This question was already asked a few times already. The threads where it was asked were closed due to low quality answers.
I can confirm that none of the answers worked for me - I upgraded the Kernel to 4.4.9 (and various along the way) - and tried various latest NVidia packages.
To no avail. To make matters worse - the default nouveau drivers work properly - but suffers screen shearing/bad update rates on a 765M SLI configuration with I7, 16GB memory.
If there is somebody that SUCCESSFULLY installed NVidia provided drivers with Ubuntu/Kubuntu kerner 4.4 and up - then please do share your secret.
PS: Just for a chuckle - I went the NVidia route as I previously had endless issues with ATI Linux drivers. It seems like NVidia has caught on/up to ATI in this regard...