I'm using SuSE 8.1 with driver 41xx and GF4 MX440 - no probs.
So first I need more informations.
cardtype, driverversion (tar or rpm) ....
the rpm packages from SuSE are dummy packages. You must deinstall them - install the packages from nvidia - run sax2.
In the /etc/X11/XF86Config the "load dri" must be deleted (read the readme from nvidia).
If this still don't work. Post again with a copy of the "/var/log/XFree.0.log" and the "/tec/X11/XF86Config"