Samsung QD-OLED S90D / S94D vs Samsung QN900F

In the HDR effect quality category, Samsung S90D achieves remarkable results. On the luminance chart up to 10% window, the TV exceeds the magical threshold of 1000 nits, which is an impressive outcome. However, in the film scenes we tested, these values were slightly lower. Additionally, in the case of a scene with fullscreen sunlight glare, brightness drops to around 500 nits, but it still remains at a very good level. It is worth mentioning that this model stands out with very high colour gamut coverage, thanks to the QD-OLED panel used, which gives it an advantage over TVs with WOLED panels that cannot achieve such a wide spectrum of colours.

QN900F is a seriously bright TV – it can generate nearly 2000 nits, which is a level that remains unattainable for most models on the market. But the ability to achieve such brightness isn’t everything – it also matters whether the TV can make good use of it. And here it’s not always perfect. Our tests on cinematic scenes showed that in scenes like those from Life of Pi or The Meg, the QN900F can really shine – both literally and figuratively. In such moments, its greatest advantage, which is brightness, makes a huge impression. However, in more demanding scenes, things start to get tricky – similar to assessing contrast. When smaller, bright elements appear on the screen, the TV often struggles with the decision of whether to highlight them at the cost of black levels or perhaps maintain deep blacks but tone down the brightness. The result is situations where, for example, in the movie Sicario 2, the brightness dropped to just 200 nits, making details barely visible. The dimming algorithms could definitely be better, considering the class of this television.

Samsung 65 S90D with a QD-OLED panel has been tested in Filmmaker mode, which the manufacturer has been using for years to provide the best possible picture settings. In this mode, the TV offers a fairly decent image but with some shortcomings worth noting. In terms of white balance in HD content, viewers may notice a dominance of the red color. This effect can lead to the impression that certain skin tones appear unnatural and the overall scene will be too warm, which in turn can affect immersion in the watched material. In scenes where subtle differences in color are crucial, these distortions can be particularly noticeable. Similar sensations may also occur in 4K HDR content. Changes in white balance in this case can be analogous, with a noticeably smaller deviation in red color. This can also cause certain details and colors to not be fully represented, making the image lose its naturalness.

When it comes to contrast, the gamma presents quite well, however, some errors are still noticeable. Gamma values are below the reference level of 2.4, which can result in bright areas of the image being washed out and dark areas lacking detail. This limitation can cause some scenes to lack depth and detail, which in turn affects the overall presentation quality. On the other hand, the EOTF curve related to contrast in 4K HDR content performs really well, showing that the TV can effectively convey differences in brightness. Nevertheless, it is worth noting that these values are slightly below the ideal level on the graph, indicating the need for further optimization in this regard.

Samsung S90D in Filmmaker mode offers solid color reproduction, but requires some adjustments to fully realise the potential of the TV, especially in the context of different types of content.

Testing the QN900F in Filmmaker mode, the distinct characteristics of the image quickly became apparent, despite this mode being designed to reflect the director's vision. The white balance was not perfect – the television had noticeable deficits in blue. This caused the entire scene to take on a warmer tone, as if someone had applied a subtle filter in shades of yellow and orange to the image. In films where bright shots dominate – for example, scenes in the snow or under strong daylight – this gave an impression of a slight warmth that does not always convey the director's intention. The second noticeable element was the management of brightness. The QN900F sometimes brightened the image more than necessary. It looked as if the exposure had been slightly "pushed up," which caused the scene to lose some naturalness. Shadows could be too shallow, and contrast slightly weakened. These are not disqualifying errors, but for a television in this price range, it is clear that the Filmmaker mode has not been perfected one hundred percent. This is particularly noticeable when we compare its image to what was visible after the screen calibration.

After calibrating the TV, the Samsung S90D in film mode gains quality more than one might expect. The white balance for HD and 4K HDR content has been adjusted to near perfection. Although minor shortcomings can be noticed, they are subtle enough that they don’t significantly impact the overall picture quality. The colours have become more harmonised, aiding in the natural reproduction of details, particularly in scenes that require precise colour representation. It is worth noting that this model, in this size, uses a QD-OLED panel which offers broader colour gamut coverage compared to other sizes of this model that are equipped with a WOLED panel.

The contrast has also significantly improved. After calibration, the gamma graph is much closer to the expected line, providing a better balance between light and dark tones in the picture. The EOTF curve, which before calibration indicated issues with overexposed scenes, now shows significantly better results. This effect allows for the retention of more details in the bright areas of the image, especially in HDR materials.

After calibration, we managed to reduce the errors in white balance and adjust them to a level that can be considered acceptable. It's not perfect, but definitely better than the factory settings. Most colour errors now fall within the deltaE 2–3 range, so in practice, they shouldn't be noticeable during everyday viewing. The biggest improvement is evident in how the television handles brightness in SDR content. Shadows and details are no longer flattened, giving the image depth and naturalness. As for 4K HDR materials – colours themselves are no longer an issue, but one can still notice some imperfections in Mini-LED technology. The QN900F tends to excessively dim the smallest bright elements, causing them to sometimes disappear from view. However, it's worth noting that this is a much better solution than boosting the entire screen, which would ruin the contrast. This is more of a characteristic of the technology rather than a typical flaw, but it's worth keeping in mind. The effects of the calibration are really very good.

The television handles tonal transitions excellently, allowing colours to flow smoothly into each other, creating a natural image. The built-in noise reduction feature can further enhance these transitions, which can be useful in certain situations. However, it is worth remembering that activating this option may lead to excessive smoothing of the desired film grain structure, which in turn can affect the authenticity and atmosphere of the image. Therefore, caution is recommended when using this feature to avoid losing the character and depth of the content.

The Samsung S90D model effectively processes materials in lower resolutions. This can be seen in the displayed image. The model's silhouette is clear and naturally reproduced, with details well preserved. Additionally, the branches of the trees are well-defined, showing no visible jagged edges that could degrade the quality of the image. Thanks to effective upscaling, even lower resolution materials look attractive on the screen, which will surely please users enjoying a variety of content sources, such as standard cable or antenna television.

If we want to get rid of awkward tonal transitions that can be annoying, for example, while watching YouTube, we can use a feature called noise reduction. It works really effectively – it eliminates issues with colour blending when set to Standard level. However, as with most Samsung TVs, this comes with some compromises. Although we didn't notice this feature having a significant impact on the structure of objects in the image, it unfortunately reacts quite aggressively to film grain. Most people will likely appreciate this effect – the noise is simply removed – but if someone is looking for an image as close as possible to reference settings, we definitely recommend turning this option off.

When it comes to upscaling, or dealing with very low-quality content, the QN900F performs really well. On the test pattern with a model, the image looked clear, with only slight jaggedness that shouldn't bother most viewers. However, it’s worth mentioning one issue – the TV sometimes struggles with so-called overscan, which means older content may be slightly cut off. This can manifest, for example, with disappearing subtitles at the bottom of the screen.

Samsung S90D TV, equipped with a refresh rate panel of 120 Hz, and in the appropriate PC configuration even 144 Hz, ensures excellent motion fluidity. Samsung focuses on a variety of image clarity settings on a ten-point scale, giving users the freedom to adjust the display to their own preferences. In UFO tests, the OLED panel shows its strengths, eliminating any blurring. The lightning-fast pixel response makes dynamic movements faithfully reproduced.

Similar results can be observed in other sizes of this model with a WOLED panel, which also offer excellent image fluidity. Organic technology, in this case, is considered one of the best on the market. The picture of Samsung S90D, regardless of the type of panel, is incredibly sharp and detailed, making this TV perfect for dynamic scenes, both during gaming and sports broadcasts. Additionally, its capabilities in terms of refresh rate and clarity ensure that every movement is smooth and natural, which will certainly satisfy even the most demanding users.

There’s really nothing to nitpick here – the QN900F looks great when it comes to motion. Thanks to its 165 Hz panel in 4K, you can confidently say that this TV is suited for both watching sports and gaming. The motion smoother plays a key role here. It works brilliantly – not just with sports broadcasts, where it can eliminate blurring and image judder, but also in games, where animation becomes clearer and more fluid. And of course, if someone likes to experiment with movies – they have that option as well. At lower settings, you can see a slight graininess and a filmic quality, while higher settings introduce a soap opera effect. So everyone can tailor the picture to their preferences, and the TV has the power to handle it.

Television S90D is an excellent solution for gamers, offering a range of advanced features that elevate the gaming experience to a new level. Equipped with the HDMI 2.1 standard, the model supports modern technologies such as VRR (Variable Refresh Rate) and ALLM (Auto Low Latency Mode). Thanks to these solutions, the image is incredibly smooth, and the response to commands is instantaneous, which is crucial in dynamic titles. Additionally, the S90D supports HLG (Hybrid Log-Gamma) and G-Sync and FreeSync image synchronisation. This allows for a perfect connection with the Xbox, PlayStation, or PC, eliminating issues with tearing and stuttering. The built-in operating system offers the Xbox Game Pass app, providing access to a massive library of games directly from the television. This solution makes gaming even more convenient and accessible. The Game Bar feature provides quick access to important information, such as current settings, performance statistics, and the ability to adjust image options. This allows for on-the-fly modification of display parameters, which is incredibly useful during intense gameplay. Despite lacking support for Dolby Vision, Samsung S90D still delivers excellent HDR image quality, allowing for full utilisation of the potential of games and films. As a result, S90D represents a unique combination of modern technologies, excellent image quality, and intuitive features, perfect for any gaming enthusiast.

[UPDATE] We have updated our 2025 Samsung TV reviews following the release of firmware version 1131, which officially restores the essential HGiG (HDR Gaming Interest Group) support.

It's really good here. The QN900F offers a full set of features that we would expect from a top-notch gaming TV – we have VRR, ALLM, Game Bar, as well as cloud gaming apps. However, the biggest standout is its proprietary motion smoother, which also works in games and – importantly – does not add noticeable input lag. This is something we won't find in other competitors. Unfortunately, there is also something concerning. This year, Samsung has clearly messed up something with its TVs. During the testing of the QN900F before its update, it had the HGIG feature, which allowed for perfect adjustment of HDR settings for consoles. However, according to our procedures, we always update the hardware to the latest version – to give the manufacturer a chance to fix any issues. And here… it went the other way.After the update, the HGIG feature disappeared from the menu, making proper configuration of the console for HDR practically impossible. It was supposed to be complete – 165Hz, four HDMI 2.1 ports, a full gaming package… but unfortunately, it turned out to be a little mishap. What a shame.