LCD's

[The PIT]

Vsync does this matter or not.

[xortam]

Re: LCD's

Originally posted by The PIT
Vsync does this matter or not.

No.

In fact, my WUXGA LCD monitor takes advantage of this in order to support 1900x1200 through DVI. It utilizes the blanking interval bandwidth to handle the extra data since single link DVI wasn't designed to support this resolution.

[The PIT]

Interesting.


Vsync enabled play less smooth.

Vsync disabled smoother play but artifacts.


But your reply is what I would have said.

[Wombat]

Re: Re: LCD's

Originally posted by xortam
No.

In fact, my WUXGA LCD monitor takes advantage of this in order to support 1900x1200 through DVI. It utilizes the blanking interval bandwidth to handle the extra data since single link DVI wasn't designed to support this resolution.

Yes, it matters. Your monitor is taking advantage of the flyback time.

V-sync is not related to that.

A video card has a memory page that will be the data it sends, analog or digital, to the monitor. It sends it at the refresh rate of the monitor.

V-sync says "only update the video memory page in sync with the sending of that page to the monitor." So even with an LCD, if it's only 1/2 way through sending a screen of data, and you update the memory, then you're changing the image that is being sent.

[The PIT]

Sounds like I getting tempted to crt again.

[The PIT]

So you should be best setting vsych on then.

[xortam]

Originally posted by The PIT
So you should be best setting vsych on then.

Yes, which is normally 60Hz for LCD.

[The PIT]

So if I get a card that can refresh the screen at 600 fps what is best.

In either case LCD or CRT shouldn't make a differance as the update should be too quick for the eye too see???

Now with this lcd if I move the mouse up and down I don't see any distotion or rippling. From side too side I do. I thought the lcd did it all in one go.

[Jon P. Inghram]

With v-sync on the rendered frame rate won't exceed the displays refresh rate which might make a difference in games that syncronize their physics engines and whatnot to the frame rate, and in high speed reflex-twitch games like Counter-Strike where higher frame rates are preferable when you spin around rapidly to head-shot the person who just shot at you from behind. And if your frame rate drops below 60 Hz it'll get pretty nasty looking if you have v-sync on without triple-buffering to help smooth things out a bit.

I don't think Windows uses v-sync for it's GUI, although I believe GDI itself does support it if applications are written to use it. Thus if you drag windows left and right you'll get shearing on an LCD or CRT if it's regular Windows OS stuff.

[Terrafin]

Then you have to think about getting a nice lcd with a quick response time too...

[rylan]

The LCD monitors 'scan' in a sense, in that they update line by line at the vsync rate of 60Hz. So if your graphics card can push more than 60fps and you have flip on vsync disabled, then you might be changing the image before the panel completed drawing, hence the tearing artifact that everyone knows about. Turn vsync on and you should be locked at 60fps, unless the card gets squeezed then you'll drop to 30fps. CRTs you can drive the vsync faster, say at 100Hz so you can set vsync on and assuming your card can match it you'll get the higher 100fps.. if it can't it'll drop down to 50fps and update the data every other frame.