i am going to make a build with the amd fx8350 however when i was looking for motherboards for it they all only have PCI Express 2.0 x16 ports. i want to put a GTX 970 in it however it says that that uses a PCI Express 3.0 x16 port. this confuses me as on pc part picker it says they are compatible. would i be able to use the 970 in a PCI 2.0 slot?