TCL P7K / P79K vs Samsung S85H

When evaluating the HDR effect, we must make it clear and without marketing embellishment: the P7K/P79K is not and was never meant to be a master in this field. The maximum peak brightness that this panel can generate is only around 300 nits. This is a borderline value, a sort of thin red line between what can be considered a barely satisfactory HDR signal and what is really not much different from standard dynamic range (SDR), unfortunately leaning towards the latter. Synthetic tests found brutal confirmation in reality – our measurements taken during movie screenings showed that luminance in key bright parts of the content rarely exceeded the threshold of 200-250 nits. Therefore, this is not a television that would allow content produced in a wide tonal range to truly shine, and we must openly acknowledge that.

Unfortunately, the issue of color reproduction is presented equally restrained. Although the manufacturer positions this model in the "QLED" family, thanks to the use of a PFS LED filter, the results do not match the heightened expectations. The coverage of the wide DCI-P3 color gamut is only 86%. Compared to the market, this is at best an average result, as most devices that employ additional layers to expand the color spectrum easily achieve values at a minimum level of 90-92%.

Interestingly, the new WOLED SE panel has brought a slight improvement in brightness to the S85 series. In the same movie scenes the previous year's model stayed closer to about 700 nits, while the S85H can reach around 800 nits. Of course this isn't a change that completely transforms the HDR experience, but that extra headroom is noticeable especially with small highlights, reflections, and stronger special effects. Around 800 nits is already a very good result for an entry-level OLED and in most films it's enough for HDR to have the right impact. Bright elements can clearly stand out from perfect black, and that contrast still does most of the heavy lifting here. You should remember the typical limitation of organic technology, though. When a very bright scene covers a large part of the screen, brightness can drop by almost half. This is the result of the panel's protection mechanisms, which limit its power with large bright areas.

Colors

The S85H can produce very pleasant, saturated colors and in most HDR films it looks really good in that respect. We measured roughly 95% DCI-P3 coverage, so the palette most often used in movies is reproduced to a very large degree. Skin tones, greens, and stronger reds still have appropriate intensity, and during normal viewing it's hard to fault them. Only when you look more broadly at BT.2020 do the limitations of the new WOLED SE panel become apparent. Coverage was around 70%, a bit less than in previous-generation WOLEDs and noticeably less than in QD-OLED panels. In films this isn't a major loss, because most productions rarely use such highly saturated colors. You notice it more often in games, where developers are much more likely to employ more intense colors.

Every reliable image quality assessment must begin by selecting the most optimal factory mode. In the case of the tested model P7K/P79K, the choice was confidently made for the "Film" mode. It is this mode that presents an image closest to the creators' intentions, avoiding both the exaggerated brightness of dynamic mode and the excessive dimming known from eco settings. And it must be admitted that, for a device in this price range, the factory calibration is surprisingly decent, although it is not free from a few stumbles. The most noticeable flaw turned out to be an imperfectly adjusted white balance. A slight dominance of the blue component gives the image a subtly cool, chilly character, thus deviating from the exemplary neutrality that the director wanted to show us. The television performs much better in reproducing the grayscale in a standard dynamic range – the gamma curve is executed almost perfectly. A minor reservation can only be made for the darkest parts of the image, where a slight deviation from the norm causes a loss of some detail in the shadows. The most serious challenge for TCL's software, however, was the interpretation of the HDR signal, which is illustrated by the EOTF curve. The television follows its own, rather free path here – the darkest details are disproportionately brightened, followed by a noticeable slowdown in brightness increase for midtones. Fortunately, most of these imperfections are software-related issues that can be eliminated. With this thought in mind, we proceeded to the professional calibration process.

To evaluate color we, of course, selected Filmmaker mode, and in SDR our S85H unit was very well calibrated out of the box. The biggest deviation appears in the white balance, where a bit of blue drops out as brightness increases. In practice this means whites and grays have a slightly warmer tint than they should. It's not a major error and during normal viewing it generally isn't very noticeable. Gamma also stays close to the reference value, so the image is neither overly bright nor unnecessarily dim. The S85H's SDR picture quality is therefore very good straight out of the box. A few more imperfections show up in HDR. Here the white balance shifts more as brightness increases, with blue becoming dominant and the red component noticeably lacking. That also leads to larger errors in some colors. These aren't yet distortions that completely change the character of the image, but compared directly with the reference the difference is easier to spot. Overall, Filmmaker mode is a very good starting point before professional calibration.

The calibration process turned out to be a home run, especially in the context of standard dynamic range (SDR) content. We successfully managed to eliminate the TV's tendency to emphasize cool tones, restoring the whites to their natural neutrality. Furthermore, precise adjustments allowed us to correct a slight error in the gamma curve, so the darkest areas of the image regained their proper depth, without a trace of unnatural brightening. The effects are measurable and impressive – in the ColorChecker test, the vast majority of color reproduction errors fell below the perceptual threshold, achieving a deltaE value below 2. This is a result that would not shame much more expensive constructions. Unfortunately, in the case of HDR content, we hit a wall in the form of the inherent limitations of the panel itself. And although we managed to bring the colors in line, the software's specifics mean that the TV still adapts brightness in its own way, as evidenced by the persistent, non-standard EOTF curve. In summary, calibration brings tremendous added value, but one must be aware that it cannot overcome certain physical barriers. A slight boost in black levels, resulting from the lack of local dimming, and limited peak brightness mean that HDR content will not always be able to showcase its full potential. This is simply not the main task of this display; its true strength, especially after professional tuning, lies in the viewing of SDR materials.

Calibration yields very good results on the S85H. First, the white balance can be set almost perfectly, which removes the slightly too-warm image cast that was visible earlier in SDR. Color reproduction itself also improves significantly; most errors drop to a very low level, and in everyday viewing it's hard to notice any visible inaccuracies. You can also improve a lot in HDR, although some issues remain due to the TV's inherent characteristics. The S85H doesn't always perfectly follow the brightness curve. The darkest areas are slightly boosted, and as you approach the panel's limits you can see small deviations in the brightest highlights. On top of that there's limited coverage of the wider BT.2020 gamut, which no calibration can of course overcome. Despite this, the end result is very good, and after calibration the S85H can deliver a well-tuned, natural image.

After a series of harsh evaluations, fortunately, the time comes for praise, and this is due to the TCL AiPQ image processor for its work in digital processing and content scaling. It should be noted right away that we are not talking about the level known from flagship designs; nevertheless, in the price segment represented by the P7K/P79K, the results achieved are more than solid. The feature that smooths tonal transitions performs particularly well, effectively eliminating posterization, which are the characteristic bands often visible in materials with higher compression, such as from the YouTube service. The algorithm can elegantly remove unwanted gradients, which ultimately looks really good. The television also competently handles upscaling, which is the task of raising low-resolution materials to 4K standard. The output image, although it may seem a bit too sharp out of the box, fortunately, is not a problem. The software allows for easy adjustment of this parameter using a sharpness slider, so the final appearance can be easily tailored to personal preferences.

For the S85H, Samsung used the same proprietary NQ4 Gen2 AI processor as in last year’s S85F, and in terms of digital image processing it performs quite well. Upscaling is one of this model’s strengths. Lower-resolution content is well sharpened, edges look natural, and the image doesn’t feel overly artificial. Just bear in mind a common Samsung quirk: at very low resolutions you can’t completely disable overscan, so the TV may slightly crop the left edge of the image. The "noise reduction" function, which smooths weaker tonal transitions, also works very well. The processor can effectively remove posterization and other imperfections visible in lower-quality material. However, you need to be careful with the strength of this feature, because Samsung can be fairly aggressive here. When it’s enabled, along with unwanted artifacts, fine image details such as the texture of skin or clothing can start to disappear.

The issue of fluidity and sharpness of the image in motion is inextricably linked to the fundamental parameter of the panel, and in the case of the TCL P7K/P79K, we are dealing with a panel that has a native refresh rate of 60 Hz. This specification already defines its capabilities and makes it difficult to unequivocally recommend it to enthusiasts of dynamic sports broadcasts. During rapid camera movements, the image loses sharpness, and the panel itself also shows a slight tendency to blur, which may be noticeable to more sensitive viewers. Fortunately, not everything in this aspect has been left to chance. The manufacturer has implemented a simple motion smoothing system, which is primarily used in film materials recorded at 24 or 30 frames per second. Thanks to a dedicated slider, the user can independently decide on the final character of the motion – from a fully cinematic, slightly juddery image to achieving a very smooth, almost theatrical effect. It is a simple yet effective tool that allows users to tailor the viewing experience to their own preferences.

The S85H uses an OLED panel, so it performs excellently when it comes to motion blur. Pixels respond virtually instantly, so moving objects don’t leave the characteristic ghosting seen on some LCD TVs. This is especially noticeable with sports or fast-paced games, where the image stays very clean even during rapid motion. The panel runs at 120 Hz. That’s more than enough for movies, TV series, sports, or console gaming. It’s a bit of a shame Samsung didn’t include a higher refresh rate aimed at PC gamers, since more and more TVs now offer 144 or even 165 Hz at 4K. However, that doesn’t affect motion perception in films or sports. There’s also the classic motion smoothing feature with two settings, blur reduction and judder reduction. So you can choose whether films should keep their cinematic 24 frames per second or if you prefer to smooth them a bit. The S85H gives you plenty of flexibility here, and the interpolation works well and, with reasonable settings, doesn’t produce too many artifacts.

Although on paper the native 4K@60Hz matrix might suggest that the TCL P7K/P79K is not a TV tailored for gamers, the reality turns out to be surprisingly different. On the contrary, the manufacturer has ensured a rich package of features that make it a very friendly companion for next-generation consoles. Onboard, we find key technologies such as ALLM, which provides automatic switching to low-latency mode, and VRR, or variable refresh rate, which eliminates screen tearing. The list is completed by support for Dolby Vision Gaming and a simple yet functional Game Bar. However, the real and extremely pleasant surprise is something else. It turns out that the TV easily supports high refresh rate signals of 120 Hz, but at lower resolutions – 1080p and 1440p. This is fantastic news for console owners who know full well how rarely games run in native 4K at a full 120 frames per second. The ability to choose between higher resolution and doubled smoothness is therefore an extremely sensible compromise.

In summary, although the P7K/P79K may not be the target screen for the most avid tournament gamers, it offers a package of options for the casual or occasional console user that is hard to find among many competitors at this price point.

The Samsung S85H is very well set up for gaming, whether you connect a console or a PC. The manufacturer didn’t skimp on ports and all four HDMI inputs support full HDMI 2.1. That means you can use 4K at 120 Hz, VRR, and ALLM without worrying which input to plug your console into. With several devices that matters, because you don’t have to choose between a console, a PC, or a soundbar connected via eARC. The feature set itself is very comprehensive. The S85H supports VRR, FreeSync, and automatic switching to game mode, and Samsung offers its comprehensive Game Bar, which lets you quickly view key signal parameters and change settings without leaving the game. The only real omission is Dolby Vision, which will matter mainly to Xbox owners. That’s a typical trait of Samsung TVs. Game Motion Plus performs very well and is one of the features that have set Samsung TVs apart for years. It smooths motion in games running at 30 or 60 fps, but does so without as large an increase in input lag as traditional motion smoothing. In practice, with more relaxed games, racing titles, or action games this can really improve perceived motion, especially if you’re sensitive to low framerates.