Intel Pentium E2200 @ 2.2 Ghz
Intel Integrated Graphics
Some random Dell motherbaord
2GB DDR2 300 mhz RAM
320 GB Hard Drive

AMD Phenom II N930 @ 2 Ghz
6 GB RAM DDR3
ATI Mobility Radeon 4250 336 MB video memory
640 GB Hard Drive
Some random HP laptop motherboard

Intel Core i7 2600 K @ 5.1 Ghz
ASUS P8P67 Pro
8 GB DDR3 1600 Mhz
Dual ATI Radeon 6950
180 GB OCZ SSD + 1 TB Western Digital Caviar Black
One of the GTAForums users nicely made this for me

This system in my sig has been sold, but it was a
Intel Core i7 970 Six Core @ 4.81 Ghz
6 GB DDR3 RAM
ATI Radeon 5870
ASUS Rampage III Extreme Motherboard
2xx 500GB HDDs is RAID 0

I also remembering messing with a server/monster gamer system for a couple days.. it isn't mine but I think I still remember the specs
DUAL Intel Xeon X5680 6 cores (12 cores, 24 threads total)
Quad nVidia GTX 480 in 4-way SLI
24 GB DDR3 1866 Mhz
8x OCZ Vertex 2 SSD in RAID 10 (1.3Gb/s read)
EVGA Classified SR2 Motherboard
1500 W Silverstone Strider Power Supply