>>347444732
SteamVR reduces your framerate in steps (max 120 = 90, 60, 40, max 90 = 90, 45, or something), so it always picks divisions of maximum refresh rate it's set to run on. I imagine one case could be that your old gpu wasn't syncing to correct refresh rate because it had no async capabilities. Have you switched from, let's say, something as old as gtx7xx series? Also, which headset do you have, and if you can set refresh rate, what is it set to?