Samsung QN900D Neo QLED 8K vs Samsung QN990F

Under synthetic testing conditions, the television showcased its impressive light output, achieving 1400 nits, which is undeniably remarkable. This capability was also evident in the opening scene of Life of Pi, featuring a vibrant sunrise. However, due to certain dimming algorithm issues, some drawbacks are noticeable. For instance, in test scenes from Sicario 2 and the second scene of Life of Pi, the brightness levels dropped to an average of 500-600 nits. While this performance isn't poor by Mini LED standards, expectations were higher given the premium price of the TV. Nonetheless, the set should be commended for covering a wide colour gamut of DCI-P3 at around 96%. Although some technologies offer higher coverage, this is still a commendable result.

The Samsung QN990F belongs to the bright televisions and this is immediately evident in the tests. In measurements, it achieved around 1300 nits, which in practice allows you to enjoy movies as their creators intended. Bright scenes have the right impact, lights shine, and the feeling is truly cinematic. In standard test patterns, sequences number 1, 3, and 5 performed the best – there the brightness remained around 800-1000 nits, and the image looked very natural. In more challenging segments, it could drop to about 600 nits, but still the level remained sufficient for details to be well visible. However, it should be added that with such highly contrasted shots, the halo effect returns – the same one we mentioned regarding the blacks. Bright elements can leave a glow on dark backgrounds, and this is immediately noticeable. Since we are dealing with a QLED, the color palette is expanded and the colors look impressive. 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 results in a vibrant and attractive picture; however, competition in this and lower price segments can show even more.

The television includes a Filmmaker mode, intended to present films in the most authentic way possible, but it does come with some issues. For HD content, the white balance shows a dominance of red and blue, giving the image a pinkish hue. Conversely, for 4K HDR content, the levels of blue and red drop, resulting in a warming effect that shifts colours towards yellow tones. Colour Checker tests confirm this tendency, with colour samples visibly drifting in this direction.

In terms of brightness and contrast, the gamma is notably disrupted. The main issue is a marked spike at the start of the graph, indicating that dark details are excessively brightened, which reduces depth in the darkest parts of the image due to zone dimming. For 4K HDR content, the EOTF curve performs reasonably well but falls below the reference level, affecting the overall image dynamics.

We tested the QN990F in Filmmaker mode, which is the best available right out of the box. Right from the start, we noticed several significant errors. The biggest issue was with white balance. Due to too little blue and also incorrect proportions 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 issues with brightness management – the television had difficulty maintaining details in the smallest parts of the image, mainly due to the way it controls the backlight zones. Fortunately, Samsung offers a lot of room for adjustment when it comes to setting corrections. We know that with proper calibration, you can definitely get a lot more out of this screen.

After calibration, the Filmmaker mode truly lives up to its name. The white balance for both HD and 4K HDR content has been significantly improved, resulting in more natural and consistent colours. The pink hues in HD content and the yellow tint in 4K HDR have been effectively eliminated, enhancing the realism of the image. As a result, the television now offers much better colour reproduction, positively impacting the overall viewing experience.

However, when it comes to brightness, the gamma curve now reveals a noticeable drop at the beginning, making the darkest details more difficult to discern. The EOTF curve for 4K HDR content remains largely unchanged and still falls short of the reference level, meaning the television continues to struggle with maintaining appropriate brightness. This issue is tied to the aggressive dimming algorithm, which affects overall brightness and black levels.

Despite the limitations associated with local dimming, the television has seen an improvement in colour reproduction quality. The Color Checker test results confirm that the colour samples are now much closer to the standards, resulting in a more natural and visually pleasing image.

After performing calibration, we managed to bring the white balance into order and eliminate the previous deficiencies in blue tones. As a result, the image no longer appeared as if it had a slightly yellowish filter – whites are cleaner, and the overall presentation looks much more natural. We also managed to some extent to tame the brightness characteristic in HDR content. The television now handles maintaining details in blacks significantly 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 emphasize details in dark scenes 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 completely eliminate. Nevertheless, after calibration, the image looks much more natural, primarily due to the correct exposure of white light. The final effect is definitely more pleasant to receive and closer to what we expect from a flagship television.

The smoothness of tonal transitions in lower-quality materials looks great – the Noise Reduction function effectively smooths tonal transitions while eliminating film grain. Although removing grain is not always desired, the final effect looks very aesthetic, especially for those who prefer a cleaner image.

As for upscaling, the Samsung QN900D demonstrates the enormous capabilities of the new AI technology processor. Photos and materials in lower resolution are upscaled while retaining many details – for example, a photo with a model looks great, devoid of unnecessary jagged edges, and the branches in the background are not overly aliased.

The QN990F deserves the highest praise for its upscaling. The processor responsible for "pulling up" classic TV to 8K resolution performs quite well. While watching content in a 576p signal, we had no illusions that we would suddenly see a marketing-style miracle where the image magically transforms into crystal-clear 8K. Nevertheless, the final effect was surprisingly good; the image looked clean and clear. It's just unfortunate that the TV, like most Samsung models, has an overscan issue, which slightly cuts off the edges of the screen on the left side.

Regarding image processing, Samsung provides a feature called "noise reduction," which in theory should improve tonal transitions in older materials, where they are usually more noticeable. Unfortunately, we felt quite disappointed here. The feature works poorly – it struggles with unwanted bands and can even introduce its own artifacts. On the plus side, the TV does not eliminate film grain when using this feature, but in practice, that's little consolation since the noise reduction itself proves to be practically useless.

The Samsung QN900D is currently the fastest television in the world – quite literally. With an impressive refresh rate of 240 Hz at 4K resolution, it offers a remarkable performance that PC gamers will undoubtedly appreciate. Movie enthusiasts will also find much to admire, as Samsung provides a 10-level scale in the picture clarity settings, allowing for extensive image customisation. Users can choose whether they want the television to deliver a smoother, more fluid effect at the highest settings, or a more cinematic experience with visible frames at the lowest settings.

The QN990F can easily be called one of the fastest televisions in the world. In 4K mode, it can display images at a frequency of up to 240 Hz, which until now has been more associated with gaming monitors than with televisions in the living room. However, in everyday viewing, what matters more is how it handles 8K signals at 120 Hz – and it performs very well here too. Motion remains smooth, and the television manages without a hitch even with the most demanding content. Additionally, there is a motion smoother, called "Picture Clarity." With it, you can adjust the image to your own preferences – leave a slight cinematic stutter or switch to maximum smoothness, which works great, for instance, in sports broadcasts.

The Samsung QN900D is excellent for console gaming, packed with features gamers will truly appreciate. It comes with 4 HDMI 2.1 ports, but they do not support the full 48 Gb/s bandwidth. However, for most users, this bandwidth is more than adequate. The TV also supports Auto Low Latency Mode (ALLM) and Variable Refresh Rate (VRR), which ensures smoother gameplay and eliminates screen tearing during fast-paced action. Features like G-Sync and FreeSync are also supported, enhancing compatibility with both consoles and PCs equipped with compatible graphics cards, helping to reduce stuttering and provide a smooth image.

A standout feature exclusive to Samsung is the Xbox Game Pass app, allowing users to stream games directly to the TV without needing an Xbox console. This is a very convenient option for gamers who want to enjoy their favourite games without purchasing additional hardware. The Samsung QN900D also features a Game Bar, which provides quick access to gaming-related settings, making it easy to configure the TV for optimal performance.

The Auto Motion Plus Game function offers a special motion smoothing mode that increases the frame rate (up to 4K@60Hz). Importantly, this does not raise input lag significantly, so players can enjoy smoother visuals without sacrificing responsiveness. With all these features, the Samsung QN900D is a top-tier choice for gamers seeking a television with the best possible specifications.

It must be said directly – the QN990F is one of those TVs that screams it was designed with gamers in mind. Samsung has been developing its gaming solutions for years, but here we have a true package. Sure, the lack of Dolby Vision support in games is a downside that will always come up in discussions. However, apart from that, the list of features is truly impressive. To start, we have Game Bar – a handy menu that allows you to quickly check and change game-related settings. You can see, for example, VRR is turned on, the frame rate, or the aspect ratio settings. It's like a small "dashboard," allowing you not to dig deep into the menu to make adjustments. Speaking of VRR: yes, variable refresh rate is present here and works flawlessly. Additionally, there's ALLM, which automatically switches the TV 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 number of ports makes the biggest impression. Four wireless HDMI 2.1 ports are already great news because you don't have to choose whether to connect the console, the receiver, or maybe even the PC. There's plenty of room here for everything. And if we add an additional micro HDMI (which we recommend connecting directly to consoles), hidden in the housing, we practically have five inputs in full 2.1 standard. Add to that support for high refresh rates – 120 Hz in 8K or even 240 Hz in 4K – and we get a TV that not only keeps up with the new consoles but also feels ready for consoles that are yet to come.