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

On the LCD side of the shop floor, TCL, Hisense, Sony, Samsung and LG are still slugging it out over whether the future belongs to RGB Mini-LED, Micro-RGB or SQD Mini-LED. OLED is a calmer place. LG has built televisions around a white sub-pixel — so-called W-OLED — for more than a decade, and since 2022 Samsung has taken it on with its own QD-OLED panels, which arrange the sub-pixels in a triangle rather than a row. The S99H is Samsung's new QD-OLED flagship, and the question here is whether it can better the already-excellent S95F. On the evidence of the 77-inch model, it can — setting a brightness record along the way, with one clear step backwards. This review is based on that laboratory test, not a hands-on trial of our own.

Lift the S99H out of its box and the redesigned silver frame is the first thing you notice. It looks expensive, though it is plastic wrapped in a thin layer of aluminium. Paired with the matte screen carried over from the S95D and S95F — which all but eliminates reflections — it recalls Samsung's The Frame art TV, right down to the four-part bezel, although here the frame does not detach. Everything about it is built for the wall: cable channels route the leads out of sight through the rear, and recesses accept the optional wall bracket so the set hangs completely flat, an OLED artwork in the living room. On its two clip-on plastic feet the panel stood a little wobbly in testing — largely down to the wafer-thin profile and sheer size, since the 77-inch model spans an enormous diagonal of nearly two metres — and the S95F's central foot felt steadier. The upside of the outboard feet is the gap between them, which takes a soundbar up to 124.5cm wide; Samsung's own 123cm HW-Q995GF slots in neatly.

Wall-mounting usually means losing easy access to the sockets, but not here. The S99H accepts an optional Wireless One Connect Receiver, which replaces the One Connect Box that shipped with — and was mandatory on — the S95D and S95F. Beyond a tidy install, it has a neat trick: it expands the four HDMI ports to eight. Prefer a sideboard? The two supplied feet clip on in seconds.

Setup is smoothest with a Samsung account; basic television works without one, but installing apps requires a login. Sign in and the S99H folds into the smart home, controlling compatible lights, thermostats and security cameras, and the SmartThings app can even turn a phone into a remote. Not that you will need to — the supplied handset sits well in the hand, with tactile rocker switches for volume and channels and dedicated Netflix, Amazon Prime Video, YouTube and Samsung TV Plus keys. There is no numeric keypad or backlight, but a solar cell on the back means it essentially never runs flat. Where Tizen OS can feel sluggish on cheaper sets, the processor here keeps navigation smooth, and the app store is vast, running from Sky WOW to Spotify to HD+.

For everyday broadcast viewing, good upscaling matters — the job of turning, say, a 1280x720 signal into the panel's 3840x2160 native 4K by calculating the missing pixels so the picture looks larger and sharper. The S99H passed with flying colours: Full-HD Blu-ray in particular arrived without visible over-sharpening or smoothing, and only lower 720p material showed those effects, and then only faintly.

Samsung now ships its better televisions not in Eco mode but in an "AI-optimised" picture mode, with an "AI adaptation" mode as an alternative. The first uses the AI processor to tune sharpness, contrast, colour and noise reduction scene by scene, adapting to brightness and content type — film, sport or game. The second goes further, reading room brightness and computing brightness, gamma and even colour temperature. Both look brilliant but run slightly cool, so it is better to switch the AI modes off, which drops the set into Eco and unlocks the accurate Filmmaker Mode. Beyond that there is little to adjust.

Now the fiercely contested matter of peak brightness. Samsung has gone a step further for 2026: a blazing 2,856 candela per square metre — 2,856 nits — in the lab, brighter than any television measured in this test to date. For context, the S95F reached 2,212 nits and the LG OLED G5 2,245 nits, making the S99H roughly 30 per cent brighter than 2025's best OLEDs. With OLED's perfect blacks, HDR looked extremely three-dimensional and lifelike — bright stars against a pitch-black sky, muzzle flash and headlights all leaping off the screen. Colour is reference-grade too: 109 per cent of sRGB, near-complete DCI-P3 and a strong 90 per cent of the future-facing BT.2020 gamut.

Samsung fits its own HDR10+ for scene-by-scene tuning of compatible material, of which there is plenty on Amazon Prime Video. The native picture is so strong, though, that HDR10+ content barely looks crisper than plain HDR10 — which takes the sting out of the usual complaint that Samsung omits Dolby Vision.

Frame interpolation is good, if not quite at Panasonic Z95B or Philips OLED910 level. Films run at 24 frames per second, which can look juddery on a fast OLED, so most viewers prefer some smoothing — and modern sets ship with it switched on. On Samsung's televisions the automatic setting is a very high level of smoothing: gloriously fluid, but it can throw up small clouding artefacts around people and objects, because to reach the panel's native 100 Hz the set inserts up to three frames for every real one (strictly 96 Hz, i.e. four times 24). Push it too hard and films take on that video-like soap-opera look. The sweet spot is a low-to-medium level: in the custom sharpness menu, choose a Judder Reduction step between 1 and 6.

The one real regression is audio. Where the S95F carried an array of woofers, tweeters and surround drivers, the S99H makes do with two down-firing stereo speakers. Dolby Atmos is supported, but only virtually; Atmos tracks sound fuller than ordinary 5.1, yet voices come across a little flat. The "Amplify" tone setting helps, at some cost to overall dynamics. Anyone buying Samsung's best 77-inch OLED for 2026 should budget for a matching soundbar, connected via HDMI eARC.

For gamers the S99H is close to ideal. All four HDMI ports accept up to 165 Hz at 4K, so a soundbar, PlayStation 5 (Pro), Xbox Series X and a gaming PC can stay connected at once, and input lag is a very low 9.6 milliseconds. Paired with the outstanding HDR, games look superb, and holding the play button summons a Game Bar overlay showing frame rate, whether variable refresh (VRR) is active and whether the picture is in HDR.

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 — helped by that wide BT.2020 coverage — is at reference level for OLED. The matte screen suits bright rooms, and the four 165 Hz HDMI ports make it a superb gaming display. The only meaningful step back is sound, so factor in a soundbar. It comes in four sizes: the 55-inch model (140cm, ideal at about 3 metres), the 65-inch (164cm, 3.5 to 4 metres), the 77-inch tested here (195cm, around 4.5 metres) and the 83-inch (211cm, best from 5 metres).