mite be your tnt2 card,,there getting out of date now days and 27 frames a sec aint very good to start with,,with my old geforce2 im getting about 60 too 70<~~and over bases no less than 40fps,,you mite wanna update that card and get somthing new,,,geforce 2mx only cost about 39bucks now days,,,,and geforce 4mx ddr cost about 89bucks at 80 too 90fps on aces high,,,geforce 4ti4600 about 250bucks at 125fps