Thx for quick reply Bart,
I don't think it's driver problem, I'm using 23.10 now, and CS fps still low. And I've tried almost all drivers (10.80, 12.41, 22.40, etc). Other games runs perfect, I got 3600ish 3d Mark 2k1 score, not that bad....
Maybe it's memory problem? RAM is on my upgrade list...