randing

SimonF, good catch, I have the same lines in my XML, removing and testing now. Update: the VM has been stable with Intel passthrough for roughly 36 hours now after removing the memory lines from the XML.

Edgard666, thanks for your thoughts, and good notes. I've tried every variation of VM configuration I could come up with and built VMs from scratch a few times while testing, all with the same result. I manually rolled back to 6.11.5 this week, but that didn't help. There seems to be a few people having the same issue:

Unraid version 6.12.4, Intel Xeon E-2288G CPU, ASUS WS C246M PRO/SE motherboard, 64gb of Samsung M391A2K43BB1-CTD ECC that passed 24 hours of memtest86, SilverStone FX600 PSU, Windows 11 Pro VM (also tested Server 2022). New to Unraid this year, so not a lot of experience with versions prior to 6.12.x. Having an issue where Windows VMs with GPU passthrough eventually lock up with all CPU cores pegged at 100%. Passing through an Nvidia GPU or Intel UHD causes the same behavior. Sometimes it locks up within an hour, sometimes after a day or two, Nvidia seems a bit more stable. A second Windows VM configured the same way but with VNC virtual graphics runs fine.