GeForce 9500 GT, works, didn't need to try cause glGetString says OpenGL 3.1... And about the 9600, many vendors list their cards to support 2.1 but don't mention 3.0/3.1 even if they do support it. Most 2.1 capable hadware supports 3.0/3.1. Dunno about 3.2 though, It might contain some stuff that you need a new card for (for example the ATI 5xxx series), but as said, I'm not sure.