BeamNG (And Automation) Crash my entire computer to the point of having to cut power

I know. Its weird. At first i thought my PSU was dying, but other 3D games, even some more intensive like Stormworks work 100% flawlessly.
I open BeamNG and the moment i try to load into a level the screen goes black, monitor claims there's no display input, audio cuts, keyboard and mouse become unresponsive, but the computer remains on. Except the power and reset buttons do jack. And i mean even holding the power button to do a hard reset doesn't do anything. The only thing left to do is to cut PSU power then reconnecting. I've tried downclocking the computer, resetting factory settings, updating drivers, updating windows, doing a clean reinstall of the drivers, issue persists.

Specs:
2x8 HyperX 3200mhz DDR4 RAM
MSI 450 Pro MOBO
AMD Ryzen 1+ APU 5 3400G
an SSD through sata with Win 10 64 bit loaded
And a 750 watts nearly 10 year old PSU that SOMEHOW is still kicking strong (Never cheap out on PSU, kids!)

I KNOW that its not a hardware limitation because a few months ago i installed beamng and i was able to play it at 60 FPS. I dont know why but i suffer the same issue with automation. I have NO idea what could be serious enough to give me a system hang of this massive caliber.

 

Forgot to say i solved it. Turns out it was an unstable overclock and now i feel dumb.