I had one of these Dell PC's. I picked it up after a company went belly up sometime around early 2000ish? For about $5, it wasn't too bad.
In any case, my primary computers were all far more powerful, so I attempted to use the Dell as a simple file server. Unfortunately, it bit the dust before the year was over so I cannibalized the Dell for parts and, yep, you guessed it. I used the Dell PSU in another spare computer I had sitting around. Smoked the motherboard. Did a bit of research and that's when I found out about the proprietary pinout ---That which is odiferous and causeth plants to grow---.
I gathered all the original parts, went outside, shot it all up a few times, then tossed the remains into the dumpster.