ASUS M5A99X EVO R2.0 with dual GTX 970s bottleneck?

[propancake]

I am worried that the dual gtx 970s are going to be bottlenecked becuase both of them will run at x8, I will be using a overclocked 8350 btw and I will be overclocking both cards

 

[clutchc]

I don't think there's a single-GPU card today that can saturate the PCI Express bandwidth at x8 lanes. That shouldn't be an issue.
https://www.pugetsystems.com/labs/articles/Impact-of-PCI-E-Speed-on-Gaming-Performance-518/

The IPC of the FX-8350 may be the real bottleneck. I'm not sure it can be OC'ed high enough to keep from bottlenecking dual GTX 970.