TCL C855 vs Samsung QN80H

TCL C855 delivers a highly varied HDR effect. On one hand, the television truly shines, while on the other, it resembles a lower model with FALD backlighting. This situation is, however, regularly observed in this brand, so it was not a surprise to us. The first and last scenes, featuring large elements of light, look almost phenomenal, "shining" with brightness levels of 1470 and 1820 nits respectively. Such effects will certainly cause more than one person to squint, while simultaneously feeling the extraordinary dynamism of the scene itself. You can truly feel as if you are inside the film. The situation changes dramatically when small or minor elements with high luminance surrounded by black appear on the screen. The TCL C855, in order to avoid the halo effect, significantly reduces brightness to a level of even 240 nits, which is a disappointing result, causing the film to not appear as if it was recorded in HDR. The HDR effect in the TCL C855 makes watching dynamic scenes more engaging, allowing the viewer to feel as though they are part of the action. Even with smaller elements of high luminance, the television manages to maintain details without excessive dimming. Moreover, the TCL C855 test shows that the brightness of the image is adjusted for scenes with a large amount of detail, which enhances viewing comfort.

The Samsung QN80H is undoubtedly a bright TV. In synthetic tests it exceeds the 1000-nit mark, which on paper promises a solid HDR effect. In practice the screen really shows its teeth, although it can't fully spread its wings (or its backlight, if you will 🤔) in every condition. Bright, wide scenes make the best impression. Well-lit outdoor shots and brightly lit scenes look really good on it. Brightness then stays around 700 nits, which provides a noticeable step up in quality compared with standard SDR. Problems start in dark scenes with small, pinpoint highlights. The QN80H tends to dim these strongly, in order to protect black depth at all costs. On the one hand this gives better contrast, on the other... you lose dynamics and the brilliance of fine HDR detail. So the TV has considerable potential, but the dimming algorithm can be too restrictive.

Colour gamut coverage

When it comes to colours it's good as well. The QN80H uses quantum dot technology, and in our measurements it covered 93% of the DCI-P3 colour space and about 70% of BT.2020. Today those results aren't exactly jaw-dropping, but in real-world use they're more than sufficient to deliver a vivid, natural image for most films and TV series. Colours are suitably saturated, and after proper calibration they don't look artificial or overly aggressive.

The best factory mode for the TCL C855 is "Film," and it is on this mode that we conducted all our tests. Like any mode predefined by the manufacturer, it had its drawbacks that are worth correcting to achieve an image as close as possible to what the film producer intended. We will examine the colour characteristics in both SDR and HDR materials. Looking at the first, we see a noticeable dominance of green in the white balance, which, as you might imagine, resulted in an unpleasant greenish tint across the entire image. Observing the very important gamma chart, which is responsible for the image's contrast, we see a significant deviation from the reference line marked at 2.4. From the left, we can observe a strong spike in the measured value, which at this point caused the image to be overly contrasted, merging details into a dark blob. This situation persisted for quite some time, up to 20% of the chart's value, before then dipping below the reference. This, in turn, meant a brightening of the image and a significant drop in contrast. The factory mode performed slightly better in HDR materials, as the white balance looked quite good, except for the second half, where green once again took precedence. Looking at the EOTF curve, which, unlike gamma, shows the rate of brightness increase, we see primarily two errors: the darkest scenes were too dark, and the brightest ones were overexposed. This was something we could also observe in the scene from the film "Pan" in the paragraph checking the TV's HDR.

The factory settings of the QN80H performed really well, especially compared with the majority of TVs we receive for testing. Of course, our measurements were taken in Filmmaker Mode, and that's the mode we recommend turning on immediately after the initial setup. For SDR material, our sample was set up surprisingly well. The white balance was very even, colours looked natural, and errors were so small they were hard to notice without measurement equipment. The only weaker point was the gamma. In the brighter parts of the image the TV brightened them a little too much, which at times made the picture lose some depth. Still, we'd like most TVs to look this good straight out of the box.

It fared a little worse in HDR. The white balance was still set correctly, so the problem was not with the colours but with the way the QN80H managed image brightness. This was immediately visible on the EOTF chart. The TV brightened large parts of scenes too much, causing the brightest elements to clip. Interestingly, very small points were often dimmed too much at the same time. As a result, some fine details simply disappeared. So the factory Filmmaker mode in HDR is not bad, but it is definitely not as well calibrated as in SDR.

TCL, like the vast majority of manufacturers, provides advanced calibration tools in its televisions. Here we find 2- and 20-point adjustments for greyscale as well as an advanced colour management system. The results, as you can see, are very good, and in SDR materials we have significantly approached the reference image. We eliminated both the green tint and the gamma issue, although there is still a slight "kink" at the very beginning. The performance with HDR materials was somewhat poorer, as the TCL C855 did not allow us to model them adequately. We were only able to slightly adjust the EOTF curve and significantly improve the colours themselves.

We saw the biggest difference after calibration in HDR Filmmaker mode. SDR was already very good out of the box, so we didn't have much work to do there. In HDR, however, we managed to get to grips with the way the QN80H handled brightness, as it had been over-brightening most scenes. After calibration the picture is calmer, more natural and much closer to how a faithful image should look.

Once again, we will take a look at the function of smoothing tonal transitions, but this time also at image scaling. The latter is particularly important when watching lower-quality materials, such as certain television programmes or older films. We will focus on the function responsible for tonal transitions. Interestingly, just like in the scenes of the previous test, it performed excellently and smoothed out practically all the inconsistencies; however, here it had problems. Using the menu responsible for this function, we found that no setting - even the strongest - was of any help.

Image scaling in TCL C855 is described as one of the best we have had the opportunity to test so far. The image is sharp, but in a way that could be described as natural for our eyes. Even the small, fine branches do not have jagged edges, and there is no white halo around figures, which is characteristic of inferior scaling systems.

Digital image processing in the Samsung QN80H is handled by the second-generation NQ4 AI processor. It's a chip we already know from the manufacturer's earlier models, and it still performs very well, especially with lower-resolution content. The image is effectively upscaled to 4K, but without excessive sharpening and without giving the impression the TV is aggressively trying to improve the source material.

The "Noise Reduction" function also proves useful. It can noticeably reduce posterisation and visible banding in lower-quality material, particularly in low-bitrate streaming. However, it's important to remember that it does not work without side effects. It can remove some film grain and slightly smooth the image. So with a high-quality source we'd leave this function switched off. If, however, someone is more bothered by banding and uneven tonal transitions than by the loss of some grain, "Noise Reduction" can be a really useful addition.

The maximum refresh rate we can set on the TCL C855 is 144 Hz. Naturally, this is only possible by connecting the TCL C855 television to a very powerful PC. Otherwise, we will be operating at a maximum refresh rate of 120 Hz, which is recommended if we primarily want to watch sports or content with a lot of motion dynamics. For those requiring high image fluidity, the manufacturer has implemented a multi-stage motion smoother. This has been divided into two separate sliders regulating the sharpness of moving images (Motion Blur Reduction) and flicker (Flicker Reduction). Both sliders can be set in the range from 0 to 10, with each increment affecting the level of smoothing, so everyone can find their sweet spot. We present a setting that allows for slight smoothing without the soap opera effect.

The panel of the TCL C855 features a very good response time. This is particularly important as VA panels often have issues with so-called ghosting, which is the effect where a black halo can be seen behind a fast-moving object.

Motion handling and motion clarity on the QN80H are really good, mainly thanks to the fast panel. In 4K the screen refreshes at up to 144 Hz, and when switched to Full HD and connected to a PC it can reach as much as 240 Hz. That's new for Samsung TVs and a useful addition for people who want to use the TV for PC gaming as well. We were more interested, however, in how the QN80H performs at 120 Hz, because consoles use that refresh rate. Here it performs very well. The panel does not suffer greatly from the smearing typical of VA panels, and light trails behind moving objects are mainly visible on dark backgrounds. That said, it's nothing that would interfere with normal watching of sport or gaming. The TV also has a motion smoothing system that Samsung calls "Wyrazistością obrazu". You can adjust judder reduction and blur reduction separately, so it's easy to tailor its behaviour to films, sport or your own preferences.

The TCL C855 television is equipped with full HDMI 2.1 connectors with a full bandwidth of 48 Gb/s. During our tests, we confirmed the seamless operation of all functions that are part of this standard. As can be seen, all checkboxes light up green, which will certainly be appreciated by gamers, both console and those using the television as a monitor for their computer. Additionally, the TCL C855 supports both AMD FreeSync and NVIDIA's G-Sync, which can be easily activated in the graphics card settings. Those with a very powerful setup can send a 144 Hz signal to the C855, which this television handles effortlessly. It is also worth mentioning the implementation of the HGIG mode, which, however, due to the flaw of the “Game” mode, is overly brightened, making it difficult to configure properly on screen. Fortunately, the television performs excellently with the Dolby Vision format.

The TCL C855 is one of the first manufacturers to equip its televisions with a special GameBar, which allows for extensive setting changes on the fly, without the need to exit the game. It features functions such as an additional crosshair grid, black level correction, and settings for people with disabilities. In the picture, we can see the next generation of this solution.

In summary, the TCL C855 television will be an ideal solution for those seeking a screen for all sorts of electronic gaming. Thanks to all the features supporting such entertainment, it is incredibly engaging. It is also important to highlight the very low input lag, regardless of the selected settings, including with the HDR Dolby Vision format.

The Samsung QN80H is a TV that stands out when it comes to gaming features. The biggest new addition for 2026 is DLG mode, which allows refresh rates of up to 240 Hz when the image is switched to Full HD. It's an option aimed mainly at PC users, but it also shows that Samsung is still heavily developing the gaming side of its TVs. However, the list of advantages doesn't end there. The QN80H has four full-fledged HDMI 2.1 ports, which is still not standard at this price point. So you can connect several consoles, a PC or a soundbar at the same time without having to wonder which port supports the full video capabilities. The TV also supports VRR, ALLM and HGiG, so it's hard to fault its basic feature set.

A downside is the lack of Dolby Vision, which may matter primarily to Xbox Series X owners. However, this is not a flaw that disqualifies the QN80H as a gaming TV. Samsung has a feature most manufacturers still lack: its proprietary motion smoothing, Game Motion Plus. It's a motion smoothing system that works in game mode too, allowing you to improve the smoothness of titles running at 30 or 60 frames per second without a drastic increase in input lag. In practice, Game Motion Plus can make a much bigger difference than the Dolby codec, especially in more demanding games that don't offer a 60 FPS mode. The image becomes noticeably smoother, while controls remain sufficiently responsive. So despite the lack of Dolby Vision, the QN80H remains one of the best-equipped gaming TVs in its class.