Originally Posted by garretts43
I have two 980's in SLI. I went into my BIOS and saw both cards are running at x8. My MOBO is an ASUS x99 Deluxe with a 5820k CPU.
I was just wondering that maybe SLI is the reason both are in x8?
Well, the 5820K only has 28 PCIe lanes compared to the 40 lanes of the 5930K and the 5960X, so at most you could get 16x on the first and 8x on the second.
The 980 shouldn't be too bottlenecked in games (if at all) in PCIe 3.0 x8, so it's not much of a problem.
Still, you should be able to change it in the BIOS and set the first card to operate at 16x.