Qubes gpu passthrough slow

so I tried qubes with gpu passthrough on windows 10 hvm but while benchmarking the performance is terrible. i get 20 fps average on heaven benchmark while on baremetal i get more than 100 fps. it is also strange because sometimes the fps suddenly jumps to 200 untill i restart the vm and then it goes back to 20 fps average. i followed the gaming hvm guide for gpu passthrough on qubes forums and the nvidia driver i installed is latest version and it is a laptop

Have you checked this thread: Poor GPU performance in Qube ?

Looks like the same issue as yours.

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Where do I find xen.xml?


disabled it but i still get 20 fps