LG UltraGear 27GX790A-B / LG UltraGear 27GP750-B

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

LG UltraGear 27GP750-B: 27GP750-B; 27-inch Full HD 240 Hz IPS gaming monitor (Canadian spec table). The higher-resolution 27GP850-B and the OLED UltraGear models are separate products.

Specification	LG UltraGear 27GX790A-B	LG UltraGear 27GP750-B
Release year	2025	2021
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	27-inch (68.5 cm) IPS; 1920 × 1080; 16:9; pixel pitch 0.3108 mm A 0.31 mm pixel pitch works out to about 82 ppi at 27 inches. Viewing angles are 178°/178°. 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	—
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	—
Colour	DCI-P3 98.5% (CIE 1976); 10-bit (1.07 billion colours) The sheet lists a paper calibration report in the box. LG	—
HDR	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	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	NVIDIA G-SYNC Compatible; AMD FreeSync Premium Variable refresh matches the monitor’s refresh rate to the graphics card’s frame rate to reduce tearing and stutter. 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	—
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	External adapter; 45 W typical, 48 W maximum; under 0.5 W in sleep 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	Without stand 614.2 × 364.8 × 51.7 mm, 3.9 kg; with stand 6 kg LG
In the box	Power cord, DisplayPort 2.1 cable, HDMI 2.1 cable, USB A-to-B cable, paper calibration report LG	—
Refresh and response	—	Up to 240 Hz; 1 ms (GtG, in Faster mode) LG quotes 1 ms for grey-to-grey transitions at the fastest overdrive setting. Dynamic Action Sync aims to reduce input lag, and Black Stabilizer brings out detail in dark scenes. LG
Brightness and contrast	—	400 cd/m² typical (minimum 320); 1000:1 typical contrast (minimum 700:1) LG
Colour and HDR	—	99% sRGB typical (minimum 95%, CIE1931); 16.7 million colours; HDR10; factory calibrated HDR10 signals are accepted; LG lists no DisplayHDR certification in the spec table, and typical brightness is 400 cd/m². LG
Connections	—	2 × HDMI; 1 × DisplayPort 1.4; 3.5 mm headphone out A DisplayPort cable is in the box. There are no built-in speakers or USB hub. LG
Stand and mounting	—	Height, tilt and pivot adjustment; VESA 100 × 100 Height adjustment changes the overall height with the stand between 465.9 and 575.9 mm. LG