Help with gaming resolution :( no 1680x1050

hi, i dunno why but in every game i play, no games has the 1680x1050 resulution i use, i have tried to go to the config file for the games but then the games just resets the resulution, im using a gtx 560 sli setup, right now im having an nvidia gtx in the top and a inno 3d gtx in the buttom.

4 weeks ago it was working but then the inno 3d was in top and the nvidia was in buttom. i changed em because my pc wasnt working so i fixed it but now the resulutions for the games dosent work   i have tried to change em back but then my screen wont even turn on  

sorry for my bad english, but hope u guys can help me