I suggest you get the latest Nvidia driver. Run the installer and if it needs to rebuild it for your running kernel, it will do that automatically. Provided you have also installed the kernel source as well.
The RedHat updater will download and install the new kernel for you. Just make sure that you also download the kernel source.
If you don't have the kernel source installed, you can run the following from a terminal window or command line.
up2date --install kernel-source
This will go get the latest kernel source and install it.