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[dvHW] No micro stuttering on the Radeon HD 4870 X2? - Page 2

post #11 of 23
Quote:
Originally Posted by darkcloud89 View Post
I don't really think they would necessarily need to make any hardware changes. As far as I know, the issue is specifically with the AFR method and not present with other multiGPU rendering methods such as SuperTiling. I think a driver fix isn't out of the question, all they would really have to do is delay the rendering of every other frame. Although I don't think this is an option they will likely take since it will appear to lower the benefit gained from using a multiGPU configuration, especially when you consider that not everyone notices it.
When you have crossfire, are you able to select the method used to split the frames between the GPUs? So you could force it to use SuperTiling?
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post #12 of 23
Quote:
Originally Posted by 003 View Post
When you have crossfire, are you able to select the method used to split the frames between the GPUs? So you could force it to use SuperTiling?
i'm sure you can, but when your on auto, ati's drivers will find the best way to scale on your game, ATI cheats and optmizes each game differently.

ehh but micro studdering? mabye once in a blue moon it turns into 1 second studdering.
post #13 of 23
Quote:
Originally Posted by 003 View Post
When you have crossfire, are you able to select the method used to split the frames between the GPUs? So you could force it to use SuperTiling?
I don't think that either SuperTiling or SFR modes are supported in the most recent Catalyst drivers or in any of the drivers since HD3k. That being said, I only have a single 3850 at the moment so I can't enable CrossFire to check.
post #14 of 23
Quote:
Originally Posted by IcedEarth View Post
I thought Micro stuttering was voted null and void as it was happening too quick for someone to even detect it? Or am I making up stories again
I've never witnessed it with my setup....not to say that it doesn't happen though.
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post #15 of 23
I think they're talking about 2 gpus on 1 pcb which applies to 3870x2 and 4870x2.
The little stuttering is noticeable to me.
Hope 4870x2 really got rid of this issue.
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post #16 of 23
Hmm... I've never heard of micro stuttering. I notice some strangeness on crysis even when the framerate is decent in some areas, but I'm pretty sure that's the games fault. I'm not usually the kind of person who notices little picky things, but then again I can tell the difference between 35 and 50 FPS.
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post #17 of 23
Quote:
Originally Posted by MomijiTMO View Post
I find it hard to believe that they have fixed this hardware issue. I think ATI might have minimised it but micro stuttering would be pretty hard to completely fix.
not really, but it would require an external memory controller.

really what they're doing isn't ahrd to predict. the ring bus architecture is in itself inefficient and a stupid idea if implemented in the way it was on R600, RV670, and RV700. But it allows for you to add a central memory controller which can coordinate the actions of two GPUs. R600 was a future looking design and the future is R700 where you will have multiple dice and each will just be another stop on the ring bus.

the issue with micro stuttering is that the die to die communication was in essence over the system bus and was coordinated via software execution, NOT hardware execution.

as it is I predict nVidia basically being screwed come the next generation of cards simply because GT200 GX2 will be more expensive to make than R700 and probably would offer similar performance.

Quote:
Originally Posted by markatto View Post
Hmm... I've never heard of micro stuttering. I notice some strangeness on crysis even when the framerate is decent in some areas, but I'm pretty sure that's the games fault. I'm not usually the kind of person who notices little picky things, but then again I can tell the difference between 35 and 50 FPS.
not it's the cards fault. the cards aren't able to rendering the frames in proper synchonization. happens in all games. I've heard tales of people disabling crossfire and SLI because the games stuttered more even though the frame rate is higher.

it's getting better with each driver release though
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post #18 of 23
Quote:
Originally Posted by MomijiTMO View Post
I find it hard to believe that they have fixed this hardware issue. I think ATI might have minimised it but micro stuttering would be pretty hard to completely fix.
Theoretically even single cards have micro stuttering however its so small we call it non-existent.
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post #19 of 23
Quote:
Originally Posted by Licht View Post
Theoretically even single cards have micro stuttering however its so small we call it non-existent.
I've got it on my laptop and it annoys the hell out of me.

Well this will be good.
post #20 of 23
Quote:
Since the GDDR5 is clocked at 1800, the total bandwidth will be roughly 160 GB/s at 1 Gigabyte through the 256bit-bus
Someone needs a new calculator.
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