Hy guys. Please, I need help with this, I'm building desktop; Intel Proccs socket 775 Q9650, MBoard Intel DP45SG. I bought RAM DDR3 corsair XMS3 1333, but It didn't work, I just think This MB doesn't support this memory. I had to return this MB, but I can't return the RAM. I would like to know what MB S 775 has compatibility with this RAM. Thanks for your help....