In short...

[e633]

The most simple thing to do if we want a computer capable of 60 fps\sec when playing HL2 is ask to Valve: "what is the configuration used at E3?" :bounce:

 

[x84D80Yx]

just buy a 6800ultra or r420XT and get 100+fps at 1600x1200

 

[ComradeBadger]

Or you just go on the guidelines that 9600 Pro + will play it well...