Yesterday i had some issue with the CPU passthrough of my TR 1950x (Windows 10 1803 as guest with QEMU/KVM, BSOD under install). But i did get it running after i did what was suggested in the last post.
Now i have the same problem again. After switch back to coreduo, the Windows VM startet successfully. Now i have the Error Code 43 to deal with of the nVidia GPU. It is like a never ending storry 
but i feel i am getting closer to the finish line 