G-Sync + V-sync, on or off?

[Sphio]

Hey, I have an Acer X34A Display that has G-sync.
Since this is the very first monitor that I've owned that has G-sync enabled I'm a bit curious. Should I Leave V-sync on with G-sync or is it recommended I turn V-sync off and then let G-sync do it's "thing"?

Also should V-sync be enabled in nVidia control panel and off in games? How does all this work? I've looked around the web, but I seem to find a lot of conflicting answers. Could anyone shed light on this for me? would be forever thankful!

[WereCat]

No, dont leave V-Sync on just limit your FPS a bit under your max refresh rate with Riva Tuner.. dont use NVIDIA Inspector for that as taht for some reason introduces input lag as big as using V-Sync.

 

[johnt]

2 minutes ago, WereCat said:

No, dont leave V-Sync on just limit your FPS a bit under your max refresh rate with Riva Tuner.. dont use NVIDIA Inspector for that as taht for some reason introduces input lag as big as using V-Sync.

Why does he need to set his max refresh rate at all?

[WereCat]

42 minutes ago, JohnT said:

Why does he need to set his max refresh rate at all?

Because G-Sync doesent work with FPS above max Hz of the monitor, thas why it was originaly designed to work with V-Sync ON as V-Sync caps your FPS at max refresh rate.

[johnt]

39 minutes ago, Sphio said:

Hey, I have an Acer X34A Display that has G-sync.
Since this is the very first monitor that I've owned that has G-sync enabled I'm a bit curious. Should I Leave V-sync on with G-sync or is it recommended I turn V-sync off and then let G-sync do it's "thing"?

Also should V-sync be enabled in nVidia control panel and off in games? How does all this work? I've looked around the web, but I seem to find a lot of conflicting answers. Could anyone shed light on this for me? would be forever thankful!

You may already know some of this, but G-sync is a variable refresh rate technology. It operates over 30 fps to keep your screen from tearing caused by inconsistent frame rates generated by your GPU. There are some differences between Maxwell and Pascal GPUs though. Maxwell and older GPUs (900 and earlier series) do not prevent tearing when your frame rates are over your monitor's maximum refresh rate. Which is presumably why some people recommend to enable V-Sync. But Pascal GPUs (1000 series) introduced the concept of "FastSync," which can prevent tearing over your monitor's refresh rate. Thus enabling V-Sync is no longer necessary.

 

V-Sync locks your frame rates to the refresh rate of your monitor. Typically 60 fps on *most* monitors, but in your case, it would lock to 100 Hz if you're "overclocking" your display. The problem with 100 Hz is that it's not a realistic expectation while gaming at 3440x1440 ultra settings with a single card (in most games, anyway). So V-Sync cuts your frame rates in half if it cannot sustain 100 fps, and it prevents tearing at 50 Hz. Unfortunately it does all of this processing at the expense of user input. And there is no in between. It's either 100 Hz or 50 Hz. So your input lag will be bouncing around in addition to the extra time required by V-Sync. It's fine for RPGs and a few others types, but higher frame rates are valuable in nearly all scenarios: online competitive, first person shooter, racing.

 

My recommendation is to disable V-Sync. If you like the results then keep playing. If you witness tearing, turn up your graphics settings to reduce your frame rates so that G-Sync is enabled (on older cards). If you can't turn up the graphics enough, then use GeForce Experience to increase the resolution with DSR.

[johnt]

Apparently FastSync is available on Maxwell also

 

https://www.reddit.com/r/nvidia/comments/4xz054/psa_nvidia_stealthily_added_official_fast_sync/

[Sphio]

I have a pascal card so it should be fine, and yes. I have OCd the display to 100hz.