TCL RM7L vs Samsung OLED S95H (S99H) (QD-OLED)

TCL RM7L is a bright TV. In our measurements its peak brightness hovered around 1600 nits. That is clearly less than the C7L, which can approach 2600 nits, but in real film scenes the difference between the models is not that large. In less demanding shots with many bright elements, the RM7L can sustain about 1000 nits, and sometimes even a little more, getting close to 1500 nits. It performs worse in dark scenes with small points of light, where their brightness can fall to around 500 nits. This is not random behaviour. The TV intentionally dims fine details to better control the backlight and preserve higher contrast. That comes at the expense of their intensity, but it is typical behaviour for TVs with local dimming in a similar price bracket.

Colour gamut coverage

In HDR not only brightness matters but also colour. And here the RM7L has plenty to show. Colours are highly saturated and a wide colour gamut is one of its major strengths. In our DCI-P3 measurements it reached about 96%, and BT.2020 around 83%. It is worth remembering that on a TV with this kind of backlight the result can vary depending on the scene. On test patterns colours look best, while in films their saturation is sometimes a little lower than on SQD Mini LED or QD-OLED TVs. The construction of the backlight itself is also interesting. The RM7L does not use the classic red, green and blue LED set. TCL used two green LEDs and one blue, with the red produced by a PFS phosphor. This shows up in spectrometer measurements, but it does not have a major impact on the picture. Colours are still rendered correctly.

When it comes to brightness alone, the S99H is an astronomically bright TV. Its peak brightness in film scenes can exceed 2800 nits. Whatever the scene, you can count on powerful HDR effects that are almost blinding, exactly what you expect from a top-tier screen. It is the nature of OLED panels that they cannot sustain the same extreme brightness in very bright, full‑screen frames as they can with small highlights, but the results are still excellent. In a bright scene from the film The Meg, the sun still exceeded 2200 nits. That means the S99H managed to sustain higher brightness than most Mini LED displays on the market. In terms of brightness, the S99H is currently the best OLED TV we have tested.

Colour gamut coverage

The S99H also handles colour extremely well, which is a direct result of the QD-OLED panel used here. Whether the test scenarios were synthetic test patterns or measurements taken with film material playing in the background, the results remained at a very high level. The S99H easily covers almost 100% of the DCI-P3 gamut, and for the more demanding BT.2020 colour space it reaches nearly 90%. That is absolute top-tier performance. These results match what we have seen in the new SQD-Mini-LED screens, and in real film scenes even outperform RGB Mini LED displays.

We checked the out-of-the-box colours in Filmmaker Mode, the best picture setting available to the user. TCL has been using it in its TVs for two years, and its aim is to reproduce the image as faithfully as possible in line with the creators' intent. On the RM7L it was indeed the most accurately set mode, although it was not without flaws. The biggest problem was the white balance. Too much red and blue made the image shift towards slightly pink tones. This was visible in both SDR and HDR. On top of that the brightness response was slightly boosted, making the picture appear a little brighter but at the same time less contrasty than it should be.

Samsung offers a whole host of picture modes and features, but as usual we recommend choosing Filmmaker Mode, especially if you want the most faithful rendering of the filmmakers' intent. Out of the box the TV is tuned very well, although it has minor shortcomings. These are mainly a slight drift in the white balance in SDR content and a slightly low gamma. As a result, in darker viewing conditions the picture can be a little too bright compared with the reference gamma of 2.4, which is the standard for watching films with the lights off. These are, of course, minor points, because overall colour reproduction remains at a very good level and the errors in the ColorChecker measurements are not large. However, we know that with a screen of the S99H's class you can, and arguably should, expect even more, which is why we carried out a professional calibration.

Thanks to the fairly extensive calibration menu we were able to correct the vast majority of the previously described issues. The biggest change concerned the white balance. After calibration it now looks very good, so the picture shed its pinkish tint and became much more neutral. The luminance response has also improved. Both the SDR gamma and the HDR EOTF curve are now much closer to the reference values. The picture is no longer unnecessarily brightened, and darker areas look more natural and have greater depth. Better luminance accuracy also affected the colours, which after calibration are noticeably more accurate. Not everything could, however, be set perfectly. With HDR material the RM7L still interprets part of the signal in its own way and does not always follow the reference curve precisely. This is most apparent in some darker scenes, where the TV can either slightly lift the shadows or darken them completely. That is where the earlier impression of a slightly brightened, less contrasty picture came from. Despite this, the calibration delivers a very good result. It removes the most visible errors and, above all, makes the picture much closer to how it should look.

After professional calibration, FILMMAKER mode looks practically perfect. Because Samsung offers a rich set of advanced calibration features, we were able to fine-tune the colours to an almost perfect level. Above all, we managed to even out the white balance and the gamma curve, which resulted in noticeably improved contrast and proper image modelling. In this tuned picture profile there really isn't a single thing to criticise or call a flaw. After calibration, the S99H can deliver an essentially reference-quality image.

Upscaling and digital image processing are not the RM7L's strong suit. TCL has used the MediaTek Pentonic 700 chipset here, designated MT5896, which is not among the best processors when it comes to handling lower-quality source material. The biggest problems appear with heavily compressed content from YouTube or standard broadcast TV. The processor cannot effectively hide posterization and the characteristic banding between tones. The feature intended to smooth these issues does little to help, and can also interfere with the image too much, smoothing, for example, faces or fine textures. For that reason it is best simply not to use it.

Standard upscaling to 4K looks better. Lower-quality content is sufficiently sharp and retains an adequate amount of detail. It is not on a par with the best processors on the market, but for everyday viewing the result is entirely acceptable.

The proprietary Samsung NQ4 Gen3 processor is responsible for upscaling and digital image processing. It handles upscaling lower-resolution material to 4K very well. The picture is clear without looking artificial or overly sharp. The only rather specific drawback appears with very old material recorded at 480p or below. In such cases the TV can slightly crop the edges of the picture.

The processor also copes quite well with artefacts visible in lower bit-rate material, for example heavily compressed YouTube videos. The noise reduction function effectively smooths the image and reduces posterisation, but it operates quite aggressively. It can remove not only unwanted artefacts but also some fine detail, and even natural film grain. Wanting to preserve the source material as faithfully as possible, we decided not to use it. However, if someone prefers a clean, as-smooth-as-possible picture over retaining every detail, it may prove useful.

The RM7L features a 144 Hz VA panel, so from the outset it is well suited to sports, gaming and other fast-paced content. The high refresh rate also gives the motion interpolation more scope, allowing it to generate additional frames. On the RM7L it works well and, with the right settings, can noticeably improve motion smoothness without an excessive soap opera effect.

Another major advantage of organic OLED panels is their excellent motion handling. Thanks to the pixels' virtually instantaneous response time, the Samsung S99H exhibits virtually no motion blur. Fast-moving objects do not produce visible halos or trailing outlines, so the television performs very well for both watching sport and gaming. One characteristic of OLED screens compared with LCDs, however, is the way they render low-frame-rate material. With very slow camera movement the image can appear noticeably more 'choppy'. This can, however, be fairly effectively mitigated using a frame-interpolation system. Samsung lets you adjust judder reduction and blur reduction separately, so it's easy to find a compromise between smoother motion and preserving the cinematic character of the content.

The RM7L earns almost nothing but praise when it comes to features for gamers. The TV supports ALLM, VRR and Dolby Vision Gaming and works properly with HGiG, so it’s hard to point to any major omissions in that regard. In practice this means automatic switching to a low-latency mode, smoother motion at variable frame rates and accurate brightness reproduction in HDR games. There’s also a very useful Game Bar. From it you can quickly check frame rate, VRR status, signal format or aspect ratio, and change the key settings without leaving the game. TCL has also added a few extra options, such as a crosshair overlay and brightening of dark image areas, which can be handy in some titles. The biggest drawback stems from the use of the Pentonic 700 processor. Only two of the four HDMI ports support the full HDMI 2.1 standard. That won’t matter much with a single console, but if you connect two consoles and a PC you may run out of ports, especially since one of those ports may be needed for eARC and a soundbar.

The Samsung S99H is also a great TV for gamers. It offers almost every possible and useful feature... well, except for the obvious lack of Dolby Vision for the Xbox console. It's equipped with four full-bandwidth HDMI 2.1 ports that offer the full 48 Gbps. This lets you use VRR frame-rate synchronization and the automatic game mode (ALLM) without any problems. This year Samsung also has no issues properly supporting HGiG, so HDR setup on a console is quick and straightforward. Samsung's TVs are also known for interesting extras. In the Game Bar menu you'll find options to add an on-screen crosshair, enlarge the minimap or change the displayed image's aspect ratio (PC).

Particularly noteworthy is Samsung's Game Motion Plus feature. It's Samsung's proprietary motion-smoothing system that uses interpolation to increase smoothness in games. Input lag then rises to around 40 to 50 ms (depending on the strength of the setting), which is an excellent result compared with the competition. The system makes gameplay noticeably smoother. So if someone has their eye on a demanding game (e.g. GTA 6 😉) that runs on a console at only 30 frames per second, the S99H can display it much more smoothly than competing models.