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Old 09-12-13, 11:32 AM   #60
slaWter's Avatar
Join Date: Aug 2005
Location: Switzerland
Posts: 823
Default Re: Post Your Rig 2013 Edition

Originally Posted by newparad1gm View Post
I think there was a case that at Surround resolutions, there was a sizable difference between 8x8 PCI-E lanes vs 16x16 for dual GPU systems, but that might have been at the 2.0 spec.
That could be some cases. However:
During my Tri-SLI testing the cards usually ran at x8 PCIe 2.x spec. Even extremely demanding tests showed no difference between x16/x8/x8 or x8/x8/x8 or x16/x16 (when using only two cards). There might be a few frames on the line but nothing major.

x8/x8 PCIe 3.0 like on Haswell for example is easily enough for a two card solution.

AFAIK, only Sandy Bridge E was "blocked" by nVidia for PCIe 3.0 because that CPU went through testing/certification before the PCIe specification was finalized.
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