I'm assuming you're using NVidia 3D Vision and have it set up, right?
What version of PowerDVD are you using?
The GT 440 should be able to do it.
You should be able to finagle 3D on the Samsung, even though it's not listed as "supported" on NVidia's site (I've heard it done online via forums). I believe that you may need to use the regular Blu-ray disc, not the 3D version.
I used to have the Asus VG236H monitor and used it for 3D gaming and movies, and I forgot how to set it up
I used PowerDVD 10 Ultra 3D to do Blurays.