026Own manual pages 15-16 describe joystick menu control and the included remote Settings and directional menu controls. The optional voice Magic Remote is separate.
- Desktop software
- Not available
- User firmware updates
- Not available
- Ambient light sensor
- Not available
- Presence sensor
- Not available
- Gaming menu features
- Black Stabilizer, Dynamic Action Sync, Crosshair, FPS Counter1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo named gaming functions. No AI feature from another generation is imported.
OLED care
We could not find any of these 3 fields. Show them
- OLED care
- Not available
- Burn-in covered by warranty
- Not available
- Burn-in warranty length
- Not available
Dimensions and weight
Front and side, drawn to scale. The dashed outline is the screen at its highest.
- Dimensions with stand
- Width992.7Height (lowest)541.7Height (highest)661.7Depth338.6mm(39.1 × 21.3 to 26.1 × 13.3 in)4Maker product pagelg.com/uk/monitors/gaming/45gx90sa-bRead 5 October 2026Exact UP and DOWN stand positions. Maximum independently agrees with manual page 18. No minimum height is calculated from travel.
- Dimensions without stand
- Width992.7Height457Depth218mm(39.1 × 18 × 8.6 in)3Owner's manualgscs-b2c.lge.com/downloadFileRead 5 October 2026Page 18 exact metric body dimensions. W x D x H source axes are correctly mapped. Rounded inch values are not converted back to fabricated precision.
- Stand footprint
- Not available
- Weight with stand
- 13.5kg(29.8 lb)3Owner's manualgscs-b2c.lge.com/downloadFileRead 5 October 2026Page 18 own model row, without packaging. US imperial rounding differs in places, so the direct metric value takes precedence.
- Weight without stand
- 8.9kg(19.6 lb)3Owner's manualgscs-b2c.lge.com/downloadFileRead 5 October 2026Page 18 own model row without stand or packaging.
- Box dimensions
- Width1,143Height301Depth550mm(45 × 11.9 × 21.7 in)4Maker product pagelg.com/uk/monitors/gaming/45gx90sa-bRead 5 October 2026Exact shipping W x H x D. Flat-packed box orientation is retained.
Power
- EU energy class SDRF6EU energy label (EPREL)lg.com/uk/lgecs.downloadFile.ldwfRead 5 October 2026Exact-model English page 2 row 3.
- EU energy class HDRG6EU energy label (EPREL)lg.com/uk/lgecs.downloadFile.ldwfRead 5 October 2026Exact-model English page 2 row 5.
- Power supply
- External adapter1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo external adapter.
- Input voltage
- 100-240 V AC, 50/60 Hz1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo mains input, confirmed by manual page 18 adapter input. Not the monitor 20 V DC input.
- Power use (typical)
- Not available
- Power use (max)
- Not available
- Power use SDR (EU label)
- 46.1W6EU energy label (EPREL)lg.com/uk/lgecs.downloadFile.ldwfRead 5 October 2026Exact-model English page 2 row 4 EU on-mode SDR power, at default 60 Hz. Not maker typical operating consumption.
- Power use HDR (EU label)
- 52.5W6EU energy label (EPREL)lg.com/uk/lgecs.downloadFile.ldwfRead 5 October 2026Exact-model English page 2 row 6 EU on-mode HDR power. Not a peak power rating.
- Off-mode power
- Not available
Certifications
- VESA ClearMR
- Not available
- VESA AdaptiveSync Display
- Not available
- TÜV certifications
- Not available
- ENERGY STAR
- Not available
- TCO Certified
- Not available
- EPEAT
- Not available
- Colour certifications
- Not available
- Other certifications
- UL Flicker-Free Display A196009, UL Discomfort Glare Free V563481, UL Low Blue Light Hardware Solution Platinum V7450514Maker product pagelg.com/uk/monitors/gaming/45gx90sa-bRead 5 October 2026Exact feature certificate footnote. Discomfort Glare Free V563481 uses UGR < 22.
In the box
- In the box
- Monitor, Stand, AC/DC adapter, HDMI cable, DisplayPort cable, USB-C cable, Remote control1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo cables and included remote, with the monitor, stand and external adapter in the manual. Optional Magic Remote, regional paper report and unstated cable lengths are omitted.
- Cables included
- Not available
Warranty
- Manufacturer warranty (source market)
- 2years1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B AllInfo two-year parts and labor warranty and exact U.S. support. EU one-year regulatory guarantee metadata does not replace U.S. terms. Burn-in-specific coverage is not established.
- Dead pixel policy
- Not available
Links
- Product page
- www.lg.com/us/monitors/lg-45gx90sa-b-gaming-monitor1Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitorRead 5 October 2026Exact U.S. 45GX90SA-B product identity. No GX900A or GS95QE hardware is inherited.
- Spec sheet
- www.lg.com/content/dam/channel/wcms/jp/catalog/pdf/202503_monitor_ultragear.pdf5Maker spec sheet (PDF)lg.com/content/dam/channel/wcms/jp/catalog/pdf/202503_monitor_ultragear.pdfRead 5 October 2026March 2025 maker technical catalogue, PDF page 4, printed pages 5-6. Only the exact 45GX90SA-B column is used.
- Manual
- gscs-b2c.lge.com/downloadFile3Owner's manualgscs-b2c.lge.com/downloadFileRead 5 October 2026Exact-model English manual linked by U.S. support. The cover names 45GX90SA. The manual date is not product retail availability.
- EPREL registration number
- Not available
Compare with
Pick a monitor to see both side by side. Differences are marked yellow.
Sources
We read 8 sources for this monitor. The numbers match the markers in the sheet.
- Maker product pagelg.com/us/monitors/lg-45gx90sa-b-gaming-monitor
- Owner's manualgscs-b2c.lge.com/downloadFile
- Maker product pagelg.com/uk/monitors/gaming/45gx90sa-b
- Maker spec sheet (PDF)lg.com/content/dam/channel/wcms/jp/catalog/pdf/202503_monitor_ultragear.pdf
- EU energy label (EPREL)lg.com/uk/lgecs.downloadFile.ldwf
- EU energy label (EPREL)lg.com/uk/lgecs.downloadFile.ldwf
- Maker product pageamd.com/en/products/graphics/technologies/freesync.html
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