akirru wrote:
Thanks for getting back to me
jorimt
Interesting and as you said I think it is an inconsistent variable. I get worse performance in some games and still no noticeable change in input lag. I certainly think capping the framerate below the threshold of G-sync might negate any real input lag anyway. I have it capped at "141" on Rivatuner and most games feel butter smooth. I mean I still get increased lag when I have a massive drop in fps. But that isn't the fault of G-sync.
EDIT: Something I have noticed but not really thoroughly looked into. Is the effect your mouse can have on input lag and Gsync itself. For example I have a g400s which stutters a lot. And a rat5 (pretty bad for competitive gaming as it has a laser) which is really smooth. But overall the g400s has less input lag.
Yes, as my input latency tests show, a 2-3 frame cap below your max refresh rate is enough to prevent additonal input latency with G-Sync + v-sync on. As stated in an edit on my OP, however, RTSS likely adds 1 frame of input latency over in-game caps, which add none. So in-game framerate limiters are still preferred.
I will be retesting for input latency across a wide range of scenarios in the coming weeks, and with improved testing equipment, so stay tuned.
Regarding frametime spikes (aka "massive fps drops"), with standalone double-buffer v-sync (G-Sync disabled), there will be long halts during frametime spikes, and with G-Sync + v-sync on, you'll get shorter halts, but they will still be there, as the frametime compensation mechanism suspends the affect frame just long enough to prevent tearing. With G-Sync + v-sync off/standlone v-sync off, you're going to see a complete middle tearline, but in most instance, with less/shorter halts.
As for the difference in input latency between your two mice, it's likely the polling rate. For high refresh rates and G-Sync, the higher the polling rate, the better. If either of your mice has a "1000 Hz" polling rate option, you'll need to enable that for the lowest input latency and optimal response.
capcomasd wrote:Excelent post jorimt, you've answered many doubts to many gamers like me. However, after reading all this post I still have a question: Having G-SYNC Activated + V-SYNC ON in NVIDIA CONTROL PANEL, I should turn ON or OFF V SYNC IN-GAME? Does it matter for example if I have V SYNC ON in NVIDIA CONTROL PANEL and OFF IN-GAME?
By the way I play mostly Battlefield 1 in a Dell S2716DG G-SYNC monitor and GTX 1080.
As RealNC stated, Nvidia Control Panel v-sync is the safest bet.
However, as I noted in my OP, there are (extremely) rare occasions where only the in-game v-sync setting will work for a given game, in which case you should enable it in-game instead.
An easy way to tell if the Nvidia Control Panel v-sync setting isn't working, is if you see tearing at any point with G-Sync enabled.
But yes, 99% of the time for G-Sync: v-sync on in Nvidia Control Panel, v-sync off in-game.