It could also be something about VBO + texture chaching, which doesn't work for my Radeon; there are so many variables it's hard to test, especially since I have no Nvidia procs to work with. I agree with using the good old troubleshooting forum for stuff like this, and I think it was a worthwhile bump.
The bottom line is, if you are getting GL_OUT OF MEMORY errors, start turning off graphics enhancements in bootloader or ff7opengl.cfg. Post processing, VBO, PBO, texture caching, then work backwards and see when it starts to crash again. Annoying that it takes a while to make it crash....
Edit: Yes, based on known working settings provided by CleverNameHere, postprocessing can work fine on newer Nvidia procs, and PBO and VBO should be turned off. These newer cards are so fast that driver speed tricks are unnecessary.