LG UltraGear 27GX790A-B / LG UltraGear OLED 27GS95QE-B

LG UltraGear 27GX790A-B: 27-inch class (26.5-inch) QHD 480 Hz OLED

LG UltraGear OLED 27GS95QE-B: 27GS95QE-B (Y24), 26.5-inch QHD 240 Hz OLED gaming monitor. The earlier 27GR95QE-B and the 480 Hz 27GX790A-B are separate models.

SpecificationLG UltraGear 27GX790A-BLG UltraGear OLED 27GS95QE-B
Release year20252024
Model27GX790A-B (US version 27GX790A-B.AUS)

LG’s US spec sheet carries a 2024 copyright; LG Brazil lists the model as a 2025 product.

LG		—
Panel26.5-inch (27-inch class) OLED, 16:9

The actual viewable diagonal is 26.5 inches.

LG		26.5-inch (67.3 cm) OLED; 2560 × 1440; 16:9; 0.2292 mm pixel pitch

Although sold in the 27-inch class, the viewable diagonal is 26.5 inches. OLED lights each pixel itself, so there is no backlight bleed.

LG
Resolution and pixel pitch2560 × 1440 (QHD); 0.2292 mm pixel pitch

QHD at 27 inches means lower pixel density than 4K; small text looks less crisp but high frame rates are easier to reach on the GPU.

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Refresh rate480 Hz

480 Hz means up to 480 frames per second; seeing that benefit requires the game and GPU to deliver close to 480 fps.

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Response time0.03 ms (GtG)

Grey-to-grey pixel transition time; it is not input lag.

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BrightnessTypical 275 cd/m² (min 250); HDR peak at 1.5% APL typical 1,300 cd/m² (min 1,040)

1,300 nits applies only to small highlights covering 1.5% of the screen; on a full white screen OLED automatic brightness limiting kicks in.

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Contrast1,500,000:1 (typical)

OLED pixels can switch fully off, so black level is near zero; LG’s page notes the figure is measured at 25% APL.

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ColourDCI-P3 98.5% (CIE 1976); 10-bit (1.07 billion colours)

The sheet lists a paper calibration report in the box.

LG		DCI-P3 98.5% typical (90% minimum, CIE1976); 1.07 billion colours; factory calibrated; hardware calibration ready

A printed calibration report is included. Hardware calibration uses LG Calibration Studio with a compatible meter.

LG
HDRHDR10; VESA DisplayHDR True Black 400

True Black is the VESA HDR tier for very low black-level displays such as OLED.

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Variable refreshVESA AdaptiveSync; NVIDIA G-SYNC Compatible; AMD FreeSync Premium Pro

Variable refresh matches the panel to the GPU frame rate to reduce tearing and stutter. LG’s page also lists VESA ClearMR 21000 certification.

LG		—
Screen surfaceAnti-glare, low-reflection front polariser LG—
Inputs2× HDMI (HDMI 2.1 FRL compliant); 1× DisplayPort 2.1

FRL is the high-bandwidth transfer mode of HDMI 2.1. There is no USB-C video input.

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USB and audioUSB 3.0: 1 upstream, 2 downstream; 4-pole headphone out (sound + mic); DTS Headphone:X

No built-in speakers are listed.

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StandTilt -5°/15°; swivel -30°/30°; height 110 mm; clockwise pivot; VESA 100 × 100

It has a tool-free 1Click stand mount and hexagonal RGB lighting on the back.

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PowerExternal adapter, 100–240 V; under 0.5 W in sleep, under 0.3 W off

The sheet does not list typical power consumption.

LG		External adapter (19 V, 7.37 A); under 0.5 W in sleep LG
Burn-in careOLED Care

LG says the feature helps prevent burn-in from static high-contrast images left on screen for long periods but may not prevent all image retention.

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Size and weightWith stand 23.8 × 22.8 × 9.8 in (raised), 20.5 lb; without stand 23.8 × 13.8 × 1.8 in, 11.2 lb

About 9.3 kg with stand, about 5.1 kg without.

LG		With stand 604.4 × 574.4 × 258 mm (raised), 604.4 × 464.4 × 258 mm (lowered), 7.35 kg; without stand 604.4 × 350.6 × 45.3 mm, 5.05 kg LG
In the boxPower cord, DisplayPort 2.1 cable, HDMI 2.1 cable, USB A-to-B cable, paper calibration report LG2 × HDMI cables, DisplayPort cable, USB A-to-B cable, remote control, adapter, printed calibration report LG
Speed—240 Hz; 0.03 ms (GtG) response time

GtG is the time a pixel takes to change from one grey level to another; lower values reduce motion blur.

LG
Brightness and contrast—275 nits typical, 250 nits minimum; contrast 1,500,000:1 typical, 1,200,000:1 minimum

LG quotes 275 nits for a full-white screen (100% average picture level); small bright areas can be brighter.

LG
HDR and sync—HDR10; VESA DisplayHDR True Black 400; NVIDIA G-SYNC Compatible; AMD FreeSync Premium Pro; VRR

Variable refresh rate matches the monitor to the graphics card’s frame rate, reducing tearing and stutter.

LG
Connections—HDMI 2.1; 1 × DisplayPort 1.4 (DSC); USB 3.0 (1 upstream, 2 downstream); optical audio out (SPDIF); 4-pole headphone out, DTS Headphone:X

DSC compression helps carry QHD at 240 Hz over DisplayPort 1.4. There is no USB-C video input.

LG
Speakers—2 × 2 W LG
Stand and mounting—Tilt, height, swivel and pivot adjustment; 100 × 100 mm VESA LG