Hi Phil, I installed based on your instructions... yum --enablerepo=elrepo-testing install kmod-nvidia-340xx nvidia-x11-drv-340xx nvidia-x11-drv-340xx-libs I rebooted and things "seem" to be working. rpm -qa | grep nvidia shows the driver installed, /var/log/Xorg.0.log shows NVIDIA up and running, a remote screen shots shows what I expect. Not sure about the low level changes you mentioned. I also need the 520M driver if possible. Thanks, Jerry