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HDR Peak Brightness !

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Hi all,

After enabling HDR, I noticed Windows 11 reporting that Peak Brightness is 1,499 nits
Display in use is LG 32UL750 (According to specification should be HDR600 which I guess peak brightness should be 600 nits)

Has anyone else seen this?
Is the peak brightness same for every monitor/display?
My understanding is that peak brightness is different for every display

Kindly post screen shots of peak brightness and display name

My screen snap below

Screenshot 2021-11-03 101758.png
 
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If Windows does not recognize any HDR Certification, it displays 1499 nits if you enable HDR. But I don´t know if windows does recognize any of the VESA HDR Certificates. Besides that HDR should work on your Monitor.
 
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I'm guessing HDR600 would be the average brightness, not the peak brightness, also unless it's certified there is no guarantee it will work.
 
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Use custom resolution utility, open the CTA-861 extension block and look for an HDR Static Metadata block. If there isn't one then your monitor isn't telling Windows through EDID what the max/avg/min luminance is in which case it will default to 1499 nits. You can actually add metadata manually to trick windows into showing custom luminance values. I believe it uses this to scale auto-hdr, though HDR isn't really worth using on that monitor.

My PG35VQ does have HDR static metadata that Windows recognizes. My P75QX-H1 doesn't have any metadata and by default windows shows 1499 nits peak brightness so I edited it manually.
1636365108492.png
1636365254422.png


I'm guessing HDR600 would be the average brightness, not the peak brightness, also unless it's certified there is no guarantee it will work.
If it's not certified it will work it just won't look good. Even if it is certified it still may not look good. The original Odyssey G9 was DisplayHDR1000 certified and was terrible for HDR. TVs typically aren't DisplayHDR certified and often give a much better experience for the money than monitors do.
 
Last edited:

bug

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I'm guessing HDR600 would be the average brightness, not the peak brightness, also unless it's certified there is no guarantee it will work.
It's neither. White brightness is ~120nits, otherwise you eyes will hurt. 600 is the minimum required to get the HDR600 certification, but no monitor will do exactly 600nits, they usually go quite a bit above that, but not high enough to qualify for DisplayHDR1000.

Edit: Peak brightness also cannot be sustained, it's just temporary (a little like a CPU turbo boost). And fwiw, this particular monitor can't do HDR anyway, it's edge lit.
 
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