LG 27GX790B-B 27” Ultragear QHD (3440 x 1440) OLED Gaming Monitor Dual Mode (QHD 540Hz/ HD 720Hz) 0.02ms TrueBlack 500 NVIDIA G-Sync Compatible AMD FreeSync Premium Pro DP 2.1 USB-C Black

- Outrageous Speed with LG's Brightest OLED Gaming Monitor - Experience the brightness and speed of 4th Gen OLED on a vivid 27" QHD display?engineered for ultra-smooth, tear-free gameplay. With a refresh rate up to 720Hz and lightning-fast 0.02ms response time, you’ll react faster, track every movement with precision, and outpace your opponents frame by frame with astounding brightness, clarity and speed. - Our Brightest, Boldest OLED Gaming Monitor - Powered by UltraGear’s latest OLED with Primary RGB Tandem tech, this is LG’s brightest OLED gaming monitor yet?reaching 335 nits typical brightness for clear visibility in bright scenes. Enhanced APL and reduced ABL keep critical visuals sharp during intense action, while UL Verified Perfect Black and DisplayHDR True Black 500 deliver deep contrast and pinpoint detail. - Next-Gen OLED Brilliance - 4th Gen Primary RGB Tandem OLED reaches 335 nits typical brightness while using less power than previous UltraGear OLED generations. The display's advanced 4-stack RGB structure delivers enhanced contrast, sharper detail, and color precision that stays consistent across every frame. - Dual Mode: QHD 540Hz for Detail or HD 720Hz for Speed - Dual Mode pushes gaming speed to the edge, letting you toggle between QHD resolution at 540Hz or HD at 720Hz from a hotkey. Gain outrageous speed and responsiveness for split-second decisions and competitive domination. - DisplayPort 2.1 Delivers Next-Gen Gaming Speed - DisplayPort 2.1 unlocks ultra-fast data speeds for stable, high-refresh gaming up to 720Hz. USB-C keeps your setup clean with single-cable output, and dual HDMI 2.1 ports connect seamlessly to today’s top consoles. More bandwidth. More clarity. More ways to win. - A Virtually Instantaneous 0.02 Response Time (GtG) - The ultra-fast 0.02 response time (GtG), reducing reverse ghosting and providing fast response time, lets you to enjoy a whole new gaming performance. - NVIDIA G-SYNC Compatible & AMD FreeSync Premium Pro - NVIDIA G-SYNC Compatible and AMD FreeSync Premium Pro deliver smooth, tear-free, low-latency gaming with high refresh rates?so every frame stays fluid and sharp. - UL-Verified for a "Perfect" Visual Experience - UL-verified Perfect Reproduction delivers that actual game content is faithfully rendered on screen, maintaining intended color and detail in both dark and bright environments. Unlike static image-based metrics, this certification reflects real-world content reproduction accuracy. - Deeper Detail with VESA DisplayHDR True Black 500 - Experience breathtaking realism with VESA DisplayHDR True Black 500, delivering nuanced shadow detail and rich black expression?even in the darkest game scenes. A 1.5 million:1 contrast ratio pairs with up to 99.5% (typical), DCI-P3 color gamut and Delta E≤2 color accuracy, to ensure colors are vivid, precise, and true to the creator’s intent?giving gamers and creators alike the confidence to see every frame as it was meant to be seen.

From the manufacturer

Outrageous Speed with LG's Brightest OLED Gaming Monitor

Our Brightest, Boldest OLED Gaming Monitor

Dual Mode: QHD 540Hz for Detail or HD 720Hz for Speed

DisplayPort 2.1 Delivers Next-Gen Gaming Speed

A Virtually Instantaneous 0.02 Response Time (GtG)

Next-Gen OLED Brilliance

NVIDIA G-SYNC & AMD FreeSync Premium Pro

UL-Verified for a "Perfect" Visual Experience

Deeper Detail with VESA DisplayHDR True Black 500

ClearMR 21000 Delivers Elite Motion Clarity

4-Pole Jack & DTS HP:X: Gaming Audio Unleashed

Versatile Connectivity

Dynamic Action Sync

Black Stabilizer

FPS Counter

Crosshair

Personalize Your Display with Switch App

ultragear gaming 27gx790b 2026

Virtually Borderless and Adjustable to Gamer Specs

Experience the brightness and speed of 4th Gen OLED on a vivid 27" QHD display?engineered for ultra-smooth, tear-free gameplay. With a refresh rate up to 720Hz⁴ and lightning-fast 0.02ms response time, you’ll react faster, track every movement with precision & outpace your opponents frame by frame.

Powered by UltraGear’s latest OLED with Primary RGB Tandem tech, this is LG’s brightest OLED gaming monitor yet. Enhanced APL and reduced ABL keep critical visuals sharp during intense action, while UL Verified Perfect Black¹ and DisplayHDR True Black 500 deliver deep contrast and pinpoint detail.

Dual Mode pushes gaming speed to the edge, letting you toggle between QHD resolution at 540Hz or HD at 720Hz² from a hotkey. Gain outrageous speed and responsiveness for split-second decisions and competitive domination.

DisplayPort 2.1 unlocks ultra-fast data speeds for stable, high-refresh gaming up to 720Hz. USB-C keeps your setup clean with single-cable output, and dual HDMI 2.1 ports connect seamlessly to today’s top consoles. More bandwidth. More clarity. More ways to win.

The ultra-fast 0.02 response time (GtG), reducing reverse ghosting and providing fast response time, lets you to enjoy a whole new gaming performance.

4th Gen Primary RGB Tandem OLED reaches 335 nits typical brightness while using less power than previous UltraGear OLED generations.

NVIDIA G-SYNC Compatible³ and AMD FreeSync Premium Pro deliver smooth, tear-free, low-latency gaming with high refresh rates?so every frame stays fluid and sharp.

UL-verified Perfect Reproduction delivers that actual game content is faithfully rendered on screen, maintaining intended color and detail in both dark and bright environments.

Experience breathtaking realism with VESA DisplayHDR True Black 500, delivering nuanced shadow detail and rich black expression?even in the darkest game scenes.

Certified at ClearMR 21000?VESA’s highest motion-clarity tier?this display eliminates the faint blur that lingers around fast-moving objects. Every rapid turn, sprint, and effect stays crisp.

Experience lifelike 3D audio with DTS Headphone?, pushing out spatial sound to make you feel even more part of the game. The 4-pole headphone jack combines stereo audio and mic input.

Versatile connectivity hub: Dual HDMI, DisplayPort 2.1, and USB downstream (x2) and USB upstream ensure seamless connections to all your devices, from consoles and peripherals to productivity gear.

Dynamic Action Sync reduces input lag for real-time response.

Black Stabilizer brightens dark scenes to see what's hidden.

FPS Counter shows your real-time frame rate.

Crosshair enhances precision for shooting accuracy.

With the LG Switch app?, easily optimize your monitor for gaming or everyday use. Adjust brightness, fine-tune image quality, apply settings with a hotkey, split the screen into 11 layouts, and launch video calls in a click.

Dive into gameplay on the 4-side, virtually borderless 27” OLED screen. The slim-profile display has adjustable height, tilt, swivel and pivot controls that let you customize your view, while backlighting amps up your battle station, making every session a vibe.