Have you checked out your vmem usage? I saw a guy saying it was using 6g of ram, with my settings it doesnt use half that amount but maybe on higher settings it hits the cap easy and causes the judder, it certainly causes a judder as i found out in SoM and GTA when i passed the cap.
edit: Nvm i just read them benchmark results posted above, they said they got stutter on the tests on their fiji gpus, i was wondering why it was only Fury users saying it was juddery, and 290/390x users were reporting it nice and smooth.