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[Tweaktown] 8x PCIe Limits Highend GPUs - Page 2

post #11 of 32
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Quote:
Originally Posted by pauldovi View Post
Anyways this article IS comparing 8x PCI Express 2.0 (equivalent to 16x PCI Express 1.1) to 16x PCI Express 2.0.
If that's true.... then x16 PCIe 1.x slots on most motherboards are bottlenecking?
Once again...
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Once again...
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post #12 of 32
For SLI/Crossfire, probably. Heck, 16x PCI-E 2.0 is probably a bottleneck for such uses, it's just that there is no card that uses anything faster ATM. I suppose oen could OC the PCI-E bus and see if there is a difference to confirm or deny this.

Anyway, I don't the issue would be nearly as large with single GPU configs, and I would be surprised if 8x PCI-E 1.x was a noticable bottleneck for any single card.
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post #13 of 32
How much of a bottleneck is it? This is epic.
post #14 of 32
Quote:
Originally Posted by pauldovi View Post
I saw a recent review concerning the matter, it seemed there was a slight benefit of 16X PCI Express 2.0 over 16X PCI Express 1.1.

*Looking*

Anyways this article IS comparing 8x PCI Express 2.0 (equivalent to 16x PCI Express 1.1) to 16x PCI Express 2.0.
Is this it? http://www.tomshardware.com/reviews/...0,1915-13.html
PCI-E 8x 2.0 vs. PCI-E 16x 2.0
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post #15 of 32
but crossfire x8 x8 is still faster than one card x16 right?
    
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post #16 of 32
Quote:
Originally Posted by x7337H View Post
but crossfire x8 x8 is still faster than one card x16 right?
Yes, of course
post #17 of 32
Thanks, Duckie.

Post this on as many message boards as you can and spread the word. It would be unfortunate if any more people end up with the wrong motherboard because they're (understandably) excited about the new ATI cards.

On another note, overclocking the PCI-E bus might, depending on how your card is designed, automatically increase your GPU clock, and there's no way to really know how it's being clocked, as far I know. I tried this with an 8800 GTS and I couldn't overclock as high as when it was at 100MHz. I remember reading a Fudzilla article comparing performance with overclocked PCI-E. Maybe I can still find it...
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post #18 of 32
Total BS. Show us a program that displays the PCIe bus being bottlenecked on the motherboard when running "highend" cards.
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post #19 of 32
Quote:
Originally Posted by OpTicaL View Post
Total BS. Show us a program that displays the PCIe bus being bottlenecked on the motherboard when running "highend" cards.
What? Did you not read the article? The benchmarks do not lie...
Edited by Somenoob - 6/19/08 at 3:47pm
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post #20 of 32
Quote:
Originally Posted by DuckieHo View Post
If that's true.... then x16 PCIe 1.x slots on most motherboards are bottlenecking?
Depends. I don't think so in a single card solution because you don't have to worry about the communication between cards. However in CrossFire I would say yes, according to the results of this review.
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