TCL C855 vs Samsung QN80F 100"

The TCL C855 delivers a highly varied HDR effect. At times, the television truly excels, while at other moments, it appears reminiscent of a low-end model equipped with FALD backlighting. Inconsistency is frequently found with this brand, so it didn’t come as a surprise. The first and last scenes, which feature large light elements, are nothing short of spectacular, boasting brightness levels of 1470 and 1820 nits, respectively. Such brightness can make viewers squint their eyes, allowing them to feel the extraordinary dynamism of the scene. It genuinely immerses the audience, creating a sensation of being inside the movie itself. However, the situation shifts dramatically when small or subtle elements with high luminance appear against a dark background. In these instances, the TCL C855 significantly reduces brightness to levels as low as 240 nits to mitigate halo effects. This reduction is disappointing, as it can make the movie appear as if it was not filmed in HDR. Despite these shortcomings, the HDR effect on the TCL C855 enhances the viewing experience during dynamic scenes, making it feel more engaging and allowing the viewer to feel part of the action. Even with smaller high-luminance elements, the television retains details without excessive dimming. Additionally, the TCL C855 adjusts image brightness according to scenes with rich detail, further enhancing viewing comfort.

When it comes to HDR in Filmmaker mode, the QN80F can make a great first impression on you. Our lab tests showed that under the best conditions, the TV can achieve brightness exceeding 1200–1300 nits. These are truly remarkable results, which make HDR effects in many films look incredible. The TV is simply bright enough that it doesn’t need to artificially adapt the picture – bright parts of scenes have the right "power" and actually look like a light source. Of course, the lab is one thing, and everyday viewing is another. In practice, during movie scenes, brightness usually oscillates between 700–1100 nits. These are still great values that, in most cases, give a strong sense of realism and make the lights on screen really capable of dazzling you. The problem arises in exceptionally challenging sequences, where, like almost every mini-LED, it reveals its limitations. A good example is Sicario 2: scenes with helicopters in the night sky look much weaker, and the lights lose intensity, dropping to around 370 nits, making it hard to speak of serious admiration. This leads us to the topic of colors. Although we are dealing with a QLED, the coverage of the DCI-P3 color palette is about 90%. This is fairly average for a quantum dot TV. In practice, this means that some colors may appear less saturated than we would expect, especially in demanding HDR productions.

The best factory mode for the TCL C855 is the "Film" setting, and all our tests were conducted using this mode. However, like many predefined modes, it has flaws that should be addressed to achieve an image closer to the producer's original vision. In our examination of the colour characteristics for both SDR and HDR materials, issues were found.

Focusing first on SDR content, there is a noticeable dominance of green in the white balance, which leads to an unpleasant greenish tint across the entire image. The gamma chart, crucial for image contrast, shows a significant deviation from the reference line marked at 2.4. Initially, there is a pronounced spike in the measured value, resulting in an over-contrasted image where details can merge into a dark blob. This condition persists for nearly 20% of the chart before it dips below the reference line, causing the image to brighten and resulting in a substantial drop in contrast.

In HDR materials, the factory mode performs somewhat better; the white balance appears more balanced overall, although the green tint resurfaces in the latter half of the spectrum. When we look at the Electro-Optical Transfer Function (EOTF) curve—unlike gamma, which reflects contrast—we identify two main errors: the darkest scenes are too dark, while the brightest ones become overexposed. This discrepancy was evident in our review of the scene from the movie "Pan," further illustrating the TCL C855's HDR performance issues.

Samsung QN80F performs best in Filmmaker mode, which is designed to faithfully convey the creators' intentions. And indeed – it is a mode in which the TV showcases its potential. But let’s not deceive ourselves, it is far from perfect. In SDR content, a problem with white balance became apparent. Slight deficiencies in green and a clear excess of red caused the screen to take on a pinkish hue. You don’t even need measuring tools to notice this – in everyday viewing, the slightly shifted color palette could be quite noticeable, and in color checker tests, colors were even "jumping" out of their reference fields. With HDR content, the situation was a bit better, as the white balance was closer to ideal, but another problem emerged – brightness management. The EOTF curve often caused the image to become too bright, which spoiled the perception of contrast, and in dynamic scenes led to a slight "flickering" in the reception. We actually already mentioned this in the sections about black levels and HDR. The good news, however, is that Samsung provides a lot of tools for improvement. The QN80F allows for really detailed calibration, including a 20-point white balance. And since the manufacturer left us so many options, we decided to see how the TV would perform after solid corrections.

TCL, like most manufacturers, offers advanced calibration tools within its televisions. These include both 2-point and 20-point adjustments for grayscale, as well as a comprehensive colour management system. As a result, we achieved impressive results in SDR materials, bringing the image significantly closer to the reference standard. We successfully eliminated both the green tint and the gamma issue, although a slight "kink" at the very beginning of the gamma curve still persists.

In contrast, the situation with HDR materials was less favourable, as the TCL C855 did not allow for precise modelling. We were only able to make minor adjustments to the EOTF curve while significantly enhancing the overall colour accuracy. This limitation suggests that while calibration tools are effective, they may require further refinement for optimal HDR performance.

After calibrating the QN80F, it immediately showed that it is capable of much more. The pink tint that could previously spoil the reception has disappeared, and the white balance finally looks as it should – natural and without excessive deviations. The colors have gained depth, and the image has become more saturated and consistent, making movies simply more enjoyable to watch. It's a bit like removing a light haze from the screen – suddenly everything seems sharper and clearer. Brightness management has also improved. The television no longer gets lost so easily in dynamic changes, and the EOTF graph shows that the curve tracking is much more stable. Of course, there are no miracles – the limited number of zones still means that small, bright elements can be slightly brightened, but that is due to the construction itself, not the settings. After this adjustment, the QN80F feels like a more mature piece of equipment, and watching movies finally provides the satisfaction one expects from a television even in the higher class.

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

Image scaling in TCL C855 is defined 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 to our eye. Even small, fine branches do not have jagged edges, and there is no white halo around figures, a characteristic of weaker scaling systems.

With lower quality materials, such as YouTube videos or older television recordings, the QN80F can showcase its stronger and weaker points. If strange color transitions or artifacts start appearing on the screen, it's worth using the noise reduction function. The best setting is at the "medium" level – it smooths out the problematic segments without blurring the entire image. However, one compromise must be kept in mind: this function always removes film grain. If someone enjoys its presence in older productions, it's better to leave the reduction turned off because, regardless of the setting, the grain simply disappears.

Resolution scaling, or upscaling, is another strong point of Samsung. The QN80F may not be the best TV on the market, but it performs very well in its price range, which is very important for such a large size as a 100-inch screen. Even low-quality materials can gain a second life – the image becomes sharper, more readable, and overall much more pleasant to view. A weak point remains overscan, or slight trimming of edges in very low resolutions (e.g., 576p), which has been a longstanding issue for Samsung. Fortunately, in everyday viewing of HD and 4K content, this practically doesn’t matter anymore.

The maximum refresh rate you can set on the TCL C855 is 144 Hz. Naturally, this is only possible after connecting the TCL C855 TV to a very powerful PC. Otherwise, we will be operating at a maximum refresh rate of 120 Hz, which is recommended if we want to watch primarily sports or materials with a lot of motion dynamics. For those who require high image fluidity, the manufacturer has implemented a multi-stage motion smoother. It is divided into two separate sliders which control the sharpness of moving images (Motion Blur Reduction) and flicker (Flicker Reduction). Both sliders can be adjusted from 0 to 10, with each level affecting the degree of fluidity, so everyone can find their sweet spot. We present a setting that allows for slight smoothing without the soap opera effect. The matrix of the TCL C855 features a very good response time. This is particularly important since VA panels often struggle with the so-called ghosting effect, where a black halo can be observed behind a fast-moving object. where a black halo can be observed behind a fast-moving object.

The QN80F features a 144 Hz panel, and this is evident in practice – with full refresh, the image is exceptionally smooth, and motion blur remains at an acceptable, barely noticeable level. However, this mode is mainly aimed at PC gamers. The most important reference point in everyday use remains a 120 Hz refresh rate, and here a certain discrepancy arises. During the UFO test, we noticed the blurring of contours of quickly moving objects – it looked as if the television had the BFI (Black Frame Insertion) function permanently enabled, which in practice led to an unpleasant double edge effect. We do not yet know if this is a software issue or a characteristic of this model, but in its current form, it is difficult to praise such behavior.

The TCL C855 TV has fully-featured HDMI 2.1 ports, boasting a full bandwidth of 48 Gb/s. During our testing, we confirmed the seamless operation of all functions included in this connection standard. As highlighted, all checkboxes are illuminated in green, a feature that will undoubtedly be appreciated by gamers, whether on consoles or those using the TV as a computer monitor. 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 powerful configurations can feed a 144 Hz signal to the C855, which handles this effortlessly. It is also worth noting the implementation of the HGIG mode, which can be excessively bright due to the shortcomings of the "Game" mode, making proper configuration on the screen challenging. Fortunately, the TV excels with the Dolby Vision format.

TCL, as one of the pioneering manufacturers, has equipped its televisions with a special GameBar, allowing for extensive adjustment of settings "on the fly" without the need to exit the game. This feature includes options like an additional crosshair grid, black level correction, and settings designed for individuals with disabilities. The image showcases the next generation of this solution.

In summary, the TCL C855 TV is an ideal choice for those seeking a screen for all forms of electronic gaming. With comprehensive features supporting such entertainment, it provides an extremely engaging experience. It is also important to emphasise that it maintains very low input lag, regardless of the selected settings, including when using the Dolby Vision HDR format.

Samsung QN80F gives the impression of a television designed with gamers in mind. On the list of advantages, we have a 144 Hz panel, four full HDMI 2.1 ports, complete support for VRR and ALLM, and one of the best-designed game bars on the market. In addition, there's the Game Motion Plus motion smoother, which works in games without actually increasing input lag, making the QN80F an absolute standout in this category. In practice, this means that you can enjoy a smoother picture without losing responsiveness, which is a dream for many console gamers!

As usual with Samsung, there’s a lack of Dolby Vision in games, and that's not surprising anymore. However, what surprised us much more is that in the 2025 models… the HGIG feature has disappeared. It was the feature that allowed consoles like PlayStation 5 or Xbox Series X to perfectly match HDR tone mapping to the capabilities of the television. In the current firmware of the QN80F, this option is simply not available—it seems more like a mistake than a conscious decision by the manufacturer, but on the day of testing, we have to acknowledge that HGIG is not available. Because of this one missing feature, the QN80F goes from being an almost perfect television for gamers to an "almost" perfect device. It's quite a shame because aside from this, Samsung has created a model that really sets the bar high in the gaming hardware segment.

[UPDATE] We have updated our tests of Samsung televisions from the 2025 lineup due to the release of software version 1131, which restored the crucial feature HGiG for gamers.