Ok i am helping my friend Jake build a computer for gaming and AutoCad 2006 i suggested get dual core cus first of all hes using Auto Cad and he does a lot of things at once, the 4400 costs $500 and the 170 costs $430, is the opteron better, i know you can overclock them more but it only has half the FSB so im not sure can you help me help him. Or would it be better to go with the 175???