So I’ve been looking around since yesterday for a fix for Grim Dawn stutters. My setup is a Ryzen 1600x, GigaByte 1060 6gb, and 8 gigs of ram. My fps hover around 80-100 yet every 5 seconds it would stutter for half a second, without fail.
After some trial and error, I solved it by opening my task manager and setting the affinity of Grim Dawn to CPU 0 and 1.I didn’t change its priority.
Been playing for an hour since and it’s buttery smooth, so my guess is it doesn’t play well with multiple cores. Hope this helps others who had the same problem as me.