I have two 20-amp circuits in the basement that serve only computers, and one of them tripped. It turns out that I had about 3/4 of the load on one line.

That's a lot of KW's being burned up on this frivolous persuit. Hmm... I'm not sure why I do this... but in lieu of figuring that out, I started them all back up and added 2 machines, a 2400+ and a A64 3400+