Its a little misleading, as there are 4 processors each capable of 100%, the graph would have to be at 400% to be at 100% CPU. I am working to fix this but the system doesn't adjust for multiple CPUs by default.
Server hardware changes, software changes, if not for the advances in speed, but for securities sake we must upgrade. We got our moneys worth out of the last server, I imagine this one will last us quite awhile as well.