I wanted to build a cheap server. After seeing some xeon e5-2650's on ebay for $50 each, I leaped before looking. I purchased a C8220 DELL motherboard which unfortunately doesn't use a standard ATX power supply. However, after looking into it, I was able to find a workaround. Today, the xeons came in the mail. I'm happy to say it works! I got it to run arch linux off a bootable usb stick.
There's still some work to do. The screw driver will be replaced with a switch. Originally, I was going to change the ATX converter so that one of the lines was using VSB 12 instead of a regular 12 V, but I'm not sure that's needed since I'm fine with manually switching it off (it shouldn't cause anything to get damaged, right?). I also need to find some cpu coolers that actually fit the motherboard. After that, it's just a matter of filling all the memory slots, and it will be suitable for my purposes.