Samsung M80H vs Philips OLED811

The M80H is not among the brightest TVs. Its peak brightness is around 350 nits and we saw similar results in most of our test scenes. That is not enough to achieve truly striking HDR; bright highlights lack the necessary punch and the overall image is a bit too dark. In practice HDR on the M80H resembles a well-presented SDR image more than noticeably more dynamic material with a wide brightness range. The image can still look acceptable, but it is hard to speak of strong specular highlights, clearly glowing light sources or an effect that immediately distinguishes HDR from ordinary content.

Colours

One of the M80H's stronger points is its colours. The TV uses a filter based on PFS backlighting, which allows it to display a much wider colour gamut than a standard LCD screen without filters. Our measurements confirm this – the M80H covers around 96% of the DCI-P3 gamut and 72% of BT.2020. Those are really good figures, which allow colours to be deeply saturated. Samsung's approach here is interesting. The M80H is not part of the QLED family, even though in terms of colour it is practically indistinguishable from models carrying that badge. From an image-quality point of view it doesn't really matter though — the colours are simply good.

Philips OLED811 uses a new generation of WOLED EX panels, also found in models such as the LG C6 and Samsung S90H. After calibration we measured around 1500 nits, which is a very good result for an OLED TV. You can see this clearly in films and series. All kinds of bright flashes have the right intensity, especially when they appear against a dark background. In such scenes the OLED811 can deliver truly impressive HDR. Of course, that does not mean you will see that level of brightness in every shot. When the screen is filled with a large amount of white or a wide explosion, brightness falls to around 600 nits. That is still a good result, but those scenes no longer have the same punch as small, bright elements on a dark background. This is a known limitation of OLEDs and the OLED811 is no exception.

Colours

Aside from HDR brightness, colours also matter and here Philips performs very well. It covers almost the entire DCI-P3 gamut, which contains most of the colours used in HDR films and series. You get saturated reds and lush greens, and when watching it’s hard to find major faults in that respect. It looks a little worse with the much wider BT.2020 gamut, whose most saturated shades are already out of reach for this panel. There is also the issue of the white subpixel that the WOLED panel uses to boost brightness. With very bright colours you can see a certain washout: the colour is bright but loses some of its intensity. It is precisely in such situations that QD-OLED panels from Samsung Display have the advantage. However, in most films and series this is not something that will immediately stand out.

Filmmaker Mode is set fairly well out of the box, although it falls short of perfection. In SDR material the most noticeable issue is an excess of red in the white balance, which makes the image appear a little warmer than it should. HDR content has a similar character. As for the brightness response, in SDR the gamma stays close to the target value for most of the range. Small deviations are mainly visible in darker areas, which in places are a bit too crushed. In HDR the darkest details are slightly lifted, while from around 65% brightness the image begins to be slightly darkened. This is largely due to the way the TV controls its brightness. Overall, Filmmaker Mode looks pretty good straight out of the box, but the picture can still be improved.

Film mode on the Philips OLED811 is sensibly set up straight out of the box. Most colour errors remain small, both in SDR and HDR, so you can sit down to watch without adjusting the settings first. There are no major inaccuracies that would immediately distract from the film. It falls a little short of perfection, though. The white balance shows a slight lack of red compared with green, so whites and greys can have a faint greenish tint. It is not a strong colour cast, but measurements clearly show it. There are also minor brightness deviations in SDR: some parts of the image are slightly brightened, and the darkest shades are not always reproduced evenly. In HDR the TV sticks much closer to the reference, although in places it gently lifts detail from the shadows. These are generally areas that could be improved. The factory film mode provides a good starting point, and calibration will reveal how much more can be gained from it.

After calibration, the M80H fares very well, especially with the most ordinary SDR content. Regular broadcast TV, YouTube and films watched without HDR can look very good on it. After correcting the white balance the errors are small, although sometimes we can still see that the TV tends to overdo the most saturated reds. In HDR it is also possible to improve the picture and correct its main faults, but it is not at the level of pricier models. Samsung quite heavily restricts colour adjustment in HDR, so in many areas we have to accept what the TV offers out of the box. Calibration lets us improve some parameters, but we are no longer able to change the overall character of the M80H's image.

After calibration the Philips OLED811 produces an image very close to the reference. We managed to correct the white balance and eliminate the slight tint visible in the factory settings. Errors in the Color Checker measurements for SDR and HDR fell to around 1 to 2, and many samples are even below 1. That's a level at which differences from the reference image are hard to spot with the naked eye. We also improved the gamma, and only in the brightest whites is there a slight brightening remaining. In HDR the EOTF curve also tracks the reference closely, although the TV still tends to gently boost the brightness of small elements, such as stars or on-screen text. This gives the picture a little extra sparkle that shouldn't be there, but otherwise there's little to fault. It was already good out of the box, and after calibration we managed to refine most of the remaining shortcomings.

Although the M80H is positioned fairly low in Samsung's range, the manufacturer equipped it with one of its stronger processors, the NQ4 AI Gen2. The same chip can be found, for example, in Neo QLED TVs and the lower-tier S85H OLED. That is good news, because when it comes to improving weaker sources the processor performs really well. Upscaling is the strongest point. Low-resolution content is displayed correctly and edges do not look overly jagged. Of course the TV will not create details that are not present in the source, but regular broadcast TV and older recordings look decent on it. One drawback is the overscan effect, that is edge cropping, which cannot be completely turned off. The tonal transition smoothing function, the so-called noise reduction, also works well. The processor can effectively reduce visible traces of heavy compression, but it does not do this without side effects. At higher settings it may over-smooth the image, remove some fine detail and even eliminate film grain. For that reason we recommend using this function mainly for content that really suffers from strong compression and posterisation.

OLED811 handles lower-quality material reasonably well, though it falls well short of perfection. The "Banding reduction" function helps to smooth tonal transitions and on the low setting gives a fairly good result. It does not remove bands between shades as effectively as similar solutions from some competitors, but at least it does not introduce new artefacts in the process. This is a sensible setting for everyday viewing. There is still some dissatisfaction, however, because the MediaTek Pentonic 800 chipset used here can, in other manufacturers' implementations, cope with the effects of heavy compression more effectively even at similarly low settings. Much therefore depends on how a given manufacturer makes use of its capabilities. We have a few more comments about the upscaling to 4K. There is a lot of detail, but the overall image looks rather soft. Edges are heavily smoothed, which robs the picture of a bit of sharpness and clarity. This can be partly corrected with the sharpness slider in the menu, though that will merely accentuate outlines rather than recover detail. On the plus side, there is no overscan; even with an SD signal the TV does not crop the edges of the picture.

The M80H performs very well for watching sport and for gaming. The TV is fitted with a panel offering a refresh rate of up to 144 Hz at 4K, and when the resolution is lowered to Full HD it can even support 240 Hz. PC gamers will benefit most from the latter.

The panel also handles content displayed at 120 Hz well, which is particularly important for console gaming. The high refresh rate is also useful when watching sport, and motion blur is relatively limited. That matters because VA panels are not known for top results in this area. With the M80H, fast-moving objects do not show pronounced smearing.

In terms of motion handling the OLED811 performs excellently. At 120 Hz, which is useful for console gaming and watching sport, the picture stays clear and moving objects do not leave noticeable smears. The fast response of OLED pixels helps here; this is clear in the UFO test, even on dark backgrounds. There are also motion smoothing controls. For films you can adjust the level of smoothing to suit your taste, ranging from preserving a cinematic character to much smoother motion. A separate blur reduction setting is useful for fast-paced material such as sports broadcasts.

The M80H could be a very good choice for gamers on a slightly smaller budget. In terms of features it offers essentially the same as far more expensive Samsung TVs. All three HDMI ports support the 2.1 standard, so even if one is taken by a soundbar connected via eARC there is still room for a PC and consoles. There is also VRR that runs up to 144 Hz at 4K and up to 240 Hz at Full HD. Samsung has also correctly implemented HGiG, so after performing HDR calibration on a console games are properly matched to the screen’s capabilities. This won't make the M80H any brighter, but at least it won't unnecessarily crush the brightest parts of the image. There's also a Game Bar for quick access to key settings and a Gaming Hub that lets you play in the cloud without a console. The M80H also offers Game Motion Plus, which creates additional frames and improves the smoothness of games running at 30 or 60 fps. Input lag then rises to around 59 ms, but is still roughly three times lower than with ordinary motion smoothing on TVs from other manufacturers. We wouldn't really recommend it for online gaming, but in more relaxed titles it can perform very well.

OLED811 has almost everything you could expect from a TV for gaming. It supports 120 Hz at Full HD, 1440p and 4K, and when connected to a PC it can reach 165 Hz. It also has VRR, which helps prevent screen tearing when frame rates fluctuate, and ALLM, which automatically switches to game mode. So you don't have to dig into the settings every time you power up your console.

Another plus is that HGiG works correctly, so once HDR is set on the console the TV doesn't apply its own changes to image brightness. There's also a Game Bar to check signal parameters and quickly change settings useful while gaming. The list even includes Dolby Vision for gaming, but there is a significant catch, which you can read about below.