NVidia won't accelerate

Now that my problem with console-switching has been solved, I decided to push my luck and get acceleration to work with my Nvidia GEForce card. As instructed in NVidia's README, I installed the v1251 NVIDIA_GLX.rpm package. I also called switch2nvidia_glx and ensured that my XFree86Config file contained: "Load glx" in the Module section "Driver nvidia" in the Device section I've also installed the v1251 nvidia kernel module NVdriver in /lib/modules (a few levels down). Nonetheless, when I run "gears" I get only 642FPS rather than the expected 1100. Are my incantations insufficiently pleasing to the gods? If so, what need I do to appease them? Paul