Question Drivers crashing on startup

Dec 1, 2020
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So when i turn on my pc i log in in windows and then for 3-4 seconds everything seems normal then my screen goes black and my keyboard and mouse stop working from outside pc looks like it still works. and when i reboot my pc by holding power button everything works fine only i get notification that default wattman settings have been restored to default settings. This started happening 3-4 days ago before that everything worked normal
frist i suspected my ram because i had 12gb and changed to hyperx predator 2x8gb 3200 mhz but i don't think its ram because im getting driver fail i had my gpu udervolted for 2-3 weeks and everything was fine it was 100% stable i played rdr2,bf1,mafia 3,pubg,r6. And those crashes don't come every time only like in 4-5 boots
my spec
R5 1600AF
XFX GTS XXX RX 580 8GB
16GB 3200 MHZ HYPERX PREDATOR
ASUS A320M-K
600W PSU