New Guidelines For CPU Coolers: No Cheap Models, Continued
Only a few select CPU coolers can be used - they must have a copper contact plate for the surface of the CPU die, or use some other kind of contact plating with adequate heat transfer capability. To put it clearly: if you want to equip your PC with a Thoroughbred Athlon XP, you can get rid of your aluminum cooler. As it is, if the new Athlon XP dies a thermal death when used together with a cheap cooler, you will get no guarantee from AMD.
An approved copper contact for CPU coolers.
A CPU cooler from Taisol.