system
A chat on subreddit /r/pcmasterrace
human
I had this, turned out to be a dead ram stick. Once the load is heavy enough for it to need the dead stick it crashes. 

Normally a pc doesn't boot when you've got faulty ram, but with fastboot it'll just boot. 

Doesn't mean the ram is dead, could just be not inserted completely
gpt
I replaced the 32gb 3200mhz of ram i had installed with 16gb of 3000mhz and i had the same issue.