LG UltraGear 27GX700A-B / LG UltraGear 27GX790A-B

LG UltraGear 27GX700A-B: 27GX700A-B: 26.5-inch QHD 280 Hz OLED gaming monitor. The 480 Hz 27GX790A-B and the 240 Hz 27GS95QE are separate models.

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

Specification	LG UltraGear 27GX700A-B	LG UltraGear 27GX790A-B
Release year	2025	2025
Panel	26.5-inch OLED, 4th-generation Primary RGB Tandem; 2560 × 1440 (QHD), 0.2292 mm pixel pitch In a tandem structure light comes from more than one OLED layer; LG associates this with higher brightness and lifetime. LG	26.5-inch (27-inch class) OLED, 16:9 The actual viewable diagonal is 26.5 inches. LG
Refresh and response	280 Hz; 0.03 ms (GtG) LG	—
Brightness	Typical 335 cd/m², minimum 300 cd/m²; up to 1500 nits peak according to LG The peak value applies to a small part of the screen in HDR content; brightness on a full white screen is much lower. LG	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 and colour	1,500,000:1; DCI-P3 99.5%; 1.07 billion colours The monitor is factory calibrated and ready for hardware calibration. LG	—
HDR	VESA DisplayHDR True Black 500; HDR10 LG	HDR10; VESA DisplayHDR True Black 400 True Black is the VESA HDR tier for very low black-level displays such as OLED. LG
Variable refresh	AMD FreeSync Premium Pro, NVIDIA G-SYNC Compatible, VESA AdaptiveSync LG	VESA 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
Connections	2 × HDMI 2.1, 1 × DisplayPort 1.4 (DSC), USB 3.0 (1 upstream, 2 downstream), 4-pole headphone out QHD at 280 Hz is reached over DisplayPort 1.4 using DSC compression. There are no built-in speakers. LG	—
Gaming features	Dual Controller, crosshair, FPS counter; hexagon lighting at the back LG	—
Stand and mounting	Tilt −5–15°, swivel ±30°, height 110 mm, pivot; VESA 100 × 100 LG	—
Power	External adapter, AC 100–240 V; under 0.5 W in sleep, under 0.3 W off LG	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
Size and weight	Without stand 605.2 × 351.0 × 45.3 mm, 4.8 kg; with stand 605.2 × 579.3 (469.3 at lowest) × 249.1 mm, 9.0 kg LG	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
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
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
Response time	—	0.03 ms (GtG) Grey-to-grey pixel transition time; it is not input lag. 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
Colour	—	DCI-P3 98.5% (CIE 1976); 10-bit (1.07 billion colours) The sheet lists a paper calibration report in the box. 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
USB and audio	—	USB 3.0: 1 upstream, 2 downstream; 4-pole headphone out (sound + mic); DTS Headphone:X No built-in speakers are listed. LG
Stand	—	Tilt -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
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
In the box	—	Power cord, DisplayPort 2.1 cable, HDMI 2.1 cable, USB A-to-B cable, paper calibration report LG