The LG UltraGear 27GX790B-B OLED gaming monitor is a 27-inch QHD display engineered for competitive gamers who demand motion clarity above all else. With a native 2560 x 1440 resolution and a blistering 480Hz refresh rate, this monitor sets a new benchmark in the 1440p competitive gaming space, outperforming traditional LCD panels that max out at 540Hz but lack OLED’s responsiveness advantages.
Key Takeaways
- 480Hz refresh rate with near-instantaneous response time delivers exceptional motion clarity for fast-paced gaming
- DisplayHDR True Black 400 certification provides deep blacks and bright highlights without haloing artifacts
- Burn-in risk with static UI elements and VRR flicker remain legitimate concerns for long-term use
- Supports Nvidia G-Sync and AMD FreeSync Premium Pro for adaptive refresh rate gaming
- Premium pricing around $999.99 USD undercuts the Sony Inzone M10S at $1,099.99
Motion Clarity That Sets a New Standard
The LG UltraGear 27GX790B-B OLED gaming monitor achieves what few displays have managed: genuinely sharp motion even at extreme frame rates. Motion looks sharp thanks to its near-instantaneous response time, and it has low input lag in its gaming picture modes, making it one of the best displays ever produced for identifying tiny objects and small text at high FPS. This responsiveness comes directly from OLED’s pixel-level control—each pixel switches on and off independently without the ghosting and blur that plague LCD panels.
For esports titles like Counter-Strike 2, Valorant, or Apex Legends, this matters. A player running at 300+ fps on a 480Hz monitor can actually perceive the difference between frames, spotting enemies milliseconds faster than someone on a 240Hz LCD. That edge compounds across thousands of rounds.
HDR Performance and DisplayHDR True Black 400
The LG UltraGear 27GX790B-B OLED gaming monitor carries DisplayHDR True Black 400 certification, which means deep blacks, no haloing around bright objects, and highlights that genuinely pop. OLED’s ability to turn off individual pixels creates the infinite contrast ratio that LCD backlighting simply cannot match—there is no light bleed, no blooming, no compromise.
However, HDR accuracy outside the monitor’s preset modes is difficult to achieve. The out-of-box sRGB mode is accurate, but calibrating the display for custom color spaces requires patience and may introduce fringing around text. For competitive gaming, this is a non-issue. For color-critical work, it is a limitation worth acknowledging.
The Burn-In Problem That Refuses to Go Away
OLED’s Achilles heel persists: static elements risk permanent burn-in. A static HUD, taskbar, or browser tab left on screen for weeks can etch itself into the panel permanently. LG has improved burn-in resistance over generations, but the risk remains real for users who leave their monitor on 24/7 or display the same game UI for hundreds of hours.
VRR flicker is another quirk—when frame rates change rapidly during gameplay, some users report visible flicker in the image. It is not a dealbreaker, but it is worth testing in person before committing to a $1,000 purchase. The matte coating does reduce glare well and the ergonomic stand offers solid adjustability, making the monitor comfortable for extended sessions despite these caveats.
How the LG UltraGear 27GX790B-B OLED Gaming Monitor Stacks Up
The Sony Inzone M10S costs $1,099.99, roughly $100 more, and offers similar competitive visuals but without OLED’s motion clarity advantage. The older LG 27GR95QE-B, an earlier OLED from LG, peaks at just 203 nits—far dimmer and less suitable for HDR gaming. For pure resolution, LG’s upcoming 27-inch 4K 240Hz QD-OLED monitors promise higher pixel density, but they sacrifice the 480Hz refresh rate that defines this monitor’s identity.
This is not a monitor for sunny offices or bright environments. Its WOLED panel struggles with intense glare, and it is better suited to moderate lighting conditions. If your setup is bathed in sunlight, a traditional LCD gaming monitor might serve you better.
Who Should Buy the LG UltraGear 27GX790B-B OLED Gaming Monitor?
Buy this if you are a competitive esports player who values motion clarity over everything else, you have a controlled lighting environment, and you can accept the burn-in risk inherent to OLED. The 480Hz refresh rate, near-instantaneous response time, and low input lag create an unmatched competitive advantage in fast-paced shooters and fighting games.
Skip it if you work in bright spaces, leave static content on screen for extended periods, or need HDR color accuracy for creative work. The Sony Inzone M10S or a high-refresh LCD alternative may serve you better, even if they sacrifice some motion clarity.
Is the LG UltraGear 27GX790B-B OLED gaming monitor worth the price?
At around $999.99, it undercuts the Sony Inzone M10S and offers superior motion clarity for competitive gaming. If you are a serious esports player, the cost-to-performance ratio is justified. For casual gamers, a $300-400 LCD monitor delivers 90% of the gaming experience at a fraction of the price.
Does the LG UltraGear 27GX790B-B have burn-in protection?
LG has implemented burn-in resistance improvements, but static elements can still etch into the panel with prolonged exposure. Using screen savers, adjusting brightness, and avoiding static HUD elements for extended periods reduces risk but does not eliminate it entirely.
What makes the 480Hz refresh rate matter for gaming?
At 480Hz, the time between frames shrinks to just 2.08 milliseconds, allowing players to perceive motion at granular detail—spotting enemies and reacting faster than on 240Hz or 360Hz displays. This advantage is most pronounced in esports where reaction time is measured in tens of milliseconds.
The LG UltraGear 27GX790B-B OLED gaming monitor represents the current peak of competitive gaming display technology. Its 480Hz refresh rate, OLED responsiveness, and DisplayHDR True Black 400 certification create an unmatched experience for esports players willing to accept OLED’s burn-in risk and accept a premium price. For everyone else, it is a stunning but unnecessary luxury.
Where to Buy
This article was written with AI assistance and editorially reviewed.
Source: Tom's Guide
