ASUS ROG Swift OLED PG32UCWM / LG UltraGear 27GX790A-B

ASUS ROG Swift OLED PG32UCWM: PG32UCWM · 31.5-inch · black

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

SpecificationASUS ROG Swift OLED PG32UCWMLG UltraGear 27GX790A-B
Release year20262025
Announcement15 July 2026: availability announcement ASUS—
Display31.5-inch OLED; 3840 × 2160; 16:9; flat, glossy surface ASUS—
Subpixel layoutTandem RGB OLED; RGB stripe without a separate white subpixel ASUS—
Dual mode3840 × 2160 / 240 Hz or 1920 × 1080 / 480 Hz

480 Hz is not available at 4K.

ASUS		—
Response time0.03 ms GtG, manufacturer specification

A pixel transition, not total input latency.

ASUS		0.03 ms (GtG)

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

LG
ColourTrue 10-bit; 99% DCI-P3 coverage, manufacturer specification ASUSDCI-P3 98.5% (CIE 1976); 10-bit (1.07 billion colours)

The sheet lists a paper calibration report in the box.

LG
HDRDolby Vision; VESA DisplayHDR 400 True Black; claimed 1000-nit peak

Peak brightness is not sustained full-screen brightness.

ASUS		HDR10; VESA DisplayHDR True Black 400

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

LG
Video inputs1 × DisplayPort 2.1a UHBR20 (80 Gbit/s); 2 × HDMI 2.1 FRL; 1 × USB-C DP Alt Mode ASUS—
USB-C power90 W USB Power Delivery ASUS—
USB and audio3 × USB-A 3.2 Gen 1; USB-B upstream; headphone output; no built-in speakers ASUSUSB 3.0: 1 upstream, 2 downstream; 4-pole headphone out (sound + mic); DTS Headphone:X

No built-in speakers are listed.

LG
Variable refreshG-SYNC Compatible ASUSVESA 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
Stand80 mm height adjustment; −5° / +20° tilt; 15° swivel each way; no pivot ASUSTilt -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
Wall mountingVESA 100 × 100 mm ASUS—
DimensionsWith stand 714.5 × 594.3 × 276 mm; without stand 714.5 × 430.4 × 64.4 mm (W × H × D) ASUS—
Weight9 kg with stand; 6 kg without stand ASUS—
Mode restrictionsELMB and VRR cannot run together; Pixel Cleaning interrupts the display for about 6 minutes ASUS—
Model—27GX790A-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
Panel—26.5-inch (27-inch class) OLED, 16:9

The actual viewable diagonal is 26.5 inches.

LG
Resolution and pixel pitch—2560 × 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 rate—480 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
Brightness—Typical 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
Contrast—1,500,000:1 (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
Screen surface—Anti-glare, low-reflection front polariser LG
Inputs—2× 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
Power—External 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 care—OLED 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 weight—With 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
In the box—Power cord, DisplayPort 2.1 cable, HDMI 2.1 cable, USB A-to-B cable, paper calibration report LG