A friend of mine is an avid online gamer, and wants to run a gaming server using an SDSL broadband connection (or maybe even a T1).
I'll do the actual building of the machine. We need to know what kind of specs to the machine needs though. Looking around a little bit I've seen talk of quad Xeons, which I would have thought is totally over the top, is that kind of power really necessary?

What info do I need to get to help specify the hardware here?