Forum Discussion
Question about VSYNC not reliably working
I've been wondering why sometimes vsync doesn't always seem to work even when it's specified to be on and I'm running an application full screen. This is something I've noticed on both ATI and NVIDIA...
"renderingpipeline" wrote:
As soon as you have two displays VSync will break on one of them. The displays have there own clock and the GPU can adjust to that clock but not the other way around (thats one thing that G-Sync will fix). So if you have two screens and they are not in sync by chance, you will have tearing on one of them. On Linux you can chose which screen to sync to, maybe you don't have that option on windows - in that case only use the Rift.
Thanks for the explanation, that makes a lot of sense. In my scenario I'm cloning the game/desktop to my Sony monitor and the Rift but it can only sync to one. They are both set to 60hz but which one it winds up v-syncing to is anyone's guess each time you run an app which is why it seems to work some of the time but not others.