Athlon 64, 64FX, and Opteron???

[t1rhino]

Can anyone list the major differences between the Athlon 64, Athlon 64FX, and Opteron?

[Geeky1]

Athlon 64- Socket 754, single-channel memory controller, does not require registered memory, single cpu only

Athlon FX- Socket 940, dual-channel memory controller, requires registered memory, single cpu only

Opteron- Socket 940, dual-channel memory controller, requires registered memory, dual cpu support