I've tried both Nouveau and the NVIDIA Binary Blob, and both are terrible in terms of performance, lag and graphics corruption. The binary also doesn't support the native resolution in console mode and requires you to use nvidia-xsettings to change anything. Both have been blacklisted for Ubuntu Unity shell as far as I can tell. What am I to do with the graphics drivers on this PC?
Your best option would be to search for ubuntu recommended nvidia drivers via