Samsung QN900D Neo QLED 8K vs Samsung QN990F

The Samsung QN900D easily showcases its high capabilities in light production during synthetic tests – 1400 nits is truly an impressive result. It also demonstrated these capabilities in the first scene of the movie "Life of Pi," where we see a brilliant burst of the rising sun. However, due to issues with the dimming algorithm, some problems can be observed here. In the test scenes from "Sicario 2" and the second scene from "Life of Pi," these values are not as high, averaging around 500-600 nits. While this may not be the worst result among Mini LED TVs, more could be expected given the price of the television. Nevertheless, the television deserves praise for covering a wide colour gamut of DCP P3 at 96%. Although there are technologies offering higher values, this result is still satisfactory.

Samsung QN990F is one of the bright televisions, and this is immediately apparent in tests. In measurements, it achieved around 1300 nits, which in practice allows you to enjoy films as their creators intended. Bright scenes have the right strength, lights shine, and the impression is truly cinematic. In standard test patterns, sequences number 1, 3, and 5 performed the best – there, brightness remained around 800-1000 nits, and the image looked very natural. In more difficult segments, it could dip to around 600 nits, but the level was still sufficient for details to be clearly visible. However, it should be added that with such highly contrasted shots, the halo effect returns – the same one we mentioned regarding blacks. Bright elements can leave a glow on dark backgrounds, and this is immediately noticeable. As we are dealing with a QLED, the colour palette is expanded, and the colours present themselves impressively. The problem is that with such a flagship model, we expected better numbers. 91% coverage of DCI-P3 and about 67% BT.2020 are results that can be considered solid but not outstanding. This gives an image that is vibrant and appealing; however, the competition in this and lower price ranges can show even more.

The QN900D television offers a Filmmaker mode that is designed to watch movies in the most natural way possible; however, this mode is not without its flaws. For HD content, the white balance shows a dominance of red and blue, which causes the image to shift towards pink hues. In contrast, for 4K HDR content, the situation is reversed – the reduction of blue and red levels results in warmer scenes and a shift towards yellow tones. This is confirmed by Color Checker tests, which clearly show that the colour samples veer in that direction.

When it comes to brightness and the associated contrast, the gamma is significantly distorted. The biggest issue is a noticeable jump at the beginning of the curve, indicating that dark details are overly brightened, causing the image to lose depth in the darkest areas - this is due to local dimming. For 4K HDR materials, the EOTF curve looks quite good, but it remains below the reference level, impacting the overall dynamics of the image.

We tested the QN990F in Filmmaker mode, which is the best out-of-the-box setting available. Right from the start, we noticed a few significant issues. The biggest problem was with white balance. Due to too little blue, as well as incorrect ratios between red and blue, the image—especially in scenes with a lot of white—appeared too yellow, and at times even orange. On the Color Checker palette, these errors didn't look dramatic as they hovered around a value of 4, but in everyday viewing, especially with strong whites, they were most noticeable. We also noticed problems with brightness management—the TV struggled to maintain details in the smallest parts of the image, mainly due to how it manages backlight zones. Fortunately, Samsung provides plenty of room for adjustment when it comes to setting corrections. We know that with proper calibration, much more can be extracted from this screen.

After calibration, the Filmmaker mode can truly be called worthy of its name. The white balance for both HD and 4K HDR content has significantly improved, resulting in colours that are more natural and consistent. The image has gained in realism, with pink hues in HD content effectively eliminated, as well as the yellow haze in 4K HDR content. Thanks to the calibration, the television now offers much better colour reproduction, positively impacting the viewing experience.

When it comes to brightness, the situation with gamma is now the opposite – a clear drop is visible at the beginning of the graph, making the darkest details harder to discern. The EOTF curve for 4K HDR content has remained largely unchanged and is still below the reference level, indicating that the television still struggles to maintain adequate brightness. This is related to the aggressive dimming algorithm that affects the overall brightness of the image. You can see how the television fights to maintain high brightness or perfect black.

Despite the limitations associated with local dimming, the Samsung QN900D has improved in colour reproduction quality, as confirmed by the Color Checker test results – the colour samples are now much closer to the references, making the image more natural and pleasant to the eye.

After carrying out the calibration, we managed to bring the white balance into order and eliminate the earlier shortcomings in shades of blue. As a result, the picture no longer looked like it had a slight yellowish filter – the whites are cleaner, and the whole thing presents itself much more naturally. We also managed to tame the brightness characteristic in HDR content to some extent. The television now handles maintaining detail in blacks much better and does not lose them as much as before. However, when we look at the EOTF curve and how the QN990F reproduces brightness in films, it is evident that it still tends to accentuate details in dark areas more strongly. This is a characteristic feature of Mini-LED technology and, more specifically, how it is managed by the QN990F, which is practically impossible to eliminate completely. Despite this, after calibration, the picture looks significantly more natural, mainly due to the correct exposure of white light. The final effect is definitely more pleasant to the eye and closer to what we expect from a flagship television.

The fluidity of tonal transitions in lower-quality materials looks fantastic – the Noise Reduction feature very effectively smooths out tonal transitions while getting rid of film grain. Although the removal of grain isn't always desirable, the overall final effect is very aesthetically pleasing, especially for those who prefer a cleaner image.

When it comes to upscaling, or image scaling, QN900D shows the tremendous capabilities of the new processor with AI technology. Photos and materials in lower resolution are scaled while retaining many details – for example, a photo with a model looks amazing, free of unnecessary jagged edges, and the branches in the background are not overly serrated.

The QN990F deserves the highest praise for its upscaling capabilities. The processor responsible for 'lifting' classic TV to 8K resolution does a really decent job. Watching footage in 576p, we had no illusions that we would suddenly see a miraculous transformation like in an advertisement, where the image magically turns into crystal-clear 8K. Nevertheless, the final effect was surprisingly good; the picture looked clean and sharp. It's just a shame that the TV, like most Samsung models, has an overscan issue, which slightly cuts off the edges of the screen from the left side.

When it comes to image processing, Samsung offers a feature called "noise reduction," which in theory should improve tonal transitions in older materials, where they are usually more noticeable. Unfortunately, here we felt quite disappointed. The feature performs poorly – it struggles with unwanted banding and can even introduce its own artifacts. On the plus side, it’s worth noting that the TV doesn’t remove film grain when using this feature, but in practice, that’s a poor consolation when the noise reduction itself turns out to be practically useless.

Samsung QN900D is currently the fastest television in the world – literally. A refresh rate of 240 Hz in 4K resolution is an amazing value that PC gamers will surely appreciate. As for movie fans, they won't be disappointed either – Samsung offers a 10-level scale in the picture clarity settings, allowing users to adjust the image. We can choose whether the television should provide a smoother, theatrical effect at the highest settings, or a more cinematic one, with a visible frame, at the lowest settings.

QN990F can easily be called one of the fastest TVs in the world. In 4K mode, it can display images at a frequency of up to 240 Hz, which until now was more associated with gaming monitors than with living room TVs. However, in everyday viewing, what's more important is how it handles an 8K signal at 120 Hz – and it performs very well here too. Motion remains smooth, and the TV handles even the most demanding content without breaking a sweat. Additionally, there's the motion smoother, or "Image Clarity." Thanks to this, you can adjust the picture to your preferences – leave it slightly cinematic with a bit of judder or switch to maximum smoothness, which works brilliantly for things like sports broadcasts.

Samsung QN900D is a television that offers excellent compatibility with consoles and a range of features that gamers will appreciate. It has 4 HDMI 2.1 ports, although unfortunately without the full bandwidth of 48 Gb/s. Nonetheless, for the average user, this is more than sufficient. Additionally, the television supports Auto Low Latency Mode (ALLM) and Variable Refresh Rate (VRR), which means smoother images and no screen tearing during dynamic gameplay. The G-Sync and FreeSync technologies are also noteworthy, providing optimal compatibility with consoles and computers equipped with the appropriate graphics cards, minimising stuttering effects and ensuring a smooth picture.

One of the unique features available only in Samsung televisions is the Xbox Game Pass app, which allows for game streaming without the need for a console. This is a very convenient solution that lets you enjoy your favourite games without having to purchase additional hardware. Furthermore, the QN900D has Game Bar – a special panel that enables quick access to gaming-related settings, making game mode setup quick and intuitive.

Another interesting feature is the Auto Motion Plus Game function, which is a special motion smoothing mode that can increase the frame rate (works up to a maximum of 4K@60Hz). Importantly, this does not cause a significant increase in input lag, allowing players to enjoy both greater image fluidity. All these features make the Samsung QN900D an excellent choice for those looking for a gaming television with the highest possible parameters.

It has to be said straightforwardly – the QN990F is one of those televisions that scream they were designed with gamers in mind. Samsung has been developing its gaming solutions for years, but here we have a true package. Sure, it lacks Dolby Vision support in games, which is a downside that will always come up in discussions. However, aside from that, the list of features is truly impressive. To start, we have the Game Bar – a handy menu that allows you to quickly check and change game-related settings. You can see things like VRR enabled, frame rate, or aspect ratio settings there. It's like a little “dashboard” so you don’t have to dig deep into the menu to fix something. Since the word VRR was mentioned: yes, variable refresh rate is present here and works flawlessly. Plus, there's ALLM, which automatically switches the television to game mode as soon as the console is turned on. These may seem like small details, but together they make using the QN990F simply convenient and hassle-free.

However, the greatest impression comes from the number of ports. Four wireless HDMI 2.1 ports as standard is already great news, as there's no need to choose whether to connect the console, the receiver, or maybe even the PC. There's comfortably enough room for everything here. And if we add another micro HDMI (which we recommend connecting directly to the console), hidden within the casing, then in practice we have five inputs in full 2.1 standard. Let’s also add support for high refresh rates – 120 Hz in 8K or even 240 Hz in 4K – and we get a television that not only keeps up with the new consoles but also feels ready for consoles that aren’t even out yet.