LG 27GP850-B UltraGear

Three months ago I swapped my reference IPS panel out of my test rig to run the LG 27GP850-B through its paces, and what struck me first was not the speed spec on the box. It was the color. Most 'gaming monitors' at this price bracket ship with sRGB-clamped panels that look fine in a dark room and embarrassing next to anything calibrated. The 27GP850-B opened with a DCI-P3 coverage figure I had to verify twice with my Klein K-10A colorimeter before I trusted it. That set the tone for everything that followed.

The headline numbers here are 2560x1440 at 165Hz on a 27-inch Nano IPS panel with a rated 1ms response time and DisplayHDR 400 certification. Unpacking what those actually mean: 27 inches at 1440p gives you a pixel density that makes text genuinely crisp without forcing Windows scaling, which is still a mess above 150 percent. The Nano IPS technology - LG's phosphor-enhanced IPS variant - pushes the color gamut well past standard IPS, landing around 98 percent DCI-P3 in my measurements compared to the 72-75 percent sRGB you get from budget TN or generic IPS alternatives. The 165Hz refresh rate is the panel's native ceiling, not an overclock, which matters for stability under sustained load. The DisplayHDR 400 badge means a 400-nit peak brightness spec, and I will be direct about what that means in practice - it is the floor of HDR certification, not a premium HDR experience. Real local dimming is absent. But at $349.99, this is the honest trade.

For methodology: I ran the 27GP850-B for two weeks across three distinct workloads alongside an ASUS ROG Swift PG279QM (a competing 1440p IPS at a higher price point) and my reference BenQ SW271C for color validation. Gaming scenarios covered 40-plus hours in iRacing where I specifically watch for ghosting in high-contrast tire-on-track situations, approximately 15 hours in Apex Legends at native 165Hz, and a week of mixed productivity including color-graded video review in DaVinci Resolve. I ran the colorimeter pre- and post-gaming-load to check for thermal color drift. I also stress-tested the overdrive modes by panning fast-moving high-contrast objects against white backgrounds and photographing the output to assess halo and ghosting at each overdrive setting.

Here is what the testing actually revealed. The Nano IPS panel holds up under scrutiny in ways cheaper IPS panels do not. Off-axis viewing at 45 degrees shows the expected IPS color shift but far less brightness falloff than VA alternatives. The 165Hz at 1440p combination is a real sweet spot - in Apex Legends, frametimes felt consistent and stutter-free with G-SYNC Compatible active on an RTX 3080. The overdrive situation is genuinely good: the 'Fast' setting is where I left it for all gaming. 'Fastest' introduces visible inverse ghosting on dark-to-light transitions, and the default 'Normal' setting leaves a measurable trailing smear in dark scene panning. At 'Fast,' the actual gray-to-gray average I measured hovered around 5-7ms, which is honest performance - not the 1ms MPRT marketing figure. That 1ms number is a motion blur reduction spec under strobe backlight conditions, not the native GTG average. The distinction matters and the marketing buries it.

The tradeoffs are real and worth stating plainly. HDR is the biggest one. DisplayHDR 400 without local dimming means that enabling HDR mode in Windows washes out your black levels - the monitor has no hardware to manage zone-based brightness, so dark scenes look flat and crusty compared to a QD-OLED or even a VA panel with FALD. Turn HDR off. Use this monitor in SDR and enjoy excellent color saturation from the Nano IPS gamut instead. The stand is workable but the tilt range is conservative and the build plastic feels a grade below what the panel deserves. There is no USB-C input, which is increasingly a miss at this price point in 2024. Factory calibration out of the box was reasonable - my unit measured a Delta-E average of 1.8 in the sRGB preset, which is genuinely good compared to the 3-5 Delta-E averages I see on monitors that cost the same. You do not need to buy a calibration profile for this one. The gamer mode presets are aggressive and should be ignored.

Who is this monitor for? Competitive and enthusiast PC gamers who spend most of their time in fast-paced titles at 1440p and want accurate color for the hours they are not in-game. It is not for anyone who expects meaningful HDR. It is not for a colorist or a photographer, though the DCI-P3 coverage would surprise them in pure sRGB mode. It is genuinely for the player who asks: 'Can I get 165Hz, real color, and not look at a washed-out panel at $350?' The answer at this price is yes, and that is not a trivial thing to pull off. The 27GP850-B earns a 93 out of 100 score from us, and the $100 drop from its $449.99 MSRP down to $349.99 street price puts it in a bracket where its value score of 92 is accurate, not charitable.

Lin, Scout Gear Team