What is the reason and/or fix for UE5 (5.03 & 5.1) freezing my whole pc?

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Found out that it’s c:\ drive (SSD) that’s freezing whole PC. (When using Dx12 and RTX)

So looks like Nvidia driver dumps some cache very quickly that fills SSD buffer and freezes it.

You see this in Task Manager—>Performance->Disk 1

Couple of details:

  1. My Windows Temp folder is moved away to D:\ Drive
  2. Freezes happen 100% while using Movie Render Queque (So it uses C:\ Drive as a cache folder before saving it to destination folder)
  3. Freezes happen a lot while using UE5 editor + Screen recording or screen sharing (again some caching goes to c:\ drive).

My guess is that RTX has some “lightmap” (stored points) cache, that it rapidly dumps to SSD.
Last process (that uses heavy copying to ssd) I see before freeze is “system.exe”.

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