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Is there microstuttering on 7970 crossfire? - Page 2

post #11 of 23

For old timers, it's moot to even discuss it.

 

But for those who bother to make a thread, at least some reality will be useful.

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post #12 of 23
I play BF3 and SWTOR in Eyefinity. No noticeable microstutter. Before my 7970s, I had 570s in SLi. No noticeable microstutter either.
 
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post #13 of 23
Using 7970 crossfire, no stuttering.

Some people that do notice stutter fix it this way:

Use the OSD fps limiter in msi afterburner version 2.2 beta 11. Limit fps to 60 or 120 depending on how fast your LCD refreshes. I've heard from everyone that has used it, that microstutter is gone by doing this. Or you can enable vsync
post #14 of 23
In BF3 at least, there was a difference between enabling vsync vs setting AB limiter to 60.

With vsync only, the 60fps felt slower as in when I make a 180 turn, or just moving in general, my monitor is trying to sync up the frames to exactly 60hz on my monitor, amd it tries too hard. It just feels a tad bit slower, kind of like if you enable motion blur, and it is noticeably slower.

With only limiter, it is faster, but I do get some tearing but it's not as noticeable and won't affect gameplay as much as only vsync on because it doesn't feel slow, it just feels like 60fps.

With both on, it felt smooth and no tearing.

Just my experience, no scientifc research or numbers involved.
post #15 of 23
And lemme give ya another generality when it comes to microstutter ... the HIGHER your multi-GPU 'scaling', the MORE likely the setup is to exhibit microstutter.

Optimal 'scaling' for minimization of microstutter is in the 75-90% range. Once you get up into the realm of 93%+ scaling, what that means is that the driver is set up (on that particular test/game) to make no attempt to 'evenly distribute' the frametimes.

IOW, the driver is eschewing any sort of metering (or 'making one card wait for the other occasionally, for the sake of smoothness') in favor of raw FPS. They do this because it helps to sell cards ... but it doesn't make the gaming experience better.

55FPS with no microstutter will be massively better 'feeling' than 60FPS with microstutter. However, the card makers (AMD in particular is especially guilty of this) believe that the public (as well as the online reviewers) are so consumed with FPS and scaling numbers, and so ignorant of microstutter, that it's in their best interest to setup their drivers to maximize FPS and Scaling, and not worry about the 'cost' on the actual gameplay experience.

The main reason microstutter has not been eliminated is that it's contrary to the gfx card makers interests ... because removing it means a) more expensive and elaborate driver code, and b) lower scaling and FPS numbers.
Edited by brettjv - 2/1/12 at 11:50am
    
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post #16 of 23

Ive never noticed microstutter with any multi gpu setup.

post #17 of 23
Quote:
Originally Posted by Inglewood78 View Post

I play BF3 and SWTOR in Eyefinity. No noticeable microstutter. Before my 7970s, I had 570s in SLi. No noticeable microstutter either.

What are your settings in Catalyst and in game?
post #18 of 23
Quote:
Originally Posted by wint0nic View Post

What are your settings in Catalyst and in game?

In BF3, 5760 x 1200, All settings Ultra, motion blur off, FXAA high, 0x MSAA
in SWTOR, 5760 x 1200 all high settings. I get horrible xfire scaling in SWTOR bc the drivers are borked.
 
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post #19 of 23
MSAA does not work well with AMD cards? Why is it disabled? I think MSAA is what is causing the issues though.
post #20 of 23
Quote:
Originally Posted by brettjv View Post

And lemme give ya another generality when it comes to microstutter ... the HIGHER your multi-GPU 'scaling', the MORE likely the setup is to exhibit microstutter.
Optimal 'scaling' for minimization of microstutter is in the 75-90% range. Once you get up into the realm of 93%+ scaling, what that means is that the driver is set up (on that particular test/game) to make no attempt to 'evenly distribute' the frametimes.
IOW, the driver is eschewing any sort of metering (or 'making one card wait for the other occasionally, for the sake of smoothness') in favor of raw FPS. They do this because it helps to sell cards ... but it doesn't make the gaming experience better.
55FPS with no microstutter will be massively better 'feeling' than 60FPS with microstutter. However, the card makers (AMD in particular is especially guilty of this) believe that the public (as well as the online reviewers) are so consumed with FPS and scaling numbers, and so ignorant of microstutter, that it's in their best interest to setup their drivers to maximize FPS and Scaling, and not worry about the 'cost' on the actual gameplay experience.
The main reason microstutter has not been eliminated is that it's contrary to the gfx card makers interests ... because removing it means a) more expensive and elaborate driver code, and b) lower scaling and FPS numbers.

Isn't micro stutter basically when frames have longer delays between being displayed? If so wouldn't that make better scaling have higher FPS meaning more frames in a short amount of time, also meaning less noticable stutter since the delays are shorter?
     
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