I have the Thermaltake Big Water radiator that uses a 120mm fan. I recently added a video card to the circulation which had the Q6600 processor in the line as well. Since I have very limited space in the case as well as on the outside (notably on the back of the case) I had the idea of simply cutting a hole on the top of the PC case and placing the radiator there. This would mean having it sit horizontal instead of its typical up right position. My question is would this pose any kind of problem for the circulation?