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Will PCI-E 3.0 even be fully utilized?

post #1 of 11
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I was looking up some articles on google news and people seem to be raving about PCI-E 3.0 on the next gen x79. Obviously, AMD Southern Islands and Nvidia's Kepler are stated to be the first of cards to utilize this, but will it even "need" it? Can't PCI-E 2.0 and 2.1 get the job done?
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post #2 of 11
not with current GPUs and CPUs...but some day. Though I am sure some tri and quad GPU systems will benefit from it.

Without progress though...we will never get anything new
Edited by Vagrant Storm - 7/18/11 at 3:21pm
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post #3 of 11
Yes, but it is the same reason why some spinning hard drives are using a "sata III interface". And where did you see an article saying that southern islands and kepler were going to be pci-e 3.0?
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post #4 of 11
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post #5 of 11
Firstly, PCI-E can be used for things other than video cards.

Secondly, more performance per lane means less lanes needed to achive the same effect. The first few generations of PCI-E 3.0 GPUs will likely run excelently in multi-card configs, even if only 4 or 8 lanes are available per card.
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post #6 of 11
I believe most (nearly all) cards we have now would still be fine on even PCI Express 1.x (or PCI Express 2.0 8x), let alone 2.0 (2.1 is the same speed as 2.0) or 3.0, no?
post #7 of 11
Thread Starter 
Quote:
Firstly, PCI-E can be used for things other than video cards.
I know that, my main concern is with video cards though
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post #8 of 11
Quote:
Originally Posted by Blameless View Post
Firstly, PCI-E can be used for things other than video cards.

Secondly, more performance per lane means less lanes needed to achive the same effect. The first few generations of PCI-E 3.0 GPUs will likely run excelently in multi-card configs, even if only 4 or 8 lanes are available per card.
I forgot about this. IIRC, pci-e 3.0 not only increases bandwidth but also cuts latency, so you will probably see an increase in performance even from a pci-e 2.1 card over a regular pci-e 2.0 slot.

And those articles are still rumors. We'll see how it pans out.
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post #9 of 11
Thread Starter 
Quote:
I forgot about this. IIRC, pci-e 3.0 not only increases bandwidth but also cuts latency, so you will probably see an increase in performance even from a pci-e 2.1 card over a regular pci-e 2.0 slot.
Ok.... Would it be like having a SATA III SSD on a SATA II mobo and having reduced performance? Or will next gen gpu's run fine on 2.0/2.1?
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post #10 of 11
you wont see any increase in performance. if it was really that big of a deal, the tier 1 motherboard companies would have had that tech out way before asrock and MSI. As far as I know all it offers is better for PCI-E 3.0 RAId cards and other PCI-E devices that use PCI-E 3.0, but not for GPUs. I doubt youd see any gain from a GPU.
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