TCL C855 vs Samsung R85H / R86H

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.

If it’s about brightness, the R85H performs really well. In most of our test scenes the TV reaches around 800 to 900 nits, and with larger bright elements it can break 1000 nits. These aren't, of course, levels on par with the most expensive Mini-LEDs, but they're more than enough for watching movies and TV series in HDR, and the effect can be quite noticeable. The problem shows up again in more demanding scenes where there's a small bright element on a very dark background. Here the TV can significantly reduce its brightness so it doesn't illuminate too much of the screen. In our measurements such small highlights dropped to around 200 to 250 nits, so you can see that a limited number of local dimming zones combined with the specific behavior of the algorithm has its consequences. Fortunately, it's not something that bothers you all the time. In typical mixed HDR scenes the R85H looks good and can deliver appropriate image dynamics. You just can't expect the same punch from very small points of light as you get with TVs that have many more zones or with OLEDs.

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.

In Filmmaker mode our R85H sample performed adequately in SDR, but a few things immediately showed up in the measurements. In the white balance, as brightness increased more red crept in while blue decreased. As a result, the brighter parts of the image had a slightly too warm tint. On top of that, gamma only held to the target value at the start. It then gradually fell, making most of the image a bit too bright. The combination of the two also affected colors — errors grew especially in the brighter, more saturated samples. It didn’t look bad, but for Filmmaker mode we expected a bit more accuracy. Interestingly, in HDR our unit handled things noticeably better. White balance was much more even and, for most of the range, the individual RGB components stayed close together. Only in the brightest areas did red begin to fall short, causing the white point to shift slightly. The EOTF curve looked very good, tracking the target luminance values across almost the entire range. That doesn’t mean HDR colors were perfect. The ColorChecker still shows some deviations, particularly in some of the more saturated hues, but the errors are clearly smaller than in SDR.

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 calibration the R85H shows it has impressive color reproduction capabilities. It performed best in SDR, where the white balance was brought almost perfectly into line and the gamma stays very close to the target across most of the range. That also translated into very low errors in the ColorChecker, so there's really little to fault here. HDR also shows a clear improvement, although some issues can't be corrected as well. At peak brightness the character of the backlight itself starts to show and the individual components of the white balance begin to diverge. The same goes for the most saturated colors, which don't always land exactly where they should. Despite these limitations, overall the image is significantly more accurate than on the factory settings, and the biggest difference is clearly in SDR. However, there's one thing calibration can't fix. With highly saturated elements, color can subtly bleed onto adjacent bright parts of the image. It's easiest to notice this on white, which can pick up a slight tint from a neighboring hue. It doesn't occur in every scene, but when the content is demanding the effect can be visible. This is more a characteristic of the way the RGB backlight works than an issue with picture settings.

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.

In the R85H, image processing is handled by the Micro RGB AI Processor. The name is new, but in terms of upscaling lower-quality content, the TV’s behavior remains very similar to what Samsung has shown before. And that’s not a bad thing, since the company has handled this aspect quite well for years. Low-resolution material is displayed cleanly, edges don’t become overly soft, and the TV doesn’t try to artificially extract details at any cost. The result is simply balanced, and with regular TV or older recordings the R85H performs as you would expect from a Samsung at this level. The only minor drawback is overscan, which can’t be completely turned off at the lowest resolutions. A separate issue is the additional processing of weaker sources. The R85H can smooth posterization and tidy up heavily compressed footage a bit, but it’s worth stressing that it does so relatively aggressively. At stronger "noise reduction" settings it starts removing not only compression artifacts but also fine details and natural film grain. It’s best to use it only when the material actually needs it.

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.

R85H has a 144 Hz panel, so motion is really smooth here. Just remember that the extra hertz above 120 will mainly be used when connected to a PC, so in this category we don't treat them as a particular advantage. For movies and TV, what's more important is that the panel is fast enough to provide access to an advanced motion-smoothing feature, "Motion Clarity", which lets us set motion from more film-like to very smooth. The panel's response time is a bit weaker. Because this is a VA panel, fast-moving objects can leave a slight trail. On bright backgrounds that's not very noticeable, but the darker the scene, the more visible the smearing becomes. That's a typical characteristic of this type of panel, and it's easiest to spot in dark scenes.

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 has been steadily expanding its gamer-focused features for several years, and the R85H really lacks nothing important in that area. The TV supports 4K at 120 Hz, VRR and ALLM, so you can easily take advantage of the capabilities of the PlayStation 5 or Xbox Series X. HGiG also works correctly, so with the right HDR settings on the console games retain proper brightness and you don't unnecessarily lose detail in the brightest parts of the image. The only major omission is Dolby Vision Gaming, which Samsung doesn't support on any of its TVs.

Game Bar is also very useful, a handy menu you can bring up without leaving the game. You can quickly check the frame rate, VRR operation, or change the most important picture-related settings. Samsung also adds a few less obvious features, such as the ability to change the aspect ratio or Game Motion Plus, which can further smooth games running at 30 or 60 fps. Of course, this comes at the cost of higher input lag (around 55 ms), but for slower-paced titles it may be an interesting option for some players.