I was wondering if the crosshair v formula-z support pcie 3.0 video cards @ 3.0 speeds and if not then if any AMD base boards that do. Thank you.
Negative. No AMD platforms currently support PCIe 3.0, just Intel 3000 series processors. Intel X79 platforms "support" PCIe 3.0 and it does work, but it's not certified and thus Intel only markets them as PCIe 2.0, leaving the rest up to the motherboard manufacturer.