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6950/6970 Eyefinity Vsync, what gives?

S

Sottilde

Limp Gawd
Joined
Apr 19, 2005
Messages
177
I have been trying for a long time to get vsync going on my 6970 Eyefinity setup to no avail. What happened with this? I've heard mumbling of AMD dropping the ball on this but is there any way to force it on with Eyefinity?
 
Eyefinity and Vsync doesn't work and never has.

In some games -Dirt2 for instance- it 'seems' like it's working because your framerate is capped at 60 when vsync is enabled but it's clearly not working and there is horrible tearing going on still.
 
samuelmorris said:
Can I just ask, why do you need VSync?
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There is a lot of subjectivity involved but I feel that consistency in framerates is more important than high framerates, in tricking your brain into thinking it's looking at smooth movement. Also, the horizontal visual tearing without vsync looks ugly, which is the opposite of what you want from an expensive video card.
 
I guess it's sort of a trial and error check. I use Vsync on all my games because my monitor's refresh rate is 60 Hz, and what's the point of rendering 150 frames? Doesn't that overwork your video card? I guess eyefinity is different, because you're not going to easily achieve 60 FPS on every game. I just can't stand tearing either. >.>
 
Mystique said:
Doesn't that overwork your video card?
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No it burns electricity the same.... you cant really overwork a computer component. They dont get fatigued and they are not a horse. I run my 6970s HARD and my I7 even HARDER because I am [H].
 
Perhaps I didn't explain myself correctly. People have reported lower temperatures while running with Vsync on. Thus, I came to the conclusion that rending less frames might strain the video card less. I know they can 'work' to the limit. I put my stuff on furmark and prime95 too. I know they're made to run at full capacity, but what's the point of running a 10 year old game without vsync and getting 700 FPS and about 20 degrees higher temp than 60 FPS and no tearing?
 
You're right, and the guy above you is wrong, to a degree. There is no exact correlation between FPS and GPU stress. For one thing, your FPS goes down when you apply higher settings, which stress your cards more, so you can't say that higher FPS equals more stress. But yes, in older games, if you are running at 150-200+ FPS, it radically stresses at least some GPUs.

As for Vsync and Eyefinity, the information is mixed. The other day I tried forcing Vsync in Dead Space in CCC while leaving it off in-game, and it didn't take. That was on a single monitor with CF. So who knows where the issue lies - drivers, game, Crossfire, Eyefinity...

On the other hand, I don't understand why anyone uses V-sync, at least in landscape mode. Are you really seeing significant tearing without it? In some of your games or all of them? On which monitors?

Even if you could enable V-sync, all you accomplish are increased input lag and decreased frame rate consistency (multiples of 15). And you can't apply triple buffering override to alleviate these issues since that doesn't work in either CF or SLI regular modes.
 
I guess I will need to run some tests. It's been a solid long time since I've bothered playing any game with VSYNC off.
 
samuelmorris said:
consistency in frame rates is much better with VSync switched off.
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A framerate that sits at 60 the entire time you play is much more enjoyable than one that swings wildly between 70 and 200 as you move your head around, along with horrible screen tearing. But as I said, it's subjective. I can't stand having vsync off. I don't see how people can pay all that money for expensive graphics cards and watch that kind of poor image quality.
 
To my eyes, vsync looks worse. It seemed really choppy in BC2 and CSS. I don't really know how to explain it, it may have just been my eyes playing tricks on me but I know one thing is for sure I enjoy those games a lot more with vsync off.
 
I ask because the tearing I get in some games, especially Oblivion, is completely out of control and distracting. I don't need to pull 120 frames and waste electricity on frames my monitor can't display, and the tearing kills me.

Has no one figured out a way to hack this in?
 
I've never had any issues with Vsync while testing 1 to 4 6970s in Eyefinity. It got rid of all screen tearing as prescribed.
 
Vega said:
I've never had any issues with Vsync while testing 1 to 4 6970s in Eyefinity. It got rid of all screen tearing as prescribed.
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Same here. I haven't had any problems enabling vsync with eyefinity. Bfbc2 with vsync reduces the tearing and makes the game feel smother for me. I haven't experience any input lag with my card yet.
 
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