Is my PC trying to overclock itself??

[mineforce]

I built a pc just about a month ago, and it was first when i turned my pc on and started using it yesterday that i experienced the issue. Basically what happens is i'll be using for example google chrome or discord, and my randomly my screen will go black and all my fans go up to 100%, as if it was trying to overclock itself, and i have to restart my pc. I have downloaded the MSI Afterburner and tried to use that to set my fans speed to as low as possible, didnt help tho I have never had any issues like this before or experienced something similar. I have not overclocked anything, and everything is running on default settings. I'll put my specs below. Any help is much appreciated.

AMD Ryzen 7 2700
Asus Geforce RTX 2070 8g OC
Asus ROG STRIX B450F
Corsair Hydro h100i RGB Platinum (watercooling)
Corsair Vengeance 8x2 GB RAM
Corsair RMX 650 watt
Samsung 860 Evo 1TB SSD

[LauriHimself]

28 minutes ago, mineforce said:

MSI Afterburner

is for GPU only

 

how Long from turning your pc on to blackscreen?

maybe your AIO pump is not working?

 

Sounds like an overheating issue to me

[mineforce]

1 hour ago, LauriHimself said:

is for GPU only

 

how Long from turning your pc on to blackscreen?

maybe your AIO pump is not working?

 

Sounds like an overheating issue to me

I know that the afterburner is for gpu only but i tried it because someone said i should. Well it varies, sometimes an hour or more, other times after like 30 minutes, sometimes right after it boots so it varies.

Well im no expert at this stuff, but i do not believe its an overheating issue as i have an excellent aio cooler that stays under 40 degrees celsius at all times, even during stress tests. So yeah, i dont know.