Possible noob question, Asus shows this motherboard has having x16/ dual 8x / tri 8x/4x/4x. Does the 8x/4x/4x refer only to video cards, because I want to use dual video cards then put a OCZ RevoDrive 3 x2 in the last pci slot, but SLI wont work at x4 speed. Can anyone clarify this? Thank You in Advance.