Quote Originally Posted by SKYMTL View Post
You make a good point. It actually may not be the slot being the bottleneck but rather the PLX chip.
I dont think its the PLX chip, the plx chip basically makes the 16x pcie slot into two 8x slots.

So that means performance similar as 5850 crossfire on say a 780X/780GX/P55. But if one uses PLX on a 8x PCIe the 8x speed will go down to 4x.

5850 CF with 780X/780GX gives similar performance as 5850 CF + 780FX so i dont think PLX is a issue.