I'm trying to upgrade my AMD processor to a better model, my motherboard specs say the processor has to be 89 watts or less and supports a bus speed of up to 2000 Mhz. The processors I'm looking at ARE 89 watts but the bus speed range anywhere from 2200-3000. My question is, is it safe to have a processor with a higher bus speed than my motherboard specs say? If not, then I won't have any other choice but to get a better motherboard, which I really don't want to do.
All modern AMD processors use HyperTransport. The processor will simply operate at a slower bus speed. HyperTransport is backwards compatible and will properly handle devices with different speeds. From page 6 of http://www.hypertransport.org/docs/wp/HT_System_Design.pdf:
I don't see why installing such a processor would be unsafe, as long as the processor and motherboard sockets are compatible.