Here are the specs:
Dell Optiplex 750
4GB DDR2 Ram 4X1GB
580GB HDD Space
ATi Readon HD 2400 XT 512MB
AMD Athlon 4400+ DualCore 2.30GHz
Games I can run:
Any Quake mod (well almost any PC can run them xD).
Call of Duty 4 Low w/ Specular Map at 1280x720 60-100FPS (If I turn on AA it goes to 10FPS xD).
Call of Duty 5 Low at 1024x786 Textures High at 40-60FPS.
Counter Strike Source Maxxed at 1280x1024 incl AA. at 35-50FPS.
Killing Floor maxxed except AA at 1280x720.
Fallout 3 according to Canyourunit.
Fallout NV according to Canyourunit.
Call of Duty Modern Warfare 2 according to Canyourunit.
FarCry 1 Maxxed at 60-100FPS.
I'll post more when I test 'em.
I may upgrade the GFX card though.