Sorry for the slight hijack but I'm looking for something similar for a new build. I'll be using a Z77 motherboard and 3570K, maybe looking at a mild overclock as well if I feel brave. My case has a 12cm intake fan and 12cm exhaust fan both inline with the CPU location on the board. I wondered if any of these large, tower heatsinks could comfortably be used without any fans attached directly to them? I was looking at the Prolimatech Megahalems, any good used like that maybe?