In Options only appear NVidia Geforce 8800 GTS to select but I don't have this graphic adapter, my graphic adapter is ATI Radeon HD 6850 ?

Wtf ?

I'm no great fan of the DxDiag reports, but in your case, I need to see the part of the report about graphics. There's a description of how to get it on the top of the FO-NV Tech forum.