PSA: Nvidia just released a hotfix driver

While it doesn't specifically say that it fixes Dark Souls III, I have noticed that I no longer spike down in FPS any time the game saves.

https://forums.geforce.com/default/topic/930978/geforce-drivers/announcing-geforce-hot-fix-driver-364-96/

Also, here's a post from an Nvidia employee:

will this driver fix the framerate issue in 600 series cards? across all games? even dark souls 3?

Yes it includes a fix for the FPS drop across games.

https://forums.geforce.com/default/topic/930978/geforce-drivers/announcing-geforce-hot-fix-driver-364-96/post/4858744/#4858744