i've noticed that if i set affinity with Steam first, the affinity will automatically be set with Source when i load it up. But even still, i've tried to manually set affinity for Source after it is up and running, and in both cases i get the same results.
Something i thought i should mention...
X2 3800 @ stock on XP-90c 92mm fan
DFI LanParty Ultra-D w/ Latest Bios from DFI
OCZ 2GB(2x1GB) PC 3200 Platinum 2-3-2-5
Powercolor x850 XT 256mb
OCZ Powerstream 520
Windows Media Center XP 2005 SP2 (update rollup2 NOT installed)
Whenever i try to play any 3D graphics program, it will run...