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VSync

On eliminates tearing artifacts resulting from your FPS being higher than your refresh rate. With VSync on, your FPS is capped at the refresh rate of your screen.

Off gives higher absolute framerates, but can result in annoying flickering and visual artifacts if your FPS is above your refresh rate. Some people don't care. It drives me nuts, so I always keep it on except for benchmarking.

You could also search and read the dozens of threads already existing on this topic. It's been debated to death several times.
 
I always keep it on. But like everyone else says if you see no problems with it off, then it doesn't matter. I think it does slow down performance but if your fps are higher than your refresh rate, then I don't think you have to worry about a performance hit.
 
I've noticed that my games feel a little sluggish with VSync on. Then again, my monitor only has a refresh rate up to 85 hertz. I usually leave it off and have never noticed "tearing." To each his own.
 
Always off. A little tearing is a small price to pay to avoid the lag, FPS and resource problems of vsync, triple buffering and combinations thereof.
 
I tried out vsync, and this is what I found:

DOOM 3
1024x768 noAA noAF
High Quality
Timedemo Demo1
refresh rate 85 hertz

with vsync (no tearing)
56 FPS

with out vsync (has tearing every now and then, but still very playable)
105 FPS

I'm going to keep it off

 
Doom is open gl try another game with direct 3d, ive only seen tearing on a webpage with pics of it from the sites example pics lol.

As you know 3d mark test turn of sync to get high framerates not limited by monitors HZ and you shouldnt get tearing in benches, i hit 450fps in old 3dmark 2001 on that dragon part with chick on its back in low level test.

Newer nvidia drivers dont let uo turn of direct 3d sync using coolbits only default open gl is avail (u will see its only open gl if u hover over and use "whats this" menu.

I have since used riva tuner to kill both open gl and direct 3d syncs and now newer nvidia drivers again are missing the override refesh rates tab, so i have to use nvtweak "aka coolbits 2" lol.
 
Originally posted by: Matthias99
On eliminates tearing artifacts resulting from your FPS being higher than your refresh rate.
Click to expand...

It also elimates the tearing artifacts resulting from you FPS being lower than your refresh rate, and the tearing artifacts from from your fps being equal to your refresh rate but out of sync with it. Tearing always happens when there is no vsync. Granted, if you don't notice or do not mind the tearing, you might as well leave vsync off.
 
With Vsync enabled, the graphics card waits for the monitor to refresh before starting a new frame. The key word there is 'wait'. If the graphics card waits, it's not doing anything, meaning you get less average frames per second. With Vysnc disabled, the graphics card draws as fast as possible. So, really, you are using your card optimally.

If this is all it did, many more people would choose Vsync off because it would give you performance benefits, but there are visual sideeffects that affect the choice, on or off, other than framerate differences.

With Vsync enabled, you may or may not experience slower mouse response time - if you do, it may be negligible anyway, so not too much of a problem. You also may notice jumps in frame rates. Say your refresh rate is 85Hz; you may notice jumps from 85fps down to 42fps. I see this jump and it looks like slowdown and distracts me and can get me killed. With Vsync disabled, you may notice tearing, which is part of the screen shows part of one frame and the other shows part of another frame. I don't notice this enough to bother me because I'm used to it.

Overall I like vsync off because my fps is more stable allowing a smoother gaming experience and tearing is minimal*, however Vsync on is more pleasing to my eyes. I do recommend Vsync on if you have a CRT that is able to display 120Hz at your chosen resolution. This, in my opinion, is the best option for vsync.

*Tearing is minimal once you are used to it, but going from Vsync on to Vsync off will allow you to see a lot of tearing that might frighten you away from Vsync off.
 
Originally posted by: christopherzombie
I tried out vsync, and this is what I found:

DOOM 3
1024x768 noAA noAF
High Quality
Timedemo Demo1
refresh rate 85 hertz

with vsync (no tearing)
56 FPS

with out vsync (has tearing every now and then, but still very playable)
105 FPS

I'm going to keep it off
Click to expand...



If Nvidia offered triple buffering in Doom3 you wouldn't see nearly that much loss in framerate with vsyc on. Fruthermore, with a high enough refresh rate and triple buffering you would not see any peformance loss at all. Heck, even just a higher refresh rate would do wonders, it looks like you had your refresh rate at 60hz in that bench.
 
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