Hard to tell how many cos I would need to know the expected output from say 8356's or whatever is cheap (hope someone can chip in here) but certainly one just to say I gotta 4p ...price ....lets say based on those boards with everyone trying to get things working I'd say around $100 would be a deal...maybe more if you are talking about a more standard type.

We might want to try the same on cpu's and memory...see what we can find if we buy bulk