[I suspect many of you fine folks will have advice about why the following is a bad idea, and you're probably right. This project may be ill-advised, but I want to do it ]
I'm looking to build a system with some particular network cards I own; I'll need 3 slots, each at least x8.
Additionally I'll need video, of course, but since this will be a server I can use integrated graphics or even a PCI slot (!), or of course a proper x16 slot.
The goal here is to spend as little money as possible, so I'm fine with something old and used.
I will not need great performance, so a board that only supports old CPUs is fine; for cost savings I'd want a cheapish CPU anyway
Size can be anything that fits in a standard ATX case; most EATX boards are probably OK too
I have tons of DDR3 ECC Registered RAM lying around, so an appropriate server board would be cool, but RAM is cheap so this isn't very important
Lastly, if there's an old model of a fully-built PC (or tower server) with the appropriate slots that I can get used (read: cheap) I'd probably be happy with that (although it wouldn't be as fun as one that I build)
Thanks in advance for your advice!