I built this computer. I think I know how to operate one.
And I'm not going to buy extremely out-dated consoles that use 5 year old hardware.
You may have hardware/software problems. My pc is older than yours - AMD 64 x2 4800+(2.5) 4 gb ddr2 800 and Sapphire HD3850 pcie 512 and RAGE runs perfect 30+ fps with large textures. This engine is x2 faster from Brink english s***. I can't play with this pc Brink but RAGE is perfect.(no freezes, no crashes, no bugs)
If you have time run 3D Mark 06 test and post your results. I have 8700 points.(this test is D3D but...)
The good thing is always to format c: disk before install new windows. no cfg-s for RAGE. if you change many drivers versions and you can't format/install new windows try to uninstall drivers normal and again in safe mode with driver sweeper program.
create and 2 dirs for cache :
WINDOWS 7 => (C:/)/Users/YourName/AppData/Local/id software/rage
WINDOWS XP => Documents and Settings\userid\Local Settings\Application Data\id Software\rage
I use win 7 x64 and catalyst 11.10 official