Currently I'm again on the latest version of BIOS, 5602. PSU is almost 3 years old. I also tried setting FCLK to half of the RAM speed, but nothing changed.
PC specs:
CPU: AMD Ryzen 7 3700X
MB: Asus Prime B350-Plus
GPU: ZOTAC GeForce® GTX 1060 6GB AMP! Edition
RAM: Kingston HyperX Fury 2x8GB DDR4 (2400MHz at stock)
SSD: Samsung 850 evo 250GB
PSU: 550W EVGA SuperNOVA G3 80+
As the title says, my PC keeps restarting, long before Windows lockscreen...