I don't know SuSE but that option in SAX is probably refering to opensource opengl glx modules and drivers for Matrox , nvidia , and 3dfx cards. (Utah-GLX project)
That uses the DRI direct rendering interface in the Linux kernel ( as opposed to agp gart support in Linux)
Nvidia's driver and GLX modules are not built on Linux DRI. They are not compatible.
I am not sure of the full procedure youi should follow to get the Nvidia drivers working but you almost certainly want to answer NO to that SAX option.
Check your XF86Config file for references to dri and glcore and # comment them out.