Desktop computers is what I have been messing with lately.
I am giving one final upgrade to my old faithful self assembled desktop PC (the one in the background), 24% higher clocked CPU (same architecture), more RAM (4GB as it is a 32bit system which does not recognize more) and a SSD system disk.
I can not ditch this PC, I have nostalgic feelings for it, it is "mine"!

It is an old single core 478 socket Pentium 4 Northwood running DDR400 and a AGP8x graphics card.
The other two are a couple years younger but still quite aged, I got them to up the ante a little.

Both are getting CPU and RAM upgrades, as well as SSD system disks.
I may give them graphic card upgrades since they feature on board graphics, but I need to be humble with it and watch the power consumption as I am stuck with the power supplies they feature due to both of them being proprietary HP Compaq computers. The big tower PC will receive a humble graphic card for testing, the SFF (Small Form Factor) PC will most likely stay utilizing the on board graphic card as it is a very small and compact housing and I do not want to push the PC's boundaries regarding power consumption and heat dissipation.
The small SFF PC will get a Core2Duo E8500@3.16GHz/6MB cache/1333FSB out of the big tower, and the big tower is receiving a Core2Quad Q9550@2.83GHz/12MB cache/1333FSB.
Messing with computers these past couple weeks brought back some good memories, but also reminded me why I stopped doing it.