LG UltraGear 27GX790A-B / ASUS ROG Swift OLED PG27AQDP

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

ASUS ROG Swift OLED PG27AQDP: PG27AQDP · 26.5-inch WOLED, 2560 × 1440, 480 Hz; single model

SpecificationLG UltraGear 27GX790A-BASUS ROG Swift OLED PG27AQDP
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 WOLED; anti-glare surface

WOLED uses a white OLED layer with colour filters; each pixel makes its own light, so blacks switch fully off.

ASUS
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.

LG		—
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.

LG		Up to 480 Hz

480 Hz improves motion clarity in fast games; reaching it also needs the graphics card to render close to 480 frames.

ASUS
Response time0.03 ms (GtG)

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

LG		0.03 ms (GtG)

GtG is the grey-to-grey pixel transition time, not total input lag.

ASUS
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.

LG		—
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.

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

The sheet lists a paper calibration report in the box.

LG		99% DCI-P3, 135% sRGB; 10-bit; ΔE < 2

A colour pre-calibration report is included in the box.

ASUS
HDRHDR10; VESA DisplayHDR True Black 400

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

LG		—
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		VESA AdaptiveSync Display 480Hz; AMD FreeSync Premium; G-SYNC Compatible

Variable refresh matches the monitor’s rate to the graphics card’s frame rate to prevent tearing.

ASUS
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.

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

No built-in speakers are listed.

LG		—
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.

LG		Tilt +20°/−5°, swivel ±30°, pivot ±90°, height 0–110 mm; 100 × 100 VESA; 1/4-inch tripod socket ASUS
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		—
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.

LG		—
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 60.5 × 54.8 × 27.4 cm, 6.2 kg; without stand 60.5 × 35.1 × 5.0 cm, 3.5 kg

ASUS states the dimensions are estimates and may vary by region.

ASUS
In the boxPower cord, DisplayPort 2.1 cable, HDMI 2.1 cable, USB A-to-B cable, paper calibration report LGDisplayPort cable, Ultra High Speed HDMI cable, USB 3.2 cable, power adapter, VESA mount kit, calibration report, ROG pouch ASUS
Resolution—2560 × 1440, 16:9 ASUS
Brightness and contrast—HDR peak 1,300 cd/m²; contrast 1,500,000:1 (typical)

The peak figure applies to a small part of the screen; ASUS notes that peak brightness may vary with colour pre-calibration.

ASUS
HDR and certifications—HDR10; VESA DisplayHDR 400 True Black ASUS
Video inputs—1 × DisplayPort 1.4 (DSC), 2 × HDMI 2.1 (FRL)

DSC compresses the signal in a way considered visually lossless so that 1440p 480 Hz fits within DisplayPort 1.4 bandwidth.

ASUS
Other connections—2 × USB 3.2 Gen 1 Type-A hub, headphone jack; no speakers ASUS
Power consumption—Under 27 W in use; under 0.5 W standby, 0.3 W off ASUS
Warranty—3 years, including OLED burn-in

Burn-in is when long-static images leave a mark on an OLED panel; the OLED Care features aim to reduce it.

ASUS