Ohh...yeah, I forget that, my 955 is AM3
. But maybe for a future upgrade.
My AM3 chips (710 & 965) have both used AM2 designated HSFs, on an AM2+/AM3 motherboard (DDR2, AM3 exclusive motherboards are DDR3). As far as I knew, when it comes to HSF, AM2 covers the formfactor up to AM3, including am2+.