That is good data to know. I'll have to put that into Excel. That is also good info about Win2K vs XP.

To keep costs down, I intend to buy just the minimum to make a running system. Off the top of my head without being precise, I'm looking at buying the motherboards, chip, ram, and power supply. No case, no fancy extras. The case will be something custom made (it's being designed in Solidworks at the moment.) But I'm curious about other things... is it possible to have 1 OS installed and use the other motherboards as a diskless system? Meaning that there's 1 OS installed, 1 hard drive, and have the motherboards work from that? According to some web sites Windows Terminal Server could be used for a diskless system.  I'm leaning towards a diskless system.

What are the Windows booting options is another quick question. Boot from a CD.. over a network? If all these motherboards are going to be networked, it would be nice to use one OS or at least a minimum of OS. Licensing issues aside.