Thank you for your reply. Is 30 mm difference in size between the cooler and the case enough? Because the motherboard isn't directly on the bottom (and the socket/cpu isn't flat of course). Also this cooler is good for overclocking, right? I want to get the cpu (Intel Core i5 2500k) to run at 4 (or 4.5 if possible) ghz. There aren't much reviews about it, but the ones I found were positive about it. Sorry for asking so many questions, I just want to be sure before I order it (this pc is my first custom build pc).