oh. thank you. but i dont know how socket A amd's work. only 939's. sorry. so can u plz expand on this? thank you.ownage said:FSB is the speed the cpu and northbridge communicate. clock speed is internal speed, inside the cpu. Internal speeds have very little latency so the speed is very high. A multiplier multiplies the FSB, as you have noted. Intel is the same as the socket A AMDs.