error correction.
i think ALL (if not, then most of them) amd chipsets that are currently in production do NOT work with ECC memory. If you use ECC memory they either simply dont work, or the motherboard disables ECC of the memory and uses it as regular non-ECC memory.
I dont know if Intel systems currently can use ECC. I think ECC was made for server useage.
also note: I remember reading somewhere that the ECC function is now performed by the software you use, instead of the memory itself. I dont recall where I read it, so it might not be correct, someone pipe up if that is correct/wrong.