Samsung S85F OLED vs TCL C7K / QM7K 55"-85"

For an OLED, the Samsung S85F can truly shine – literally. Under favourable conditions, it is capable of generating brightness exceeding 750 nits. This is hugely significant, as most films are created with displays reaching around 1000 nits in mind. In practice, this means that in scenes with moderately large, bright elements, the image can look simply fantastic. However, it's not always so rosy. When there is a huge amount of light on the screen – whether it's an expansive, bright background or a whole frame filled with white – the S85F has to tone it down. In such scenes, brightness can drop by even four times. This limitation is well-known to essentially every OLED in this price segment, so we do not consider it a particular shortcoming. However, something that deserves praise and sets this model apart from the competition is its colour gamut coverage. Thanks to the QD-OLED panel, our colourimeter recorded values exceeding 100% DCI-P3 coverage and as much as 86% for the ultra-wide BT.2020 gamut. Such results are hard to find even in televisions costing several times more.

In terms of brightness, the models ranging from 55 to 85 inches in the C7K series are truly impressive. Under the best testing conditions, the 65-inch screen reached over 1200 nits, which in practice means that the brightest scenes can shine with almost cinematic brilliance. These are not just dry numbers from measurements – during viewings, the white skies, explosions or reflections of light on water looked extraordinarily striking, often giving the impression that the television exceeded its price class. This is particularly effective in scenes with large areas of brightness, where the screen is filled with intense light – such as in sunlit shots or during dynamic action sequences. Viewers seeking strong HDR will definitely be satisfied.

However, scenes that require precise control of the backlighting – with small points of light on a dark background – prove to be more challenging. Here, the C7K, despite having over a thousand zones, still dims the brightness to maintain deep blacks. The effect is that in films like Sicario 2 or Life of Pi, some details, like a distant lantern or single reflections, can be less distinct or blend into the surroundings. This is a compromise inherent in MiniLED technology – it provides excellent image depth and blacks at a level that ordinary LCDs do not offer, but this comes at the cost of limited visibility of the finest lights.

Samsung, as befits a manufacturer with ambitions, has equipped the S85F with a mode called Filmmaker. Its task is simple: to ensure that the colours on the newly purchased television are as true to what the director intended as possible. Sounds great… but, as is often the case, a theory that sounds great does not always translate into perfect practice.

In the tested unit, it quickly became apparent that the image – due to an excess of blue and red – looked as though someone had overdone the saturation a bit. As a result, quite significant colour errors occurred, particularly in 4K content. Moreover, there was a problem with brightness – the S85F could brighten most scenes more than it should, taking away their intended mood.

Fortunately, Samsung televisions, including the S85F, offer an impressive number of settings for advanced calibrators. This means that we could test what this panel is truly capable of when placed in the right hands.

A new feature in TCL televisions for 2025 is the long-awaited Filmmaker mode, which until now could be found in most competing brands. This is great news, as this mode is considered the one that most accurately represents the original vision of the creators and is often recommended by enthusiasts of good picture quality. Unfortunately – as is often the case – the mere presence of it does not guarantee perfection. The Filmmaker mode in the TCL C7K is not without its flaws. One can point out the incorrect white balance, particularly the slight dominance of blue, which resulted in cool, somewhat greyish skin tones. But that was not the biggest issue. The main complaint was excessive brightness exposure, which was clearly visible on gamma and EOTF charts. The image was simply too bright, at times even overexposed, which affected not only the texture of the scenes but also the overall viewing experience. Some details were simply lost, and the entire image looked like someone had slightly overdone the brightness slider. As always, we decided to see what could be squeezed out of it after calibration. And that’s where it started to get really interesting…

Thanks to the vast number of settings in the menu, we managed to bring the S85F to nearly an ideal level. The white balance in SDR content? Literally perfect – deviations do not exceed the value of “1”. So we can confidently say that in materials with not very high dynamics, we have an image close to reference here.

In HDR content, slight issues have arisen, but they are not significant in practice – most errors fall below the threshold of perceptibility, which is the value of “3”. We also managed to tame the S85F when it comes to brightness management – the EOTF curve, even in movies, holds an almost perfect line. This is one of those cases where after calibration, you can comfortably forget about the settings and simply enjoy films and series at the highest level.

After calibration, the TCL C7K presented itself in a really good light, especially when it comes to SDR content. We managed to precisely tune the white balance, colour gamut, and brightness characteristics so that the colour errors on the ColorChecker palette fell below a value of 2. For the uninitiated – this is nearly a perfect result, indicating that the image closely resembles what the creators intended. Unfortunately, it looked worse with 4K HDR content. While we slightly managed to calm the white balance and correct its previous errors, it still shows that the TV has some “MiniLED traits”, particularly in brightness management. When we checked how the C7K copes with the EOTF curve on real film scenes, rather than just synthetic test patterns, it turned out that the screen still tends to slightly brighten the entire image. This affects the overall impression – the black loses some depth, and the image becomes less contrasty than it should be. Despite these minor shortcomings in HDR content, the overall reception of materials – especially in SDR – is truly very good. After calibration, the C7K is capable of displaying an image that can successfully compete with much more expensive models. Good colour tuning, natural skin tones, and pleasant brightness ensure that movie sessions and everyday content viewing are more than satisfactory.

The tonal transition smoothing function in the S85F works really effectively – it can completely eliminate the problem of visible banding in very poor quality materials, such as those from YouTube. Unfortunately, even the lowest level of this option comes with compromises. Noise reduction is aggressive enough that it can smooth out the film grain that many of us consider a key element of the cinematic experience. At the "Standard" level, we did not notice that this function removed anything significant from the image, so we can recommend this setting. On the other hand, the "High" level is a different story – it can smooth out not only noise but also subtle, desirable details such as the texture of objects.

As for image scaling, the S85F performs very well. The material looks sharp, and the only minor imperfection is slightly visible aliasing of contours. And there’s still the persistent issue with Samsung televisions – overscan. This can cause the frame to be slightly cropped in certain scenes, which is worth keeping in mind when watching very old content.

The TCL C7K features a function that, according to the manufacturer, is designed to smooth out unwanted colour transitions – a sort of rescue for less successful tonal shifts. It's called "Gradual Smoothing" and... well, it sounds ambitious, but in practice, it works very poorly. Regardless of whether we set it to low or high, the difference is minimal. What's worse, the function can cut out elements from the image that should remain. Fortunately, the film grain remains untouched, so at least it doesn't smooth everything indiscriminately, but still – it's better to simply turn this option off.

When it comes to scaling lower resolution content, it’s much better. SD and HD materials look quite decent, although at times we had the impression that the image was losing sharpness and becoming too soft – as if something was detracting from its clarity. Fortunately, with very low sources (e.g. 576p), there was no overscan effect, meaning the image was not artificially cropped – everything fit on the screen as it should.

The S85F is a mind-blowingly fast television – and this is not just an empty phrase for effect. Thanks to the 120 Hz OLED panel, dynamic scenes, whether in games or while watching a live match, look exactly as they should – smoothly, sharply, and without the feeling that something is “slipping away” from the frame. The lightning-fast pixel response time, typical of OLEDs, plays its part here. Transitions between frames are virtually instantaneous, and the picture remains clear even during the fastest camera movements. A ball flying across half the pitch? A car racing in a chase scene? Here, everything is clear and free from the characteristic “trail” of LCDs.

This is exactly what we expect from a good OLED – no compromises when it comes to motion fluidity. The S85F gives the impression that regardless of the pace of the action, we can focus on what is happening on the screen, rather than the imperfections of the image.

The TCL C7K handles motion smoothness really very well. The matrix used in it offers a refresh rate of 144 Hz, which in itself suggests that this television is something more than a regular "60 Hz" panel. What's more – if we connect the C7K to a computer and set the resolution to Full HD. But we will write more about this in the section for gamers and cooperation with PCs. Returning to everyday use – both sports and films look very good here. Thanks to the fast panel and well-functioning motion smoother, the C7K is great for watching matches, as well as for film screenings. In the menu, we find two sliders – blur reduction and flicker reduction – which allow you to adjust the smoothness effect to your own preferences. At lower settings, we get a more cinematic effect, with a slight choppy motion. At higher settings – the image becomes more theatrical, overly smooth. Everyone can set it to their liking.

The S85F has practically everything on board to become the dream screen for gaming. Four full-fledged HDMI 2.1 ports with a bandwidth of 48 Gb/s, support for VRR, ALLM, a super-detailed Game Bar that clearly shows all parameters – and on top of that, a gem in the form of Game Motion Plus. This motion smoother makes animation in games more enjoyable, while input lag only increases slightly. This is a rare combination, and it’s a big plus for Samsung.

Now comes the moment when we need to complain a little. The lack of Dolby Vision in Samsung televisions has become standard, so there’s no point in hoping (unless something changes in a few years) – but the disappearance of HGiG after the software update is something hard to explain. HGiG (which stands for HDR Gaming Interest Group) is a mode that allows for precise reproduction of brightness in HDR games, in accordance with the creators' intentions. Without it, HDR calibration on a console becomes less precise, so we can end up with an image that is too dark in the shadows or excessively overexposed.

Perhaps Samsung will fix this in the next update – and we have high hopes for that. Because if HGiG returns, the S85F will become nearly the perfect television for gamers.

The TCL C7K is a television that on paper appears to be the dream equipment for gamers – and most importantly, it also holds up in practice. To start with the good news: there are two full-bandwidth HDMI 2.1 ports, so we can easily connect both a console and a computer, making full use of their capabilities. The panel itself supports a refresh rate of 144 Hz, which provides a significant advantage in fast-paced games. Additionally, it comes with a complete set of gaming features: VRR (Variable Refresh Rate), ALLM (Auto Low Latency Mode), and support for Dolby Vision in games. There is also an HGiG mode that allows for an HDR effect in line with the creators' intentions. GameBar, which is an information bar for gamers. It works quickly, looks clear (like a Nintendo console👌), and shows the most important information: the current frame rate, VRR status, and even HDR parameters.