witebanshee SG

i have a 750durron 128mb ram tnt2 model 64 and it gives me a benchmark of 1600+ and sets my res to 10 1024-768-32, but when i run the game, single player or multi player it gets choppy but i played it on a laptop(pen3w/stepspeed 850mhz 256mb ram 32mb ati) but it get a benchmark of 1500-1570 and it ran absulotely

i have a 750durron 128mb ram tnt2 model 64 and it gives me a benchmark of 1600+ and sets my res to 10 1024-768-32, but when i run the game, single player or multi player it gets choppy but i played it on a laptop(pen3w/stepspeed 850mhz 256mb ram 32mb ati) but it get a benchmark of 1500-1570 and it ran absulotely free of chop, so im wondering if my game is choppy cuz i only hvae 128mb ram or if its the CPU