Question Computer freezes completely after prolonged Blender use

Sep 6, 2020
This is a really tough issue I've been trying to figure out for a week or so but can't make any headway. Basically, after a couple of hours straight of working in Blender, my computer will become completely unresponsive. My monitors (some connected to motherboard using integrated graphics, some to GPU) all freeze, and the computer is unresponsive to keyboard/mouse input (pressing CAPS LOCK doesn't toggle the light, etc.). If I happened to have some music/a video playing in the background, it'll keep playing whatever I assume was left in the cache, and then stops. The fans all keep running, and nothing sounds different from the PC case. The computer will stay frozen like this until I hard shutdown. have tried using the shortcut to restart the graphics drivers and so on, but this did nothing.

I have already tried all the big tests (3Dmark, Prime95, sfc /scannow, Windows memory diagnostic, Intel processor diagnostic, etc...) and they all come back OK. Tried disabling C-states in the BIOS as another thread elsewhere suggested, and that didn't help either. I'm at a loss as to what might be causing this. I realize that the issue may not particularly involve Blender -- it's just the only thing that's fairly consistently reproduced this issue after a few hours of use.

My specs:
  • Windows 10 Pro, 64-bit
  • ASRock H370M Pro4 motherboard
  • Intel i5-8600 CPU (with Noctua NH-D15 cooling fan) (1 connected 1080p 60hz monitor w/ DVI)
  • 24GB DDR4 RAM (2x Corsair 8GB DDR4, 2x G.Skill 4GB DDR4 -- some frequency timings are different, not sure why this would cause any problem now it hasn't caused before though)
  • NVIDIA GeForce GTX 1060 3GB (1 connected 1080p 60hz monitor w/ HDMI, 1 connected 1440p 144hz monitor w/ DisplayPort)
  • Seasonic 750FX PSU
I'd really appreciate any ideas as to what might be responsible here -- I don't have the cash to guess-buy new parts at random until this works itself out :p
Let me know if there's any relevant info I left out. Thanks all!
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