Ok, I've reinstalled my OS and cleared the CMOS, but now when I try to boot it tells me my CMOS setting are wrong and it will not load windows. I can get into BIOS with both sticks installed and its shows my total memory at 38XX, so I believe it "sees" the ram, any other thoughts? I have tried each stick of ram by themselves, in each slot and everything works fine. It's just when the two get together, in every combination in the slots possible, that it will not work still.