According to the release notes, the Geforce 390.77 Game Ready driver provides the "optimal gaming experience for Kingdom Come: Deliverance, War Thunder, Black Desert Online, and Metal Gear Survive". It also adds or updates SLI profiles for Dirt 4, Hot Lava, Metal Gear Survive and Ode as well as adds or updates 3D Vision profiles for FIFI, Kingdom Come: Deliverance, and Metal Gear Survive.

Unfortunately, the new driver does not fix any bugs or issues as it is solely focused on these new games.

You can find the new Geforce 390.77 Game Ready driver for Windows 10 and Windows 7/8 in 64-bit flavor over at the Nvidia support page where you can also check out the full release notes.