Hey,
I recently bought a 128Mb Radeon 9800 Pro card for the sole purpose of playing Doom 3 as I'm sure a lot of people have done. My problem is that the game always freezes and kicks me out after the loading screen finishes, even on the lowest settings for everything. Also, Farcry freezes at the splash screen. Any suggestions? I heard maybe a bigger power supply might help?

Specs:

AMD Athlon k7
1.10 GHz processor (as stated in system properties, but optimum speed is advertised as 1.7 +)
512Kb DDRRAM
300W power supply
Windows XP