aha, I found a sticky at the CPU forum and it described my Athlon64 2800+ as being a Newcastle (I came to this conclusion since the newcastle is the only type with a PR rating of 2800+. Is my reasoning correct?)
anyway, it describes my Athlon as having an FSB of 800mhz, HT Link, on die DDR400 memory controller.
btw, is there a way of discovering the FSB of my CPU, aside from researching over the internet? Is it displayed in device manager or something?