An FSB in the 'classical' sense doesn't really exist anymore on the K8-platform(i.e. Athlon 64/Athlon 64 FX/Opteron)...
' ">http://forums.amd.com/index.php?showtopic=11141 for more info, especially part III.
Anyways, if you define the FSB as the connection between the CPU and the rest of the system(regardless of whether a memory-controller is involved or not), you could say the CPUs' Hypertransport-link replaces the FSB(or it IS the FSB if you like).
On the current Athlon 64 and Athlon 64 FX models, this Hypertransport I/O-link runs at 800MHz using a DDR-technology which results in an effective clockspeed of 1.6GHz.
Btw, the '200MHz'-setting refers to your processors base-clock. It's 200MHz for ALL current K8-class processors, so leave it at that value unless your planning to overclock.
The opinions expressed above do not represent those of Advanced Micro Devices or any of their affiliates.
AMD Athlon 64 X2 6000+ 89W :: Asus M2N32SLI Deluxe :: 2x1024MB Muskin XP2-6400 DDR2-800 :: BeQuiet! Darkpower Pro 530W :: 2x WD Raptor 74GB/10k rpm, RAID 0 :: ATI Radeon X1950XTX