[ikk157]

Computer board with P2 or P3 is now useless i also have many CPU's + mother boards. and the only smart way if you really like to do something with those pc's you just pullout all electronics into body and use the body as a locker. because it has strong lock system with key. the old floppy drive and cd rom drive body is use to make a new MP3 or MP5 player and you can adjust it into your car.
2nd option if you have P4 you just attach a good HDD and a multi CCTV CAM PCI card and use your pc as a NVR or DVR.
The power supply of PC is use for many many purposes. just if you have a technical mind.

I like the idea of re-purposing the old system/parts into something that’s not even computer-related. 

Depending on the looks of the old parts, they’d make great decorative pieces as well! I’ve seen people filling up an entire wall with motherboards, and boy does it look absolutely gorgeous!

You can even make a “whale of fame” of CPUs, RAM chips and other components. If done right, that will for sure impress your guests. Heck, you can even do it in places guests won’t usually visit, such as your bedroom.

I’m not entirely sure what you mean by “P2”, “P3” and “P4”... are these just the intel pentium generations? (Since that’s what I got looking it up).