As reference, my current graphics settings are Dynamic (or whatever the “Adaptive” setting is called") for all except for Performance Target, which I’ve set to Unlocked. I’m currently playing on a 1080p 144hz Freesync monitor with Freesync on, if that helps any.
Regarding drivers: 17.10.3 is the current version. I’ve used DDU and reinstalled drivers to no effect. It may be worth looking into downgrading the drivers, maybe to the FM7 release driver, if the new drivers are the problem.
System specs (from AMD Settings):
Radeon Software Version - 17.10.3 Radeon Software Edition - Crimson ReLive Graphics Chipset - Radeon RX Vega High Bandwidth Cache Size - 8176 MB High Bandwidth Cache Type - HBM2 Core Clock - 1590 MHz Windows Version - Windows 10 (64 bit) System Memory - 8 GB CPU Type - AMD Ryzen 5 1600 Six-Core Processor