that is true...
but i dunno...i have put on many athlon heatsinks, and removed many as well.
and i put a shim on my computer because i dont feel like buying a new cpu because i moved my computer and it got bumped, or when i was taking the heatsink off or putting it on, something went wrong.
and they are so cheap...why not?
but it is really up to you...
as for the heat thing, they really dont do anything.
i have a copper one myself, and it didnt do anything either way (plus or minus heat).
just gave me the assurance that i wont crack my core for some dumb reason.
-Live, Learn, then build your own computer!-