A new firmware upate for the nVidia cards. It's safe to update because it's not touching the main firmware (if you have an overclocked Asus or other don't worry) but just the displayport firmware to enable the latest DisplayPort 1.3 / 1.4 features.

it's fast and safe, just do a reboot after the update.

https://www.nvidia.com/object/nv-uefi-update-x64.html