If you want better local dimming performance
Choose ASUS ROG Strix OLED XG32UCWMG. It scores 5.0 vs 1.0 for local dimming performance, with a 4.2 overall score.
LG 27G850A-B Monitor Review
Bottom Line
Brilliantly sharp 4K IPS Black and flexible 240Hz/480Hz modes make this a capable work-and-gaming display, but weak HDR and uneven motion tuning blunt its premium appeal.
PC gamers who switch between detailed 4K play and high-frame-rate competitive titles, especially those also needing a bright, sharp daily desktop monitor.
HDR-first or motion-clarity purists, one-cable USB-C laptop users, and buyers who cannot take advantage of both expensive refresh-rate modes.
Verdict
LG's 27G850A-B stands out for combining a sharp, exceptionally bright 27-inch 4K IPS Black panel with a 240Hz native refresh rate and an optional 1080p/480Hz mode. It is especially appealing as a hybrid work-and-gaming screen: text looks crisp, colors are wide-ranging, latency is very low, and IPS avoids the usual OLED burn-in concern. The big compromise is motion performance. While some testers find it excellent for LCD, more demanding measurements show slow pixel transitions and overdrive overshoot that prevent the refresh rates from reaching their full clarity potential. HDR is a more consistent disappointment, with just eight edge-lit dimming zones, grayish blacks beside bright highlights and visible blooming. No USB-C docking or built-in speakers also limits its versatility. It makes the most sense at a competitive price for people who actually need both gaming modes, rather than for buyers primarily seeking OLED-class motion or cinematic HDR.
Feature Scorecards
Summary
84 reviewed features-
Very positive 4.5-5.027 (32%)
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Positive 3.5-4.420 (24%)
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Neutral 2.5-3.413 (15%)
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Negative 1.5-2.415 (18%)
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Very negative below 1.59 (11%)
Pros highlights
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Native 4K/240Hz and optional 1080p/480Hz are exceptionally ambitious for IPS. The extra refresh does improve smoothness, but slow pixel transitions limit its full benefit.
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Moving between sharp 4K/240Hz and fast 1080p/480Hz is the signature attraction. Actual benefits vary with game frame rates and the panel's imperfect motion tuning.
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IPS Black is a welcome improvement over ordinary IPS, with roughly doubled native contrast in some testing. It still falls far behind good OLED or Mini LED dark-scene performance.
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Modern inputs, variable refresh and two speed modes make this a flexible gaming PC display. High frame-rate performance is limited by graphics hardware and visible motion blur.
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DisplayPort 2.1 is a welcome advantage over some rivals, but bandwidth limits still require compression at 4K/240Hz. Certain graphics-card and driver combinations may need attention.
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The display's powerful SDR brightness is among its most consistent strengths. It stays readable in well-lit rooms, even when set far below maximum.
Cons highlights
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Opinions range from excellent for an IPS panel to deeply disappointing against other 240Hz models. Across that divide, OLED is consistently clearer during fast motion.
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IPS Black delivers noticeably deeper blacks than conventional IPS displays. Bright objects still expose grayish blacks and the substantial gap to OLED.
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Its bright, wide-color HDR signal is much less impressive than the specification badge suggests. Eight edge-lit zones produce halos and disappointing scene contrast.
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Native 4K is razor sharp, while the 1080p high-speed mode is conspicuously softer for text. Lower-resolution game signals can look decent with measured sharpening.
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The specialty dual-mode combination can be defensible at a discount for buyers who use both modes. Slow pixel response and poor HDR make full premium pricing difficult to justify.
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Just eight edge-lit zones are too coarse for convincing HDR. Enabling them often adds halos, delayed transitions or muted highlights instead of genuinely deeper scenes.
Use Cases
Best for
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The sharp, bright IPS display handles static daytime work and fast evening games without OLED burn-in worries. It is strongest when both modes see regular use.
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Sharp 4K text, high brightness and no OLED burn-in concern make this a comfortable work monitor. Missing USB-C docking features and soft text in 1080p mode are the notable limitations.
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High SDR brightness makes daylight use a major strength, often without needing maximum brightness. A window shining directly into the screen can still overwhelm the matte finish.
Not ideal for
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HDR gamingBrightness alone cannot compensate for washed-out blacks and crude local dimming. HDR-first gamers are better served by strong Mini LED or OLED alternatives.
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USB-C laptop dockingWithout USB-C video input or charging, this is not a one-cable laptop workstation solution. Buyers who rely on docking should consider another monitor.
Compared With Category Average
Compared with other Monitors, this product is above average in 60 fps capped gaming, Windows Auto Color Management compatibility, PS5 gaming, near average in input lag, listing accuracy, below average in Blooming control, Shadow detail, curved screen immersion.
Comparison summary
83 compared features-
Above average 0.4+ pts higher29 (35%)
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Same as average within 0.3 pts17 (20%)
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Below average 0.4+ pts lower37 (45%)
Largest category differences
| Attribute | This product | Category average | Difference |
|---|---|---|---|
| Blooming control | 1.0 | 4.0 | -3.0 |
| Shadow detail | 1.5 | 3.7 | -2.2 |
| curved screen immersion | 2.0 | 4.2 | -2.2 |
| HDR highlight detail | 1.4 | 3.4 | -2.0 |
| local dimming performance | 1.0 | 2.9 | -1.9 |
| KVM switch performance | 1.0 | 3.0 | -2.0 |
| USB port accessibility | 2.0 | 4.0 | -2.0 |
| ghosting control | 2.0 | 3.9 | -1.9 |
Consider This Instead
If you want better Blooming control
Choose Dell Alienware AW3425DW. It scores 5.0 vs 1.0 for Blooming control, with a 4.2 overall score.
If you want better KVM switch performance
Choose MSI MPG 272URX QD-OLED. It scores 5.0 vs 1.0 for KVM switch performance, with a 4.2 overall score.
If you want better Image scaling
Choose LG 27GR83Q-B. It scores 5.0 vs 2.1 for Image scaling, with a 4.2 overall score.
Compared in Reviews
Products reviewers directly compared with this model, grouped into quick takeaways.
- Worse: dual-mode refresh rates The LG reaches higher refresh rates, although the Dell remains a dual-mode IPS option.
- Cheaper: price The LG charges more and offers higher refresh rates, while the Dell delivers more accurate colors and better motion handling.
- Better: VA contrast The AOC VA panel is cited as an example of the higher black-depth potential of VA technology.
- Better: OLED contrast and motion for price The Alienware QD-OLED is praised for faster motion and real HDR despite costing slightly more.
FAQ
What are its two gaming modes?
It runs natively at 4K/240Hz, or switches to 1080p/480Hz for games where maximum frame rate matters more than detail.
Does the 480Hz mode look as sharp as 4K?
No. The 1080p mode is visibly softer, especially for text, and testers noted blurring in the simulated 24-inch view.
Is its HDR good for cinematic games?
Not particularly. Eight edge-lit dimming zones create blooming and weak blacks, so Mini LED and OLED options offer more convincing HDR.
Is it fast enough for competitive gaming?
Input lag is excellent, but pixel response and overdrive tuning limit motion clarity, especially away from the highest frame rates. Some testers liked its LCD motion while others were strongly disappointed.
Is it suitable for office work and video editing?
Yes. The bright, crisp 4K IPS screen and wide color range work well for desktops and editing, with calibration improving accuracy.
Does it support consoles and older gaming hardware?
It supports common PS5 and Xbox signals over HDMI 2.1, and hands-on testing also found good compatibility with unusual retro signals.
Is it a good USB-C docking monitor?
No. It lacks USB-C video input and laptop charging, and its USB-A hub needs a separate upstream PC connection.
Sample Expert Reviews We Analyzed
These are a few of the reviews included in our analysis.
Video Reviews
YouTube - RTINGS Computer
- Review score
- 3.1
Article Reviews
rottenwifi.com
Our LG 27G850A-B review examines its 4K/240Hz and 1080p/480Hz modes, gaming latency, HDR weaknesses, OLED trade-offs, ports and price-based...
- Review score
- 3.4
geekchamp.com
LG’s 27G850A G8 switches between 4K at 240Hz and 1080p at 480Hz. Learn its specs, hardware requirements, IPS-versus-OLED trade-offs, price...
- Review score
- 3.6
techyorker.com
LG’s 27G850A offers 4K at 240Hz or 1080p at 480Hz. See its IPS Black specs, requirements, launch pricing, caveats and alternatives.
- Review score
- 3.2
rtings.com
The LG 27G850A-B is a high-end 27-inch gaming monitor. It's a new model in the 2025 UltraGear gaming lineup, with its standout feature being...
- Review score
- 3.6
displayninja.com
The LG 27G850A is a 27" 4K 240Hz IPS Black gaming monitor with the 1080p 480Hz Dual Mode, DisplayHDR 600, hardware calibration, and more!
- Review score
- 3.8
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