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Whats Vsync? Important!! (Vertical Sync)

H

HamidFULL

Member
if you know whats Vsync tell me ,its Vertical Sync?
how it effect on game quality you know some pics for difference between Vsync On and Vsync Off Help me tanx
 
Vertical synchronization (v-sync) refers generally to the synchronisation of an event with the vertical blanking interval. Generally video displays are refreshed sequentially and on older CRT based displays, a short delay is required between updating the lowest horizontal line of the display and returning to refresh the highest. This delay, which is preserved by more modern display equipment, gives an opportunity in computer graphics to alter the contents of a framebuffer without visible graphical errors such as partially redrawn graphics or page tearing (when the top part of the display shows part of one frame and the bottom part shows of another).

And no, we can't give screenshots because it has to do with the way things are presented in motion on your monitor, nearly impossbile to capture. Why don't you try a few games with vsync on and off, you definitly have a capable system.
 
Turning off vsync can cause tearing in some situations.

If you're going to use vsync be sure to use triple buffering as well.
 
I HAVE to use vsync with my 2005fpw or I get horrible tearing. It limits my FPS to the nearest 20, 30 or 60, but it helps tremendously. If no one's posted pics or video by this afternoon I will try and show you.
 
Well, I have just proven myself an idiot by trying to record an example of tearing by using fraps. I didn't realize it until I had recorded a short vid with vsync both on and off and couldn't determine which was which. Looks like I will be providing no example today...
 
I've always ran without Vsync in order to achieve max performance, I just run with 100hz refresh rate on my CRT to prevent screen tearing.

That was one of many reasons I returned my LCD ..It looked terrible with vsync disabled.
 
What does triple buffering do to help Vsync?
Click to expand...
It basically allows rendering to a third framebuffer which prevents the rendering stalls you get with vsync + double buffering.

does triple buffering do anything if enabled alone?
Click to expand...
No, other than waste VRAM.
 
Originally posted by: Thorny
Well, I have just proven myself an idiot by trying to record an example of tearing by using fraps. I didn't realize it until I had recorded a short vid with vsync both on and off and couldn't determine which was which. Looks like I will be providing no example today...
Click to expand...

Heh, that is becuase Fraps or anything else like that records images from the framebuffer, where as tearing is something that happens at the display.

If you want to make a screenshot of what it would look like on the display without vsync; just take two screenshots real quick while moving and then paste an upper half or so of the first screenshot on top of the second screenshot.
 
Go and download Prey demo.

Turn vsync off, play, then turn it on, play again.

Could you tell the difference?
 
Originally posted by: wizboy11
Go and download Prey demo.

Turn vsync off, play, then turn it on, play again.

Could you tell the difference?
Click to expand...

You have to do a vid_restart in the console when toggling vsync on / off from the game menu (or you could just exit the game / reload it).
 
Originally posted by: JRW
Originally posted by: wizboy11
Go and download Prey demo.

Turn vsync off, play, then turn it on, play again.

Could you tell the difference?
Click to expand...

You have to do a vid_restart in the console when toggling vsync on / off from the game menu (or you could just exit the game / reload it).
Click to expand...

Alright???? (never knew about that)
But Prey tears a lot, A LOT. It's a great game to show what vsync does.
 
dell 2007fpw 1680 x 1050 - 60hz refresh rate... i dont do gaming... should i have vsync on or off??
 
Running Prey on my Dell 2405 WS I had to turn V-sync on to get rid of severe tearing. Seems to run fine with it on.

How do I ensure "triple-buffering" is turned on?

Thanx.
 
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