After updated to 7.4.0 my NVIDIA gpu fan started to work on full speed non stop. i have 2 gpus , Nvidia 2070 for passthrue to VM windows an other amd Rx 6600 for immich and jellyfin transcoding.
aparentlly the amd gpu is fine, but the nvidia's fan reved to max and when i try the vm windows this craches. when i thry NVIDIA-SMI comand on terminal it gives me the has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.

Is there any fix? cant find eny info on forum..

Thanks

nascasa-diagnostics-20261113_1739.zip

There are a few separate things here.

The VM crash: the server ran out of RAM. When the Windows VM was running, the kernel killed it to free memory (Out of memory: Killed process ... qemu-system-x86, Windows11). The Windows VM was using about 20GB, the Home Assistant VM about 4 GB, and the Satisfactory server, Immich and Jellyfin also need memory. The ZFS cache can use up to about 6.4 GB too. With 32 GB there isn't enough RAM for all of that. Edit the Windows VM and lower its memory to 12 or 14 GB, then try again.

nvidia-smi: this error is expected. The 2070 is bound to VFIO (Tools > System Devices) so it can be passed to the VM, which means the host NVIDIA driver can't use it. If the card is only for the VM, you don't need the Nvidia Driver plugin, and you can remove it. The GPU Statistics plugin is also trying to read the card, which adds the repeated NVRM messages to your log.

The fan: when the card is bound to VFIO and the VM isn't running, no driver controls it, and some cards, especially blower types, spin their fan fast in that state. Please check two things:

1. Does the fan go back to normal once the Windows VM is running with the NVIDIA driver installed inside Windows?

2. Was the card already bound to VFIO before you updated to 7.4.0, or did you change anything else around the update?

If the VM stops again after lowering its memory, please post new diagnostics right after it happens.

thanks for the info...
did what you sead lowering the ram, and the VM worked smooth. i updated the graphic drivers on windows and tested it with some games. It worked fine. tried to install msi afterburner and lower the fan true it but no luck. didnt work.
the fan continues on max speed. it never goes down.
yess. the card was already bound to vfio before update and every thing was working fine. the fan was working as intended(very low on no load and whold get faster on load with temp raising.) i dint change nothing before and after update.

added da diag file from after testing windows

nascasa-diagnostics-20261113-1936.zip

Good to hear the VM is working well now.

While the VM is running, the card is fully controlled by the NVIDIA driver inside Windows, and Unraid can't change the fan speed from the host. If the fan stays at max even with the Windows driver loaded and Afterburner can't lower it, that points to the card itself rather than the Unraid update. Please try these:

1. Shut the server down completely, unplug the power cable for a minute or two, then power it back on. A normal reboot doesn't fully reset the card.

2. When the server powers on, watch the fan during POST and the BIOS screen, before Unraid starts loading. Is it already at max there?

3. In Windows, check GPU-Z or Afterburner and note the fan speed (% and RPM) and the GPU temperature it reports, at idle and under load.

If the fan is already at max during POST, or the fan RPM shows 0 or nothing while it is clearly spinning fast, the card's fan or its speed sensor is likely failing. In that case the card goes to full speed as a safety fallback, and no OS or driver setting will change it.