after Windows 10 1803 update and Amd 18.4.1 relive was unusable (stuttering ,game freeze)
back to 18.3.4 everything is ok
i7 4790K
16GB DDR3
Sapphire Rx 580 Pulse
Asus XG27VQ
Make a clean install with DDU.
Unistall any 3rd party (GPU) program if u have.
done that...same problems...games unplayable (even without relive)
What I observed in games is that CPU freq droped to low states (when game was freezing)...back again to 18.3.4 all is fine
Windows 10 Pro x64)
Power Limit? AMD graphics performance
Please post a screenshot as below: