I was thinking about buying soon 2 gtx 560 and run them in sli. I have a P5E3 Deluxe and my OS is Windows 7 64-bit. According http://www.nvidia.com/object/io_1234353747819.html so you can run sli today with a core 2 quad cpu on my motherboard (chipset x38). At the bottom it says that there may be some changes in the future. The question is what nvidia commented is the case now and if I can run 2 gtx 560 in sli?