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Crossfire x16,x4 vs x8,x8 Comparison - Page 3

post #21 of 25
I found a noticeable diff going from x16/x8 to x16/x16 myself
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post #22 of 25
I feel like this was bumped from last year, that the post should distinguish PCI 2.0 from 3.0....
 
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post #23 of 25
wasn't bumped, but it did go from 3/25/11 to 3/26/12. One year and a day, weird
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post #24 of 25
Quote:
Originally Posted by Behemoth777 View Post

Hey guys, I thought it would be fun to compare these two types of crossfire, since I always hear people asking whether crossfire works okay on boards that only support x16, x4. Well, I'm here to set the record straight.


Crossfire on the UD3P:

crossfireud3p.jpg

Crossfire on the EVO:

crossfireevo.jpg

As you can see, the fps increased substantially, and not only that, the benchmark feels much smoother on the EVO. With the UD3P, microstutter was noticeable, but on the EVO, microstutter is non existant.

Conclusion: If your looking to go crossfire, or even thinking about doing it in the future, make sure you go with a board that supports x8,x8 crossfire. It is a much better experience and also frees up your other pci-e slots for sound cards, raid cards, ssd's, etc.
Very old thread, i know, but a spot on topic smile.gif

Strange that nobody has mentioned that the difference in scores and FPS are all within' a margin of error. And has nothing to do with x16 / x4. or x8 / x8. IMO.
Quote:
Originally Posted by JTHMfreak View Post

I found a noticeable diff going from x16/x8 to x16/x16 myself
biggrin.gif I find that very hard to believe.

I just replaced my Asus Z68 V-LX motherboard for a MSI Z77A, just to get the x8 / x8 feature.
I have not yet seen any big differences in benchmarks like 3dmark, heaven or valley. Haven't been playing so much on the MSI board yet, so can't say much on that.

But i didn't notice any "stuttering" or things like that with the Asus motherboard, that runs @ x16 / x4.(PCIe 2.0, since i only have the Sandy Bridge i5)

i5 @4.6GHz.
Sapphire Vapor-X 7950 @1.1GHz Crossfire. (One screen, 1080p)

Maybe the issue will be more noticable if you run several screens and at very high res?
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post #25 of 25
Quote:
Originally Posted by Falcy View Post

Very old thread, i know, but a spot on topic smile.gif

Strange that nobody has mentioned that the difference in scores and FPS are all within' a margin of error. And has nothing to do with x16 / x4. or x8 / x8. IMO.
biggrin.gif I find that very hard to believe.

I just replaced my Asus Z68 V-LX motherboard for a MSI Z77A, just to get the x8 / x8 feature.
I have not yet seen any big differences in benchmarks like 3dmark, heaven or valley. Haven't been playing so much on the MSI board yet, so can't say much on that.

But i didn't notice any "stuttering" or things like that with the Asus motherboard, that runs @ x16 / x4.(PCIe 2.0, since i only have the Sandy Bridge i5)

i5 @4.6GHz.
Sapphire Vapor-X 7950 @1.1GHz Crossfire. (One screen, 1080p)

Maybe the issue will be more noticable if you run several screens and at very high res?

I was running SLI with older cards, when I switched slots I got much better performance, things are different now I am sure.
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