Gaming on Hyper-V — Hyper-V GPU Sharing Made Easy

Works with 5090

$vm = “youVMName”

if (Get-VMGpuPartitionAdapter -VMName $vm -ErrorAction SilentlyContinue) {
Remove-VMGpuPartitionAdapter -VMName $vm
}

Set-VM -GuestControlledCacheTypes $true -VMName $vm
Set-VM -LowMemoryMappedIoSpace 1Gb -VMName $vm
Set-VM -HighMemoryMappedIoSpace 32Gb -VMName $vm

Add-VMGpuPartitionAdapter -VMName $vm

Source: