Yes, pcie 3.0 is fully backwards compatible with previous pcie, and with 2.0 there's no bottleneck or loss of performance(as long it's x16).http://tpucdn.com/reviews/Intel/Ivy_Bridge_PCI-Express_Scaling/images/perfrel_1920.gif
Thanks so much now I can rig it all together
Intel Intel Core I7 3770k - 3.5 Ghz - 4 Cores - 8
Akasa Venom Power 750W PSU, Modular, dynamic single 12V Rail, 80% efficiency, thermally controlled 12cm fan
to go with the board and gtx670
Willl 750W run it okay?
Should I opt for thermal cooling or will the standard fans be ok?