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What are you using fast sync for? - Page 2

post #11 of 28
Quote:
Originally Posted by aliquis View Post

But it is not unavoidable, if you render lets say for example at constant 31 fps or even 35 fps on a 60hz monitor, the image will be a lot smoother if you use vsync to drop to a constant 30 fps (and have an even frame pacing, 1 frame every 2 refresh periods) instead of fastsync, because fast sync will introduce additional judder and stutter in this case.
Fast-Sync wasn't designed to fix frame-time invariance or judder.
post #12 of 28
I dont know if you are serious. are you trying to pull my leg ?

Fast sync does exactly fix that, but you have to use very high framerates because the more fps the lower the framepacing error will be and therefor the smoother the image.
post #13 of 28
Fast-Sync can only guarantee no frame-tearing at the least cost to input latency. If you want judder-free frame-pacing, you'll need adaptive sync technology like G-Sync or Free-Sync.
post #14 of 28
If cap 60 fps on 60hz monitor theres no framepacing error
post #15 of 28
Well, everyone can of course believe what they want, but consider, Nvidia themselves state that they don't recommend to use fastsync on low fps but only when you have very high fps ( i stated the reasons).
post #16 of 28
Quote:
Originally Posted by aliquis View Post

Well, everyone can of course believe what they want, but consider, Nvidia themselves state that they don't recommend to use fastsync on low fps but only when you have very high fps ( i stated the reasons).

make the test on nvidia pendulum patterns test. do vsync off vsync on. fast sync on uncapped and fast sync on 60 fps cap. see for yourself.
post #17 of 28
Just tested it on my 60hz, it runs smooth for a while(sometimes up to like 10sec or more) but every now and then a micro stutter comes, and then it runs smooth for a while longer until the next one.

The whole point of fastsync is to unlock the rendering from the monitor refresh, while still keeping up a tear free image, therefore reducing the inputlag. But this introduces frame pacing problems .... which you can only mitigate by keeping up very high fps.
Edited by aliquis - 10/4/16 at 2:01pm
post #18 of 28
You have Power setting on NVidia control set to maximum performace?
post #19 of 28
Set up fast sync as global setting in your driver and then go in the demo, turn on the test pattern and switch the fps to constant 60.

Then wait, even if your image is smooth, you will see a single micro stutter after a while and then it will be smooth for a while before the next.

And yes, my settings are on max performance, although it has nothing to do with that.

You simply have to get a micro stutter after a while, because your frame rendering is not locked to the refresh rate, do you understand ? its impossible that you run in this setting for a long time without getting a stutter every now and then.
Edited by aliquis - 10/4/16 at 2:09pm
post #20 of 28
its perfect smooth here.
please, try cap 60fps on nvidia inspector
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