Answer: Any heatsink that is compatible with AMD socket AM2 or AM3 is compatible
with socket FM1. Some socket 754/939/940 heatsinks will also be compatible,
but not all... those heatsinks that use two-screw holes will NOT work with
the four-screw hole socket AM2 mounting system. However, those socket
754/939/940 heatsinks which CLIP onto the heatsink retention cage will be.
FULL STORY @ FROSTYTECH (http://www.frostytech.com)