[ovirt-users] How to passthrough GPU to windows guest

Hi, I'm trying to passthrough gpu card to windows 7 guest, but I got the error code 43. I use ovirt node: ovirt-node-ng-installer-ovirt-4.1-2017032304.iso and ovirt-engine-appliance-4.1-20170322.1.el7.centos.noarch.rpm I have added options "intel_iommu=on rdblacklist=nouveau pci-stub.ids=10de:1380,10de:0fbc" to the grub.conf and attached these devices to the guest. After I have installed the gpu's driver, I got the error code 43. Did I miss something? Any pointers or suggestions would be greatly appreciated. Thanks in advance. Yiimao Yang.