i7 number cruncher

[physichull]

Hi, I need a system that has to be good at number crunching, not needed for games or graphics but needed for running complex maths codes. I was looking at the i7 920 and overclocking it. But how much RAM would be optimal for that processor? Is there a point where buying more RAM makes no difference?

 

[physichull]

Physics codes mostly for nuclear physics calculations. Won't be overlocking to the extreme, just a fair amount and get a decent cooler.