many people have only one Hard Disk on their PC( like me), thus there's no escape from choppy runnig of latest games. but i experimented with virtual memory BY PLACING IT ON A "PEN DRIVE", it worked wonders for me.( i have a 512 MB pen drive & a 256MB RAM). the game i played was Need For Sppeed Most Wanted. i'm not sure whether it'll work for others, but ther's nothing wrong in TRYING. if still you are not happy with your PC's performance, go in for a PCI card(orAGP).