Sorta because the frequency at which a CPU operates is determined by applying a clock multiplier to the front-side bus (FSB) speed in some cases. But IIRC AMD processors use a Hyper Transport Bus which largely serves the same purpose.
If you install a CPU with a higher frequency than the FSB/chipset, won't it just downthrottle the CPU?
The CPU operates on a frequency multiplier to match its rated frequency to some multiple of the memory bus speed, which is actually 1/4 that of the DDR bus speed. (DDR3-800 is actually on a 200MHz bus. A 3.2GHz processor is on a 16x clock multiplier.)
The peripheral interconnect bus ("HyperTransport" for AMD and "QuickPath Interconnect" for Intel) is on its own, separate clock.