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We had a discussion on this in #gpu on our Zulip. The short answer is that if the screen is updating at 60fps, then FreeSync and its cousins are effectively a n
by raphlinus 6y ago
We had a discussion on this in #gpu on our Zulip. The short answer is that if the screen is updating at 60fps, then FreeSync and its cousins are effectively a no-op. If the display is mostly idle, then there is potentially latency benefit in withholding scanout until triggered by a keypress. Older revisions of FreeSync have a "minimum frame rate" which actually doesn't buy you much; 40Hz is common: https://www.amd.com/en/products/freesync-monitors https://www.amd.com/en/products/freesync-monitors
- amluto 6y agoI would expect that VRR helps if you try to make your compositor only start compositing as late as possible while still finishing on time. With VRR, one could delay the next frame slightly if the deadline gets missed. This would work even when rendering at 60Hz.
- medlyyy 6y agoProblem is that causes jitter which is extremely noticeable even in small amounts. You can't have smooth animations if the frame timing is constantly varying.