Gtx 880m issue

Hello all, i have laptop Alienware with graphic card gtx 880m, yea i know its old graphic but its working its job, well at least it should be, i have a problem, my gtx 880m doesnt give a half perfomance it should give, as i looked over internet, graphic cards with the same name gives way better fps and overall perfomance in games, like many ppl were able to play warframe for example at almost high settings on 1080p, i am TRYING to play it on lowest settings possible on 1366x768 and i have fps issues, my 3DMark score is like 600?! others gtx 880m have at least scores like 2500-3000 ?, also what i realized, it doesnt have heat problem, BUT its Frequency or Mhz how u call it, its working around 950 UNTIL i enter any 3d application, once i enter any game or smt its Mhz falls down to fixed 270 and it doesnt move, now iv been lookin if theres any like battery saving mods or smt and didnt find anything, please help i am hopeless