Samsung OLED S90F (QD-OLED) vs TCL RM7L

The biggest difference between the 65-inch S90F and the other versions is brightness. The QD-OLED panel can achieve up to 1700 nits in laboratory tests, which is over 500 nits more than the variant with the WOLED panel. This translates to a significantly stronger and more engaging HDR effect. In most scenes, bright parts of the image look fantastic, and we have to admit we were pleasantly surprised because we expected results closer to the WOLED version, but we got an effect that makes a big impression even in movies. As with any OLED, there are moments when the panel has to limit brightness somewhat. This mainly concerns full-screen, very demanding scenes – for example, in the last test frame from the movie "The Meg," brightness drops to around 800 nits. However, it's hard to consider this a flaw since it’s still an excellent result, unprecedented in OLED TVs in this price range. All signs indicate that the 65-inch S90F could be one of the best choices this year for those looking for a strong OLED at a reasonable price. Another advantage of the QD-OLED panel in HDR content is its color gamut coverage. Thanks to quantum dots, the television achieves almost full 100% of the DCI-P3 color gamut and nearly 90% of the BT.2020 gamut. These values place it alongside much more expensive models and make it exceptional in its class.

The TCL RM7L is a bright TV. In our measurements its peak brightness hovered around 1600 nits. That's clearly less than the C7L, which can approach 2600 nits, but in real movie scenes the difference between the two models isn't that big. In less demanding shots with many bright elements on screen, the RM7L can hold around 1000 nits, and sometimes a bit more, approaching 1500 nits. It performs worse in dark scenes with small highlights; then their brightness can fall to around 500 nits. However, this behavior is not accidental. The TV intentionally dims small elements to better control the backlight and maintain higher contrast. This comes at the cost of their intensity, but it's typical behavior for local-dimming TVs in a similar price bracket.

Color gamut coverage

In HDR it's not only brightness that matters, but also color. And here the RM7L has a lot to show. Colors are strongly saturated, and a wide color gamut is one of its bigger strengths. In measurements it reached about 96% of DCI-P3 and around 83% of BT.2020. It's worth remembering, though, that on a TV with this kind of backlight the result can vary depending on the scene. On test patterns colors look best, while in movies their saturation can be a bit lower than on SQD Mini LED or QD-OLED TVs. The backlight construction itself is also interesting. The RM7L doesn't use the classic red, green and blue diode set. TCL used two green diodes and one blue, and obtains the red color using a PFS phosphor. You can see this in spectrometer measurements, but it doesn't have a major impact on the picture. Colors are still produced correctly.

Samsung S90F, like most modern televisions, offers several picture modes, but in keeping with our tradition, we checked it in the most important one, which is Filmmaker. This setting makes the picture look much more natural than in the default, often oversaturated modes. It is neither overly saturated nor artificially subdued – just closer to what you should actually see. However, that doesn't mean it's perfect. The S90F had noticeable shortcomings in white balance, primarily in the blue range, which created a slightly yellowish filter effect on most scenes. One might argue that it looks more "cinematic" because it's warmer, but let's not kid ourselves – George Lucas didn't shoot Star Wars in sepia 😉 (you'll find a comparison with a scene below as always). In HDR materials, there was also a problem with brightness management. The EOTF curve clearly showed that the television brightens the picture more than it should, which led to some effects looking too intense and deviating from the reference. Fortunately, many of these shortcomings can be eliminated through professional calibration – we will discuss the effects of this procedure further in the test.

We checked the factory colors in Filmmaker Mode, the best picture setting available to the user. TCL has been using it in its TVs for two years, and its purpose is to present the image as faithfully as possible in line with the creators' intent. On the RM7L this was indeed the best-calibrated mode, although it wasn't without flaws. The biggest issue was the white balance. An excess of red and blue caused the picture to take on slightly pinkish tones. This was visible in both SDR and HDR. Additionally, the luminance response was slightly boosted, which made the image appear a bit brighter but also less contrasty than it should have been.

Calibration quickly showed that the S90F has a substantial reserve of capabilities. The image in SDR immediately gained a natural quality – classic films stopped looking as if someone had applied a yellowish filter to them, and the colors regained their true character. It’s a return to the atmosphere of the original, without the impression that someone tried to "age" it artificially. In HDR content, the difference was even more pronounced. The EOTF curve was managed almost to a reference level, and any deviations are so subtle that most viewers won't even notice them. In practice, the S90F after calibration displays an image very close to perfection. Compared to the WOLED version, it performs even better – mainly due to the wider color gamut coverage, which makes the colors look fuller and more vibrant.

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

The S90F performs really well here, although there are some comments that are repeated in the case of most Samsung TVs. The noise reduction feature can effectively smooth out unwanted color transitions in lower-quality materials, such as television or YouTube, making them simply look better. However, it should be noted that it operates quite aggressively and can also soften elements that we wouldn't want to touch, like facial details. Therefore, if we want to use it, it’s best to use it in the "medium" setting and be aware of the compromise it brings. The upscaling itself is at a high level – low-quality materials are enhanced towards a 4K-like image. The only caveat is that the S90F can still have problems with so-called overscan, which is slight trimming of the edges in very poor materials like 576p and lower.

Upscaling and digital image processing are not the RM7L's strong suit. TCL used a MediaTek Pentonic 700 SoC here, designated MT5896, which isn't among the best processors at handling lower-quality content. The biggest problems show up with heavily compressed material from YouTube or regular broadcast TV. The processor can't effectively hide posterization and the characteristic color banding. The feature meant to smooth them does little here, and it often interferes too much with the picture, smoothing faces or fine textures, for example. For that reason, it's best to simply leave it off.

Straightforward upscaling to 4K looks better. Lower-quality sources remain reasonably sharp and retain enough detail. It's not on par with the best processors on the market, but for everyday viewing the result is entirely acceptable.

S90F is an OLED with a refresh rate of 144 Hz, but in practice, what matters most is how it performs at 120 Hz, as this frequency is the most significant when watching sports. The QD-OLED panel is no different in this regard from WOLED panels—the pixel response is almost instantaneous, allowing motion to be rendered with surgical precision. The effect is easy to predict. The image is practically free of ghosting, making gaming on consoles, matches, or other sports broadcasts a great pleasure on the S90F.

Fans of movies and series are not forgotten either. Like every Samsung TV with a refresh rate of 120 Hz and above, the S90F is equipped with a proprietary motion smoother called "Image Clarity." Here, we find two sliders—motion blur reduction and judder reduction—that allow you to improve the fluidity of materials recorded at 24 frames and adjust the effect to your personal preferences.

The RM7L uses a 144 Hz VA panel, so right out of the box it's a TV well suited for sports, gaming, and other fast-moving content. The high refresh rate also gives the motion interpolation engine more room to work, allowing it to generate extra frames. On the RM7L it works well, and with the right settings it can noticeably improve motion smoothness without causing an excessive soap opera effect.

S90F is a television that truly brings a lot of joy when gaming. Right off the bat, we get four full-fledged HDMI 2.1 ports, which means you can connect all consoles and PCs without having to figure out which device takes priority. This is a convenient and practical solution that is not a given with other manufacturers. Additionally, there are key features such as the automatic game mode (ALLM), which switches the screen to low-latency settings, and VRR frame synchronization working over a wide range from 48 to 144 Hz. This ensures that the picture remains smooth regardless of whether we are playing fast-paced online shooters or calmer story-driven titles. Another noteworthy feature is the Game Bar – a panel that allows quick access to several useful additions. For example, you can turn on an additional crosshair in the center of the screen, enlarge the minimap, or, in the case of a PC, change the aspect ratio. Finally, there is also the unique Game Motion Plus mode exclusive to Samsung. Its purpose is to smooth out older or less optimized titles, and it actually works quite well. Thanks to this mode, even less polished games can look better and provide more enjoyment than on other televisions that theoretically offer the same technical specifications.

You can say almost nothing but good things about the RM7L when it comes to gamer features. The TV supports ALLM, VRR, Dolby Vision Gaming and works correctly with HGiG, so it’s hard to point out any major omissions in that area. In practice this means automatic switching to low-latency mode, a smoother picture with variable frame rates, and accurate brightness reproduction in HDR games. There’s also a handy Game Bar. From it you can quickly check the frame rate, VRR status, signal format, and aspect ratio, and change key settings without leaving the game. TCL also added a few extra options, like a crosshair and brightening of dark parts of the image, which can be useful in some titles. The biggest downside comes from the use of the Pentonic 700 processor. Only two of the four HDMI ports support the full HDMI 2.1 standard. With a single console this won’t matter much, but when connecting two consoles and a PC you may run out of space. Especially since one of those ports may also be needed for eARC and a soundbar.