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Gsync and Vsync

Nutty667 said:
Yeah actually you're right. Did some testing last night and yes with vsync off you get slightly better frame-rate and therefore latency due to frame-variances when you get frames that complete faster.
Basically Vsync means frames will never complete in less than (1000 / max frame rate) milliseconds. Sometimes they do, and with vsync off, the next frame is started sooner.

However, this does come at the expense of tearing, and at 240fps, I just don't think it's worth it. The amount of latency saved is fractions of a millisecond. Given even F1 drivers reaction times are in the order of 200 milliseconds, a fraction of a millisecond of saved latency is just pointless given it looks worse.
Click to expand...

Also worth mentioning is that if a game has Nvidia reflex enabled and you turn on vsync it will be capped under the Hz limit to prevent input lag. So for me at 120 Hz games get capped at 116 :) I have never used more than 144Hz screen but I wouldn't be surprised if the vsync latency penalty can be ignored on really high refresh rate screens such as you suggest on 240Hz. I always found Vsync latency annoying at 120/144Hz and horrid at 60 Hz :p
 
I probably misunderstood somewhere along the way but I thought gsync was a wholesale replacement of vsync, yet I see so many people running both together, seems redundant to me.

I have vsync off everywhere I can and set an FPS cap of -1 below max refresh and have never had tearing since 2018, across two different panels using this method.
 
Gsync and Freesync are just ways of making Vsync timing dynamic based on the games FPS's, rather than it being fixed at say 60hz, 90hz, 144hz etc.

The main reason it was introduced was to avoid stuttery frame-rates when you dipped under the fixed monitor rate if you have Vsync on, and without having to resort to turning Vsync off which can introduce tearing.

There is also enhanced sync (on AMD, I'm sure there is some equivalent on NV) which should give the kind of latency of Vsync off, without any tearing possibility.
 
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