malccy said:Always found that if the res can feed the pump easy enough it does not matter where it is although it is preferable to have it high.
Running two watercooled pc's and both have the res on the floor of the case with the rads in the roof of case and never had any problems.
not saying it's a problem, one of mine is a tank underneath the comp, just it's easier to get rid of bubbles with the comp off and the res high, not that you HAVE to have it there, just that it's easier, it wasn't a definitive statement but a suggestion