LG OLED C5 42-inch review: the best gaming display I've used, with a caveat about brightness

Six months daily. Hundreds of hours of competitive play. The input latency is real, the burn-in fear is overblown, and the brightness still isn't where it needs to be.

I have used a lot of gaming monitors. I have spent enough hours staring at panels that my opinions about input latency, response time, and panel uniformity verge on tedious. Most of those panels were IPS LCD, because for the last decade IPS was simply the right choice for serious gaming — fast enough, accurate enough, and free of the OLED-specific compromises (burn-in, ABL, low full-screen brightness) that made early OLED monitors hard to recommend.

The LG OLED C5 42-inch is the first OLED display I’ve used that I would recommend over an IPS at the same price tier for competitive gaming. The reasoning is not that the OLED panel is now “better” by every metric — it isn’t. But the things that OLED is uniquely good at have improved enough, and the things OLED is bad at have been mitigated enough, that the panel finally crosses the line for the kind of mixed competitive-and-cinematic use most PC gamers actually do.

How we tested

The C5 arrived November 4, 2025 and ran as my primary display for twenty-four weeks. It sits on a 28-inch viewing distance from a sit-stand desk, connected to a Ryzen 9 + RTX 5090 testbed via DisplayPort 2.1 UHBR 13.5. Total gaming time across the test period was approximately 700 hours, biased toward competitive titles (Counter-Strike 2, Valorant, Apex Legends, Marvel Rivals) but including substantial single-player time (Cyberpunk 2077 with path tracing, Black Myth Wukong, Helldivers 2).

Input lag was measured using a high-speed capture rig with the SMTT 2.0 latency tool at 144Hz with G-Sync enabled and Game Mode active. We took ten measurements at five different points in the response cycle and averaged. Brightness measurements were taken with a calibrated colorimeter at 10% window and 100% window in both SDR and HDR modes.

For burn-in testing, we did not deliberately stress the panel. We used it as a normal mixed-use display: gaming most evenings, productivity work most weekday days, with the standard mitigations (auto-hiding taskbar, dark mode in IDEs, 5-minute screensaver) enabled.

What works

The input latency is the headline finding. Display-only input lag, measured panel-only and with all VRR features active, came in at 1.8 milliseconds at 144Hz. For context: a top-tier esports IPS like the ASUS ROG Swift PG279QM measures around 1.5ms in the same test setup, and a typical mid-range IPS is in the 4-6ms range. The C5 is, in short, in the same latency tier as displays sold specifically for competitive use. This is a meaningful change from earlier OLED monitors, which generally measured 5-8ms display-only and felt noticeably “slower” to me in fast-paced play.

The DisplayPort 2.1 implementation is clean. UHBR 13.5 supports 4K 144Hz with full RGB chroma sampling, no DSC compression. For productivity work — code on a high-DPI display, technical documentation with small text — DSC introduces subtle artifacts that, while not catastrophic, are visible if you know where to look. DisplayPort 2.1 sidesteps that. For competitive gaming the difference is invisible; for mixed use I prefer the uncompressed signal.

The OLED panel’s strengths are still its strengths. Black level is true black (zero light emitted), contrast is effectively infinite, and the per-pixel emission means there is no backlight bloom around bright objects on dark backgrounds. Dark scenes in games look the way they’re meant to look. After six months I find LCD’s “dark grey” look noticeably worse on the few occasions I plug into a different display.

Perceived response time on dark-to-dark transitions is the OLED’s other big win. On an LCD, transitioning from a near-black pixel to another near-black pixel is the slowest part of the response curve, and “ghosting” in dark scenes is a real artifact. OLED has effectively zero dark-to-dark transition time. In dark gameplay — caves, night scenes, indoor maps in shooters — the C5 looks dramatically cleaner than any LCD I’ve used.

VRR (variable refresh rate) compatibility works without flicker, which is genuinely new for OLED. Earlier OLED gaming displays would flicker at low frame rates with VRR enabled — a known artifact of the OLED voltage stability problem. LG has solved this in the C5 generation. Across six months of mixed competitive and single-player play, with G-Sync compatible enabled, I saw zero VRR flicker.

Weaknesses

Brightness is the C5’s biggest limitation. Sustained full-screen brightness peaks around 800 nits in HDR mode, which sounds like a lot but is meaningfully short of the best mini-LED panels in this price range. The Asus ROG Swift PG32UCDP, for example, holds 1,400+ nits sustained. In practice, the C5 in HDR is bright enough to look good in moderately controlled lighting, but HDR highlights — the sun glinting off a car, a fireball in dark surroundings — don’t have the punch they should. In bright daylight the panel can feel washed out.

The Auto-Brightness Limiter (ABL) is the other side of the brightness story. When the panel shows substantial full-screen white — a bright UI, a productivity window, a snowy outdoor scene — it dims itself to prevent power draw. This is normal for OLED. It’s also visible. Switching from a dark game to a bright spreadsheet causes a noticeable drop in brightness over the first couple of seconds. Users who do heavy productivity work on the same display will find this annoying.

The burn-in mitigation logic occasionally drops the brightness during long static-content sessions, which is fine in principle and correct from a panel-life perspective, but is jarring when it happens during a tense esports round and I’m focused on a static UI element. Across six months the dimming was occasional, not persistent, and never persistent enough to obscure gameplay — but I noticed it.

The 42-inch size will not work for everyone. At a 28-inch viewing distance, the panel fills the visual field in a way that some competitive players will find too large — tracking the entire screen with eye movement alone is harder than on a 27-inch display. For single-player immersion this is great. For competitive shooters where peripheral awareness matters, smaller may be better. We strongly recommend a buyer try a 42-inch display in a store before committing.

The lack of USB-C input is a small but real ergonomic miss. Many gaming-and-productivity buyers want a single-cable laptop dock, and the C5 cannot do that — there’s no USB-C, no power delivery. A separate hub or a different monitor is required.

Verdict

The LG OLED C5 42-inch is the best gaming display I have used, and it is the first OLED display I would recommend over an IPS for competitive play. The latency story is real, the panel is genuinely excellent, and the OLED-specific weaknesses (burn-in risk, ABL, lower sustained brightness) are mitigated enough by 2026 hardware that they no longer disqualify the panel for serious use.

It is our Editor’s Pick for gaming displays as of April 2026, with two reservations: it is not the right display for a buyer in a brightly-lit, uncontrollable lighting environment (a mini-LED panel will be brighter), and it is not the right display for a heavy productivity user who needs maximum reliability against static-content burn-in (an IPS will not have that risk).

For everyone else — PC gamers in moderately controlled lighting who play a mix of competitive and visually demanding titles — the C5 is the best display we’ve tested. The 8.9 rating reflects that, with brightness as the consistent point against a perfect score.

Review unit purchased at retail. LG did not provide compensation, review samples, or pre-publication review of this article. Our Ethics & Independence policy explains how we test.