I have the 378 NVIDIA driver loaded on a new machine, and have found that the tty console (CTRL-ALT-F1) resolution is awful, probably something like 640x480 .
Looking around here and elsewhere, it seems with BIOS installs the answer has been to add some lines to /etc/default/grub and off you go. Since I'm running UEFI, AFAIK grub isn't used.
The CPU is an i7 6700 and the mainboard has its own HDMI port, so in theory I could remove the NVIDIA card and use the Intel driver - I have that running on another machine and it works fine. In this case, however I need to do some OpenGL and accelerated video work, and the in-built Intel GPU isn't my first choice.
Anyone have the answer? The native resolution of the display I'm using is 1920x1080 (1080p) btw.