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PCIe 2.0 x8 X x8 vs . PCIe 1.1 x16 X x16

  • Radeon
  • Graphics
Last response: in Graphics Cards
April 14, 2009 10:35:15 PM

I was wondering whether pcie 2.0 x8/x8 is any slower than pcie 1.1 x16/x16. pcie 2.0 is supposed to have double the bandwidth of pcie1.1. How would this effect the performance of 2 HD 4850s in CF?

Asrock a780gxe/128m mobo
4 gb gskill ram
AMD Phenom II 920 @3.29 ghz (air)
4850 (512 mb, soon to be crossfired)

More about : pcie pcie x16 x16

April 14, 2009 11:47:52 PM

with all the cards out right now, the difference in performance between PCIe 2.0 and 1.1 is negligible. And also, the difference between running CF/SLI at x8/x8 and x16/x16 is also very minute, and doesn't make a noticeable difference.
April 15, 2009 12:00:48 AM

Basically you'd be getting the same bandwidth. There may be small (and I mean very small) differences due to latencies, but not a whole lot.