27” LG UltraGear™ OLED QHD 540Hz / 1080p 720Hz Dual Mode OLED Gaming Monitor
27" LG UltraGear OLED 27GX790B-B Gaming Monitor, OLED, 2560 x 1440, 540Hz / 720Hz, Dual Mode, 0.02ms, HDMI / DP
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27" UltraGear OLED 27GX790B-B 540Hz/720Hz Gaming Monitor from LG
born to game The LG UltraGear 27GX790B-B is a cutting-edge 27-inch OLED gaming monitor designed for competitive players who prioritise speed and visual clarity above all else. It features a QHD (2560×1440) OLED panel powered by LG’s latest 4th-generation “Tandem” technology, delivering exceptional contrast, true blacks, and vivid colour accuracy alongside a peak brightness of up to around 1500 nits in HDR highlights. What truly sets it apart is its “Dual Mode” capability, allowing users to switch between ultra-detailed 540Hz at QHD and an unprecedented 720Hz at 720p, paired with an extremely fast 0.02ms response time for near-instant pixel transitions. Combined with DisplayPort 2.1 bandwidth, HDMI 2.1 support, and adaptive sync technologies like NVIDIA G-SYNC and AMD FreeSync Premium Pro, the monitor is built to handle next-gen gaming hardware while minimising input lag and screen tearing. Overall, it represents one of the fastest consumer gaming displays available, blending elite esports performance with premium OLED image quality.
27"Screen Size
2560 x 1440Resolution
OLEDPanel Type
LG's Brightest* 4th Gen OLED
immersion like no other Introducing LG’s gaming monitor powered by 4th Gen OLED with revolutionary Primary RGB Tandem technology—reaching up to 1500 nits of peak brightness for visibly clearer gameplay, helping you to see on-screen visuals with clarity even in bright environments. In fast-paced or sunlit in-game scenes, enhanced APL and reduced ABL help maintain consistent luminance without dimming critical visuals. UL Verified Perfect Black, colour and VESA DisplayHDR™ True Black 500, this next-gen OLED delivers the contrast and clarity gamers need to react faster, see more, and stay immersed in every frame.
*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
*As of November 2025, among all LG models using WOLED prior to 4th Gen. OLED, 27GX790B offers the highest brightness.
Deeper Detail
VESA DisplayHDR™ True Black 500 Experience unparalleled depth and vibrant realism with VESA DisplayHDR™ True Black 500, delivering detailed black expression even in the darkest scenes. With DCI-P3 99.5% (Typ.) colour gamut, the monitor provides that colours are displayed with realistic detail, as close to the original intent as possible.
Game in Comfort
UL-verified advanced eye comfort technologies Featuring AGLR(Anti-glare and low reflection), LG WOLED’s UL-verified advanced eye comfort technologies minimise frustrating reflections and keep your eyes comfortable, delivering crystal-clear gaming performance with consistent clarity. With UL verifications in key areas—limiting harmful blue light exposure and preventing distractions from flickering lights—these technologies promote visual comfort and contribute to a smoother gaming experience, whether you’re gaming in bright environments or LED-lit rooms.
Dual-Mode with Selectable Options
720Hz(@HD) – 540Hz(@QHD) With VESA Certified Dual-Mode, enjoy UltraGear’s fastest performance with up to 720Hz—the highest refresh rate ever introduced. Seamlessly switch between QHD 540Hz for detailed visuals and HD 720Hz for ultra-fast action. Choose your preferred refresh rate and screen size via On-Screen Display, or toggle instantly through LG Switch for optimised gameplay across every genre.
High-Speed Bandwidth
DisplayPort 2.1 The latest DisplayPort 2.1 on the 27GX790B delivers next-generation bandwidth optimised for ultra-high-speed gaming, supporting stable performance even at extreme refresh rates. Extending this connectivity, the USB-C port supports streamlined single-cable display output and data transfer—ideal for modern setups that require flexibility without extra clutter. Completing the configuration, dual HDMI 2.1 ports can provide smooth compatibility with the latest consoles and gaming PCs, creating a fully integrated high-performance environment across devices.
Certified with a Widely Adopted Technology
AMD FreeSync™ Premium Pro & NVIDIA-validated G-SYNC® compatibility Powered by AMD FreeSync™ Premium Pro, NVIDIA-validated G-SYNC® compatibility, and VESA AdaptiveSync™ certification, this monitor provides tear-free, ultra-smooth visuals and low latency, delivering unmatched gaming precision and fluidity.
Sharper, Cleaner Motion
ClearMR 21000 VESA certified by ClearMR 21000, this monitor finally captures even the subtle blurring that occurs around the edges of moving objects, displaying fast-moving action with sharpness and detail. Also, it allows you to take a step closer to victory.
Dynamic Action SyncReducing input lag with Dynamic Action Sync, gamers can catch critical moments in real-time and respond quickly.
Black StabiliserBlack Stabiliser enhances visibility in dark scenes, revealing hidden details and improving clarity for smoother navigation through shadowy environments or sudden light changes.
CrosshairThe target point is fixed in the centre to enhance shooting accuracy.
Smarter Control, Seamless Switching
LG Switch With the LG Switch app, it's easy to optimise your monitor for both gaming and everyday use. Effortlessly manage your monitor settings—adjust image quality and brightness to your preference, then apply your settings instantly using a hotkey. The app also lets you split the screen into 11 layouts and launch your video call platform in a click—bringing even more convenience to your setup.
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| Monthly Payment: | £58.89 |
| Instalment Rate: | 16.9% p.a. (fixed) |
| Cost of purchase: | £649.99 |
| Total inc. interest: | £706.63 |
| Monthly Payment: | £31.74 |
| Instalment Rate: | 16.9% p.a. (fixed) |
| Cost of purchase: | £649.99 |
| Total inc. interest: | £761.69 |
| Monthly Payment: | £22.76 |
| Instalment Rate: | 16.9% p.a. (fixed) |
| Cost of purchase: | £649.99 |
| Total inc. interest: | £819.44 |
| Example | |
| Minimum Spend: | £99 |
| Instalment Rate: | N/A |
| Cost of purchase: | £99 |
| Total inc. interest: | £99 |
Representative Example:
Purchase Rate: 23.9% p.a. (variable)
Representative: 23.9% APR (variable)
Assumed Credit Limit: £1,200
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