I don't know much about dual processor motherboards, what the advantage would be vs. a single at higher, say like a dual Cel 366@550 vs. a single P3-750?
I tried seaching for some articles on it but had no luck.
The advantages would be in running an OS/software that is capable of multithreading tasks(handling more than one stream of data at a time). Examples of multithreaded environments: win 2k, 3d studiomax, etc. Also you could use one cpu to run a server or game server(Quake3). If you are in a true multithreading environment the dual will be more beneficial. Otherwise if you just do net surfing and game playing you won't see much increased performance with a dual mb. As for actual raw scores, speeds, and benchmarks: I don't know where to get that info.