I Have the same situation every 3 or 4 month. The clamp of the heatsink broke in half. I wrote to Zalman and the send me two clamp already. I don't know what happen. This cooler is great my AMD 5000+ Black Edition is well overclocked to 3.2 GHZ with any problem, and the temp are from 38 C to 44 C. I thinking maybe the hot tempeture fatigue the clamp and broke. If anybody have the same problem or know something about this please let me know the solution. If somebody knows is any problem with that part let me know, and if anybody know a better solution to this let me know too. Thanks in advance.