I havent had FPS drops for a while, maybe crash once a week which is pretty good compared to the time's I used to crash.
Cpu 2Ghz dual core
ATI Radeon 5700 series HD.
Running fort wars on maximum graphics with around 200+ FPS.
It still drops once in a while when I log in, after loading all seems fine.
I can really recommend this video card, bought it for 160 euro back then.
Will be around 120 euro's by now I supose.
Some people are stuck with their budget, tell me what your going to spent.
Might know something for you.