Vsync, what is it?

[pcfan]

What is Vsync and should it be used?

 

[easyrider]

Now, what is VSYNC? Well, VSYNC is basically the synchronizing of buffer swaps with your monitor's refresh rate. With VSYNC enabled, frame rates will not exceed the monitor's current refresh rate for that particular resolution. For example, if your monitor is using a refresh rate of 85Hz at 800x600, with VSYNC enabled, you will theoretically never exceed 85fps. So the refresh rate creates an artificial barrier that limits the frame rate.

Bottom line - you can benchmark with Vsync disabled to test the peak performance of the video card. However, to get the most immersive gaming experience, leave Vsync enabled.

 

[pcfan]

I vsync enabled by default?

 

[paradigm]

Not usually, will most likely be set to "application controlled", meaning your game will be controlling if its on or off. Most games are set to on by default.

 

[pcfan]

So i really shouldn't have to bother with it then?

 

[paradigm]

Not unless you're experiencing problems, no.

Personally I run vsync off, but i'm strange like that. There are certain jumps you cannot do in COD:UO unless your rendering >125fps.

 

[4T5]

However, to get the most immersive gaming experience, leave Vsync enabled.

Hi dude would you mind explaining while you feel this way.
Personally i have always switched Vsync off to maximise my frame rates ingame.
My system does not suffer from any tearing whatsoever as i am fortunate enouth to have a system that copes with all my current games admirably.
If i am missing out though i want to know so please explain.

Thanks.

 

[pcfan]

When you say 'Tearing' what do you mean by that? What effect does it have on the screen?

 

[4T5]

Tearing = Graphical anomoly usually lines across the monitor.

 

[paradigm]

Its caused by the video card trying to re-render a frame during a time that the monitor is refreshing, so half way through the re-draw, the monitor will also do a re-draw, resulting in a "tear" where the two frames dont quite match. The re-draws are insanely fast, and will only be a problem for a nano-second, but it is there, and for some people that is enough to leave VSYNC on.

 

[squiffy]

I had tearing in Fear but didn't really notice it, but in Doom III straight away. Enable Vsync and the tearing disappears. Didn't have this problem with CRT's, probably because CRT refresh is usually much higher than the FPS (older slower machine)