Hello! a friend of mine gave me a old Asus P5E3 MOBO and I just needed some ground to stand on while choosing the correct CPU to purchase. It has a LGA775 socket and relatively old. I am split down the center between the Intel core 2 duo X6800 (because of this forum) and the Intel Core 2 Quad Q9650... I though more cores and higher clock speed meant the Intel Core 2 Quad should have won. Yet CPU bench says a smidgen otherwise.. It is here... I have a Intel Core 2 Duo E8500 right now and it seems to be under powered and potentially bottle necking my GTX 670.Thanks to all who respond!