System: Ryzen 5600G APU + Intel Arc 16GB LE in PCIe 3.0 x8 slot + NVIDIA GTX 1650 Super in PCI 2.0 x4 slot (behind B450 chipset). Also PS/2 mouse...
This setup was freezing randomly, until I discovered that I need enable MSI (message signaled interrupts) in registry for NVIDIA card. Now it works without freezes, finally.
The key to be added is like this:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\PCI\...\...\Device Parameters\Interrupt Management\MessageSignaledInterruptProperties]
"MSISupported"=dword:00000001
Where ...\... is system specific adress that has to be found (just go to Enum\PCI and search NVIDIA and check that there is a name of your GPU).
Then add MessageSignaledInterruptProperties key and dword value MSISupported = 1.
Now both Intel, NVIDIA and even AMD work together in Windows and seems finall stable:
It is very important that all GPUs have negative IRQ in device manager. Also beware - updating NVIDIA driver will disable MSI interrupts and registry must be manually edited again. I prefer manual editing by regedit withou using unknown thirdparty tools.
Those MSI interrupts when they are not enabled might be behind sound stutters on some systems too. There is not much info on the internet on this topic, but it might be very important to solve random freezing in some system. Pay attention to the messages in bluescreen, if it contains DPC_WATCHDOG_VIOLATION then it is IRQ problem.
What helped me a lot are those topics:
Puget system:
https://www.pugetsystems.com/support/guides/updated-watchdog-dpc/
Guru3D:
Link Copied
