It's a pretty good sign that your a total computer freak when your 6yr old son has a system most of us would die for. I primarily use my sons set-up for videocard testing and waterblock testing, and other minor misc. testing stuff. It's easy to use his system since I have converted an old Senfu computer rack into a testbed for me and a computer for my son. 

I just added a "homebrew watercooling kit to his system to round it out. Wanna hear some specs??? Here's some specs:

AMD T-Bird 1.2GHz at 1530MHz 
256mb PC 133
IWill KK266R
GeForce2 Ultra
3Com PCI 10/100 NIC
Custom watercooling set-up with DangerDen Maze2 block and OCHideouts MicroFusion Radiator 
Dual 30gb ATA100 IBM Deskstars w/ hard drive cooler
17" Monitor