[1.1.19 b57957, win64] Crashed PC entirely

[Farzag]

I was playing a fairly large base that I'd upgraded from 0.18 with v1, and loaded again in v1.1. The game worked well for a few hours, and I was busy changing all of my train stations to have train limits when it happened:
* The entire screen became corrupted, as if it parts had shifted left
* The mouse was still responsive, but moved a big square block around
* After a few seconds, the mouse was no longer responsive
* Around that same time, a white icon-like image appeared randomly across the entire screen
* I could not take a screenshot. Alt-TAB and Ctrl-Alt-Del were unresponsive
* After another few seconds, the screen turned entirely black
* The HDD light was on near constantly.
* I waited a minute or so, then hard reset the PC, which rebooted normally

After playing nearly 800 hours, I've never had a crash with Factorio - let alone one that took down the entire PC I'll try to play again and see if I can narrow it down if it happens again.