All these cards are confirmed to be supported on wiki, however..

Intel 512AGX HRU does not crack my AP.

Both ASUS cards crack my AP using pixiedust in first 5 seconds, however, if I change mac to random or even change last two hex digits it fails to crack my AP.

So, questions I have two fold.. The main one, can I get 512AGX HRU working? Why changing mac fails AP cracking?