IIRC a 1650 won't work with Poser 11, it might with Posern 12.  Nvidia put newer parts into the 1650 vs. the rest of the 1600 series so it has different driver requirements.

 

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13