Samsung S99H Review: Record-Brightness QD-OLED With One Catch

Samsung has made QD-OLED its answer to LG's long-running W-OLED since 2022, arranging the sub-pixels in a triangle rather than a row. The S99H is the brand's new QD-OLED flagship, and the question in testing was whether it could beat the already-excellent S95F. On the evidence of the 77-inch model, it does — setting a brightness record along the way, with one clear step backwards. This review is based on that laboratory test, not our own hands-on trial.

The S99H arrives in a redesigned silver frame — plastic, but wrapped in a thin aluminium layer — and paired with the matte screen carried over from the S95D and S95F, which all but eliminates reflections. The effect recalls Samsung's The Frame art TV, complete with a four-part bezel, though here the frame does not detach. Everything points to wall mounting: cable channels route the leads out of sight through the rear, and recesses accept the optional wall bracket so the set hangs completely flat. On the two supplied clip-on feet the huge, wafer-thin 77-inch panel stood a little wobbly in testing — the S95F's central foot was steadier — but the outer feet do leave room for a soundbar up to 124.5cm wide between them.

Setup is smoothest with a Samsung account, which also unlocks app installation and smart-home control of compatible lights, thermostats and cameras. The processor is strong enough to keep Tizen OS running smoothly — a contrast with the lag on cheaper Tizen sets — and the app store is vast. The bundled remote is a highlight in its own right: tactile volume and channel rockers, dedicated streaming buttons and, best of all, a solar cell on the back so it effectively never needs new batteries.

Brightness is the headline. The S99H hit a blazing 2,856 candela per square metre in the lab — brighter than any television the test had measured. For context, the S95F reached 2,212 and the LG OLED G5 2,245, making the S99H roughly 30 percent brighter than 2025's best OLEDs. Combined with OLED's perfect blacks, HDR looked extremely three-dimensional and lifelike, with bright stars against a pitch-black sky and headlights genuinely popping. Colour is at reference level too: 109 percent of sRGB, near-complete DCI-P3 and a strong 90 percent of the future-facing BT.2020 gamut — ahead of the RGB Mini-LED Sony Bravia 7 II on that last measure.

Samsung fits its own HDR10+ for scene-by-scene tuning, though the picture is so good natively that HDR10+ content barely looks crisper than plain HDR10 — which softens the usual gripe that Samsung omits Dolby Vision. Upscaling is excellent, handling Full-HD Blu-ray without visible over-sharpening or smoothing. One setup note the test stresses: the AI picture modes look brilliant but run slightly cool, so it is better to switch them off, which enables the accurate Filmmaker Mode. Motion interpolation is good if not quite Panasonic or Philips class, and the default setting smooths too aggressively — a low-to-medium judder-reduction level (1–6 in the custom menu) is the sweet spot to avoid the soap-opera effect and stray artefacts.

The one real regression is audio. Where the S95F packed an array of woofers, tweeters and surround drivers, the S99H makes do with two down-firing stereo speakers. Dolby Atmos is supported only virtually; Atmos tracks sound fuller than ordinary 5.1, but voices come across a little flat — helped, at some cost to dynamics, by the "Amplify" tone setting. Anyone buying Samsung's best 77-inch OLED should budget for a soundbar to sit in front of it, connected via HDMI eARC; our best soundbars guide covers the options.

For gamers the S99H is close to ideal. All four HDMI ports accept up to 165 hertz at 4K, so a soundbar, PlayStation 5, Xbox Series X and gaming PC can all stay connected with no compromise, and input lag is a very low 9.6 milliseconds. Paired with the outstanding HDR, games look superb, and a Game Bar overlay surfaces frame rate, VRR and HDR status at a glance.

The Samsung S99H already ranks among 2026's best televisions. It beats its predecessor decisively on peak brightness, making HDR extremely brilliant, and its colour reproduction — helped by that wide BT.2020 coverage — is at reference level for OLED. The matte screen suits bright rooms, and the four 165-hertz HDMI ports make it a superb gaming display. The only meaningful step back is sound, so factor in a soundbar. It slots straight in among the picks in our best 4K TVs guide, and comes in sizes from 55 to 83 inches.