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LegitHyperbole said:
JRPGfan said:

However its slightly more demanding on the gpu (HDR tonemapping), and on the screen (monitor/tv) it usually uses more power than a screen without.
*edit:  They keep makeing advances in technology.... a few years ago, there was a bigger differnce between HDR use and not for powerconsumption, than today.

I never realised it took more graphics power.

It doesn't (or the additional power it is so negligible, it is not measurable).

I tested it with the in-game benchmark of "Marvel's Guardian of the Galaxy" on my Steam Deck OLED.
The darker screenshots are with "HDR on".

"low" preset: both 45 fps on average, "HDR on" with a very tiny performance advantage (0.1 milliseconds CPU frametimes + 0.1 milliseconds GPU frametimes), "HDR on" rendered 2 more frames (0.1%):

"high" preset: both 40 fps on average, "HDR off" with a very tiny performance advantage (0.2 milliseconds CPU frametimes, 0.1 milliseconds GPU frametimes), "HDR off" rendered 5 more frames (0.2%):