Thank you very much for your reply!!! 
I think my story wasn't clear enough
Because it allready starts when i didn't setup any pass through yet. (sorry for not mentioning)
So correct me if i'm wrong, you won't be able to use the raid card locally (for storing VMachines) when vt-d is enabled?
Again many thanks for taking your time for me, i really appreciate it!!!
With Kind Regards,
Emiel