I've been using RX560 for a year and half maybe and it was working fine until two days ago. While i was playing games the frames drop from constant 90 fps or 60-70 fps to 25-30 fps.
The only thing i did was i installed the lastest amd drivers, ClockBlocker and PRIO - Process Priority Saver.
I unninstalled everything even formatted my pc and tried installing a previous version of my driver it still having the same Frames drop issue.
It seems i found the problem...? Fans not spinning, temperature goes over the supposed part and GPU clock is dropping. Using AMD RX560 MSI 4GB btw