So when I put my new system together, I slapped on the Gelid. Looks cool, cheap, good reviews, solid choice for a mild overclock. Anyhoozle...when I put it on, plugged it into the pwm fan header, and powered on the system, it would spin, then stop for a few seconds, and the kinda start turning again, but not very fast. Like random stop and starts. Didn't look right. I went to my bios to turn it up to 100% but didn't change anything. Downloaded speedfan to see if I could change it that way, nothing worked. The gelid fan had a 4 pin connector. When I plugged in my stock intel cooler (4 pin) it worked like a champ. So its not the header or any of my settings. I assumed the gelid fan was faulty and sent it back. Anybody else experience anything like that? I'm stuck with the stock cooler for now, and will not be ordering another Tranquillo.