Unreal shut downs my system while rendering using movie render Movie Render Queue

Development Cinematics & Media
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1

Hi there, I have i9, 12900K, 3090 24GB, 64GB DDR5 RAM, 1200W PSU.
This rig worked great for over two years, not a single problem using unreal engine.
But now, for some reason, whenever I try to render anything using MRQ or legacy. System just crash, not the unreal, whole system crash. all displays turn black, I hear my youtube video playing for a few seconds then it stops. I see my CPU lights indicating as ON but there is nothing like ON happening.
I need to force shutdown the PC and turn ON again. This happens on every project, every unreal engine version, doenst matter if the scene is complex or not.
I have one other PC, same thing happens to it aswell. It has i7 13th gen, 32GB ram, RTX 3070TI and I think 650W PSU.
What might be the issue? It is affecting my work, I can not do anything. Please someone help.

2

wow, that could be anything from a bug to a post process saying ‘huh?’… i’ve always had a problem with renderer and just used nvidias screen capture while i waited for renderer to be fixed… but lots of other people have no problem i guess, might try to reinstall the engine or use another version… might try messing with your settings in renderer

3

I agree, the cause of this issue could be related to multiple things, both from UE, and the user’s system.

The described behaviour reminds of a similar problem I saw, involving a badly mounted GPU. However, since it’s also affecting another PC, that points the problem more in the direction of UE’s latest updates.

I think the best course of action here, besides a clean-up of GPU drivers would be a a full uninstall/reinstall of all Epic software in both PCs:

  • First, uninstall the engine, launcher, asset packs, etc
  • Next, open the registry directory HKEY_CURRENT_USER\Software\Epic Games\Unreal Engine\Builds, and delete any build entries
  • Finally, delete the folders %userprofile%\AppData\Local\UnrealEngine and %userprofile%\AppData\Local\UnrealHeaderTool
  • After that, no elements related to UE should be left in your system
  • Now, reinstall UE launcher from scratch, and only add the latest, most stable version of the engine (at the time of this post, that would be 5.6)
  • After the process is complete, test rendering with MRQ again