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I'm looking into buying an Asus pg65uq when it's available, but I noticed something strange - it claims to support HDR10 while at the same time only supporting 8bit color. Doesn't those two contradict each other?

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An 8-bit display can use FRC to expand its perceived color range. It essentially dithers a pixel between two colors in time rather than with neighboring pixels.

Many monitors do this, in fact a lot of displays that support "16.7 Million Colors" (24-bit Color) are actually 6-bit panels using FRC.

If you are trying to decide between monitors, I wouldn't let this detail become a deciding factor. You are very likely looking at a monitor right now that uses FRC and you may not have noticed. It would be hard for most people to notice the quality improvement of a true 10-bit panel without FRC vs 8-bit with FRC.

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  • Doesn't that mean the display cannot be advertised as supporting HDR10? It's even hdr 1000 certified when the standard requires 10bit depth. – krojew Sep 17 '19 at 20:23
  • @krojew, If I understand the HDR10 spec correctly, it is only a standard for the transport of HDR content to a display. The display itself can support the signal, but then show it on a panel that has lower dynamic range than the signal. In this case an 8-bit panel + FRC is sufficient to present the HDR10 content with a dynamic range that is close enough to a true 10-bit panel. – Romen Sep 17 '19 at 20:25
  • You might be right. If I understand displayhdr.org/performance-criteria-cts1-1 correctly, frc is permitted. – krojew Sep 17 '19 at 20:33
  • @krojew, It is good that this display goes as far as getting the DisplayHDR 1000 certification. That is the label you need to look for to ensure it actually has a decent color space and dynamic range. A display that just says "HDR10" could get away with anything as long as it supports the input signal. – Romen Sep 17 '19 at 20:43

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