Its specs say that its Front Side Bus is 800MHz or 1000MHz, so can it support a CPU that has 2000MHz Bus? Also, is it good for gaming? cuz i want to put a AMD X2 4800+ on it, and run it for lineage 2.
It supports 1000MHz Hyper Transport (2000 MT/s), so yes it does support the AMD X2 4800+ (socket 939).
Yes, it is good for gaming. Not the best board in the world for overclocking, but it is a stabe board with some nice specs. But the question is, if you are building a NEW system, why 939? I'd recommend going for the AM2 if you are sticking to AMD, or even better, a core duo system.
Much more? Not at all. About the same in most cases. Where are you shopping?
But again, if you are building a new system, Intel's new core duo lineup is the best CPU on the market now, better than the AM2 CPUs in pretty much every way.