so i fried my motherboard, got it fixed and he put a single core procssor in it. this isnt nearly fast enough, so i want to put my processor from my old computer in this one, which is a dual core. i talked to the guy at the computer shop, and he said that using a new motherboard with a used processor isnt good? like they are not compatible or something like that? i didnt think this is true at all and was wondering if it is true or not?