If it is a fresh build from scratch, I usually...
- install mobo / cpu / mem / gpu into the case & PS and connect the PS on header on and give it a test-fire and set up BIOS (if you can't get this far it is not difficult to troubleshoot since it is at a bare minimum.
-connect the other headers and a CD rom and boot up
the ultimate boot cd and give memtest a run for at least a single pass, then run
knoppix to get a full os running so I can run an instance or two of
prime95 for linux and surf at the same time (since memtest is boring to look at). I like to give 8 hours for each to run overnight.
- At this point, good time to update the bios if needed since you have a relatively stable system. Hook up a floppy or make a CD since floppys are a dying breed... Time to install OS - connect your boot drive only, boot up to winxp (if you have time, a
slipstreamed version of XP SP2 can be really handy if you only have an SP1 or earlier, or want to integrate raid or sata drivers). I usually wipe out all partitions then create an initial 20gb parition for c: (anything more is testing of my patience) then boot it up and start installing the mobo drivers, then the gpu drivers then mabe office and all 3rd party stuff like virus, firewall and spyware utils.
- Connect it up to the network, go on line and start all updates (I like to remain off line for the previous step - some call it paranoid, I call it security). When finished, connect your other HDs and create partitions or install linux or both. Run a disk image using ghost or something, save it to your new partition and to DVD you have a good DR plan that can be used to recover XP very quickly.