I'd look for the Venice rather than the Winchester
*edit* those specs are wrong. Winchesters are 0.09 micron (or 90nm) not 0.13
and the Athlon 64's don't have a FSB. the system bus is their equivalent.
basically the FSB is the link between memory and CPU via the memory controller chip. because the Athlon 64's have their memory controller chip onboard, the FSB is inside the CPU itself and not through the motherboard. the link between CPU and memory is called Hypertransport (or HTT)