I've played the Early Access version a while ago, ran around the beach for about 30 minutes and everything played well. Afterward, I stopped and waited for the full release.

Now that the full game is released, I can see frequent stuttering. It happens in the main menu and inside the game. I can see it happen as the game stutter, but also as my frame rate seems to dip a little. For example it'll go from 115 to 105, or at higher settings from 50 to 35. I'll be standing idle in a spot and see my framerate go from being stable to dropping by 10.

I've tried reinstalling the redist coming with the game, tried changing my settings, tried much older drivers (both the most recent AMD drivers and drivers 1 year older). Despite what I do, this issue seems to remain.

My specs are:
i5 4690k
R9 390
16gb DDR3
Game installed on SSD
Windows 10 Pro + second installation Windows 10 Enterprise (issue happens with both)


I'd like to know if anyone has tips on what to try. I can offer more information if needed.