so i build a new pc and it doesnt perform as well as it needs to, i tried to play dirt rally. my pc should be able to handle it i think, it didnt. then i tried to play rock of ages and portal (portal 1) and they didnt perform good either. specs are 8gb ram - intel core i3 3,2ghz dual core. and graphics card is dual x r9 285. oh, im running windows 8.1