If appears the Nvidia driver is having trouble detecting your Nvidia GPU. It also appears you have installed a version of the Nvidia driver that is:
(a) Not supported by Ubuntu; and
(b) The only version supporting your GPU according to the Nvidia website.
I am not sure what to do in this case. I suggest starting by uninstalling the driver you have manually installed and then use the 'Additional Drivers' app to search for a supported driver.
Thanks for the bug report.
If appears the Nvidia driver is having trouble detecting your Nvidia GPU. It also appears you have installed a version of the Nvidia driver that is:
(a) Not supported by Ubuntu; and
(b) The only version supporting your GPU according to the Nvidia website.
I am not sure what to do in this case. I suggest starting by uninstalling the driver you have manually installed and then use the 'Additional Drivers' app to search for a supported driver.