I’ve actually figured out that it’s caused by having the in game vsync turned on. When disabled it’s fine, but I’m not sure why it’s causing an issue as I’m also using freesync.

Do you also have the issue with D4 where the in game menus are laggy when opened? For me the GPU hits 100% usage and the fps drops. Once I close the menus/inventory it’s fine.

Try jiffy reader.

https://github.com/andrewbanchich/shreddit

I’ve been a linux user since 1996. I’ve used a lot of distros over the years slackware/gentoo/debian/arch/redhat/ubuntu.These days I’ve been running Fedora and find it pretty great. I’ve gotten a bit too lazy for distros like Arch and prefer something that just works without too much tinkering.