I got my GEFORCE GTX 660 OC today, My system is a Giga Z68a-D3-F8 MB with a I5-2400 and 8 gi ram, I'm replaceing a GTX 460. The 460 gave me a3Dmark11 score of 3900, with the 660 at hit 6300 and that is without the 3.0 graf . I have a I5-3570 coming tomorrow that will open the 3.0. wil post how it runs tomorrow night. The 660 uses less power that most of the new cards today, only one 6 pin connection.