LG UltraGear 27GX790A-B 480Hz QHD OLED with DP 2.1
As an Amazon Associate and Newegg Affiliate I earn from qualifying purchases made using the “Buy” button at the bottom of this post. Where possible, you'll be redirected to your nearest store. Further information on supporting our work.The image quality and responsiveness attributes make high refresh rate OLED models very attractive for gaming. The LG UltraGear 27GX790A-B provides such an experience, with HDMI 2.1 included to enhance compatibility with games consoles such as the Xbox Series X and PS5. And DP 2.1 to maximise capabilities with new PC GPUs. The screen offers similar sleek modern styling to others in the series, this time with a polygonal low-profile stand base and wide neck design. The top and side bezels are ‘dual stage’ with slim panel border flush with the rest of the screen. With an overprovisioning of pixels (active area) between the image and panel border to facilitate one of the burn-in mitigation measures. The OSD (On Screen Display) is controlled by a joystick beneath the central region of the bottom bezel. An IR remote may also be included for OSD control, though that isn’t confirmed on the product page at time of writing.
A 26.5″ 2560 x 1440 (QHD or 1440p) LG Display WOLED panel is used with 480Hz refresh rate and RGWB subpixel layout. This is an improved layout which reduces fringing compared to the original RWBG layout. The monitor includes a matte anti-glare screen surface and has a 1.5m:1 static contrast ratio, 178°/178° viewing angles and 10-bit colour specified. VRR is supported via Adaptive-Sync and HDMI 2.1 VRR, including Nvidia ‘G-SYNC Compatible’ and AMD FreeSync Premium Pro, with assumed 48 – 480Hz VRR range plus LFC. The monitor is flicker-free with 98.5% DCI-P3 colour gamut specified, alongside 275 cd/m² typical maximum luminance (1300 cd/m² HDR peak). A factory calibration is included with hardware calibration supported using LG Calibration Studio and a compatible colorimeter. The monitor responds to HDR10 content in a dynamic way, with flexibility over adjustment of certain aspects such as brightness and colour channels. The monitor can put its per-pixel illumination, 10-bit colour support, generous DCI-P3 coverage and decent bursts of brightness to good use under HDR. VESA DisplayHDR True Black 400 certification is included.
A 0.03ms grey to grey response time is specified – although the exact figure should be taken with a pinch of salt, OLED technology is known for exceptional pixel responsiveness. At the rear, customisable ‘Hexagon’ RGB LED lighting is included. The stand offers full ergonomic flexibility, including 110mm (4.33 inches) height adjustment and pivot into portrait. 100 x 100mm VESA mounting is facilitated as an alternative. The ports face backwards in a recessed area beneath the stand attachment point and include; DC power input (external ‘power brick’), 2 HDMI 2.1 ports, DP 2.1 and 2 USB 3.0 ports plus Type-B upstream. A downwards facing 3.5mm headphone jack with DTX Headphone:X support is also included. The DisplayPort 2.1 capability (whether full UHBR20 or otherwise) is not specified at time of writing. The press release states a “67 percent increase in bandwidth compared to DisplayPort 1.4”, implying UHBR13.5 @54Gbps. Further details can be found on the manufacturer’s website, with the monitor listed for ~$999 USD.
