GeForce 6200 extremely slow performance

I’m getting extremely slow performance (2.5 fps from glxgears) from my GeForce 6200 card with 512 MB RAM running on Ubuntu 12.10. I actually have to run Xubuntu as this performance Unity will not run past the background on my screen. NVIDIA software version was 304.48. This used to work a few revisions ago very, very well.

Yo u don’t find, that you should give more relevant infos?

glxinfo | grep -i opengl
cat /var/log/Xorg.0.log

would be the absolute minimum.