Just reinstall the game.been up and running ever since
hopefully works for you till a patch is released.
make sure to delete the left over file (Days Gone) after uninstall at
local disk (c;)/users/username/AppData/local/DaysGone then reinstall game
may be temporary more below.
(if your not using steamcloud dont delete save file..its on by default)

it appears driver 466.77 doesnt play well with this game.so before installing old driver
466.47 use DDU uninstaller in safe mode and uninstall like your installing new card
then reinstall driver 466.47

if you still have crashes after that (should be minimal at this point.use nividia Debug

also you can try playing game in run as administrator create a short cut from the
DAYS GONE game file SteamLibrary\steamapps\common\Days Gone\BendGame\Binaries\Win64
and create a desktop short cut of the Days gone application file.
then left click short cut once then right click and choose run as administrator.
with these you should be able to
stop the crashes freezing and driver crash good luck.
i recommend you do them all.but just 1 may work

1 more thing DO NOT use render unless you have a Monster Rig
leave at 100

'Stuttering"
though i'd add 1 more thing for stuttering try fastsync with vsync on in game also use gsync if
you have it.and turn triple buffering on and off while your using these settings.
it smoothed it out for me.