"The Alpha PAL-8150 heatsink is built to cool recent single and dual core AMD Athlon64/FX/X2 & AMD Opteron processors, and so it's compatible with all socket 939/940/754 CPUs. It should be noted given the imminent arrival of AMD's Socket AM2 Athlon64 CPU, that this heatsink won't be compatible with the four screw hole arrangement that socket is expected to introduce (see here and here). "