I got my FOP38 in the mail today from millisec, and that thing was an absolue B*TCH to get on! It took me about an hour to get it on my Duron 600, and my fingers were all bleeding after I removed my power supply and managed to get it on. But other than that, it seems to be a great heatsink, the deltas being "loud" isnt really true. There not that loud at all compared to 120mm Sunons...