Ed Light wrote:
Athlon 64 is a desktop cpu. Opteron is the server cpu.

Opterons beat Tbreds of the same mhz.

So, we can guess that Athlon 64's will do the same.

Opteron motherboards are kind of expensive.

Athlon 64 motherboards will replace the 32 bit motherboards of today, so
should be affordable after a short period.

I think AMD64 mobos may even end up cheaper as the AMD64s have on-chip
memory controllers so its not something the mobo manufacturer needs to
worry about.