thanks, Leeghoofd !

by the way... since you have more experience. i'm thinking of future investments in q6600 rendernodes since they give the best price/performance ratio... especially when overclocked of course. now. i'd need also cheap cases and i thought about 1u or 2u rack cases.
is it okay to overclock to 3.4 with a better fan (i'm not sure if a zalman would fit in there) in such a small case or do you see significant problems with that ?

what mobo and what ram is best / cheapest / most reliable for such a task ? there are so many possible rigs around - i'm a little lost ...