I have created a working Windows 10 KVM in Unraid to virtualize a physical PC. The VM boots from a disk fine with no errors.

I have an ASUS branded GE Force GT-520 GPU that I have passed through to the VM, along with the imbedded sound card. The GPU is recognized in Device Manager, reports as

Nvidia GE Force GT 520, but has the following error.

This device cannot find enough free resources that it can use.

(Code 12)

If you want to use this device, you will have to disable one of the other devices on this system.

Things I have tried to resolve this.

Verified that the GT-520 card and it's multi-function sound card are in their own IOMMU Group by themselves.

Checked the box to bind them to VFIO at boot, and rebooted the system.

Tried multiple drivers for the GT-520

Enabled PCIe ACS Override in VM Manager and rebooted. (Did not affect the Iommu Group fpr the GT-520 card)

Have since Disabled PCIe Override and rebooted again since it didn't resolve the problem.

Have tried disabling the GPU in device manager and then scanned for hardware changes to rediscover the card. Card was rediscovered but still has same error.

I am including the XML of the VM below and attaching diagnostics.

VM XML

<?xml version='1.0' encoding='UTF-8'?>

<domain type='kvm'>

<name>TOM-PC-VM</name>

<uuid>5cf260fc-40b7-f93e-4fdd-ba41c5f5d083</uuid>

<metadata>

<vmtemplate xmlns="unraid" name="Windows 10" icon="windows.png" os="windows10" webui="" storage="default"/>

</metadata>

<memory unit='KiB'>8388608</memory>

<currentMemory unit='KiB'>8388608</currentMemory>

<memoryBacking>

<nosharepages/>

</memoryBacking>

<vcpu placement='static'>4</vcpu>

<cputune>

<vcpupin vcpu='0' cpuset='2'/>

<vcpupin vcpu='1' cpuset='3'/>

<vcpupin vcpu='2' cpuset='4'/>

<vcpupin vcpu='3' cpuset='5'/>

</cputune>

<os>

<type arch='x86_64' machine='pc-i440fx-9.1'>hvm</type>

</os>

<features>

<acpi/>

<apic/>

<hyperv mode='custom'>

<relaxed state='on'/>

<vapic state='on'/>

<spinlocks state='on' retries='8191'/>

<vpindex state='on'/>

<synic state='on'/>

<stimer state='on'/>

<vendor_id state='on' value='none'/>

</hyperv>

</features>

<cpu mode='host-passthrough' check='none' migratable='on'>

<topology sockets='1' dies='1' clusters='1' cores='2' threads='2'/>

<cache mode='passthrough'/>

<feature policy='require' name='topoext'/>

</cpu>

<clock offset='localtime'>

<timer name='hpet' present='no'/>

<timer name='hypervclock' present='yes'/>

</clock>

<on_poweroff>destroy</on_poweroff>

<on_reboot>restart</on_reboot>

<on_crash>restart</on_crash>

<devices>

<emulator>/usr/local/sbin/qemu</emulator>

<disk type='file' device='cdrom'>

<driver name='qemu' type='raw'/>

<source file='/mnt/user/KVM ISO Library/virtio-win-0.1.204-1.iso'/>

<target dev='hdb' bus='ide'/>

<readonly/>

<address type='drive' controller='0' bus='0' target='0' unit='1'/>

</disk>

<disk type='block' device='disk'>

<driver name='qemu' type='raw' cache='writeback' discard='unmap'/>

<source dev='/dev/sde'/>

<target dev='hdc' bus='ide' rotation_rate='1'/>

<serial>vdisk1</serial>

<boot order='1'/>

<address type='drive' controller='0' bus='1' target='0' unit='0'/>

</disk>

<controller type='pci' index='0' model='pci-root'/>

<controller type='pci' index='1' model='pci-bridge'>

<model name='pci-bridge'/>

<target chassisNr='1'/>

<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>

</controller>

<controller type='pci' index='2' model='pci-bridge'>

<model name='pci-bridge'/>

<target chassisNr='2'/>

<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>

</controller>

<controller type='pci' index='3' model='pci-bridge'>

<model name='pci-bridge'/>

<target chassisNr='3'/>

<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>

</controller>

<controller type='pci' index='4' model='pci-bridge'>

<model name='pci-bridge'/>

<target chassisNr='4'/>

<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>

</controller>

<controller type='pci' index='5' model='pci-bridge'>

<model name='pci-bridge'/>

<target chassisNr='5'/>

<address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>

</controller>

<controller type='pci' index='6' model='pci-bridge'>

<model name='pci-bridge'/>

<target chassisNr='6'/>

<address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>

</controller>

<controller type='pci' index='7' model='pci-bridge'>

<model name='pci-bridge'/>

<target chassisNr='7'/>

<address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>

</controller>

<controller type='ide' index='0'>

<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>

</controller>

<controller type='virtio-serial' index='0'>

<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>

</controller>

<controller type='usb' index='0' model='qemu-xhci' ports='15'>

<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>

</controller>

<interface type='bridge'>

<mac address='52:54:00:11:e4:4d'/>

<source bridge='virbr0'/>

<model type='virtio-net'/>

<address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/>

</interface>

<serial type='pty'>

<target type='isa-serial' port='0'>

<model name='isa-serial'/>

</target>

</serial>

<console type='pty'>

<target type='serial' port='0'/>

</console>

<channel type='unix'>

<target type='virtio' name='org.qemu.guest_agent.0'/>

<address type='virtio-serial' controller='0' bus='0' port='1'/>

</channel>

<input type='tablet' bus='usb'>

<address type='usb' bus='0' port='1'/>

</input>

<input type='mouse' bus='ps2'/>

<input type='keyboard' bus='ps2'/>

<graphics type='vnc' port='-1' autoport='yes' websocket='-1' listen='0.0.0.0' sharePolicy='ignore'>

<listen type='address' address='0.0.0.0'/>

</graphics>

<audio id='1' type='none'/>

<video>

<model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>

<address type='pci' domain='0x0000' bus='0x00' slot='0x1e' function='0x0'/>

</video>

<hostdev mode='subsystem' type='pci' managed='yes'>

<driver name='vfio'/>

<source>

<address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>

</source>

<rom file='/mnt/user/Files/Asus.GT520.1024.110322.rom'/>

<address type='pci' domain='0x0000' bus='0x07' slot='0x01' function='0x0' multifunction='on'/>

</hostdev>

<hostdev mode='subsystem' type='pci' managed='yes'>

<driver name='vfio'/>

<source>

<address domain='0x0000' bus='0x01' slot='0x00' function='0x1'/>

</source>

<address type='pci' domain='0x0000' bus='0x07' slot='0x01' function='0x1'/>

</hostdev>

<memballoon model='none'/>

</devices>

</domain>

tower-diagnostics-20250608-1510.zip

Is there anyone out there who can shed some light on this? Any help is greatly appreciated.