VM crashes after adding GPU

[Seven7527]

So I watched SpaceInvaderOne video on creating Mac OS VM. and wanted to add my Gpu to it. but everytime I do it crashes. I see in the coments below the video on how people fixed it with ajusting XML file. but it will not even boot when I try after adding the GPU. I am afraid to try to add my GPU to my Windows VM for fear of the work to get it setup and then I would have start all over agin. Am I mssing something? On my mother board I did emable IOMMU in the BIOS. here is what I am working with. any help thanks

 

ASUSTeK COMPUTER INC. TUF GAMING X570-PLUS (WI-FI) Version Rev X.0x 

AMD Ryzen 5 3600

GeForce GTX 1660 Super