Computer Setups/Stats/games/how?

[XFA]

Manufacturer: None (Built it myself)
Processor: AMD Phenom 8450 @ 2.1GHz (3 cores)
Memory: 2048MB DDR2 @ 800MHz
Hard Drive: 800gb (640gb + 160gb)
Video Card: NVIDIA Geforce 8600GT (Winfast)
Monitor: Benq 20"
Sound Card: On-board
Speakers/Headphones: Sony speakers via stereo system
Keyboard: Dell SK-8100
Mouse: Logitech G500 (5700dpi)
Mouse Surface: Razer Goliathus Control Edition
Operating System: Windows XP / Debian 5
Motherboard: ASUS M2N-MX SE PLUS
Computer Case: Cooler Master 690 NVIDIA Edition

I play minecraft, tf2 and hl2:dm