got it. gee, could be (my) eyes for all i know. any hoo, i got to your link. quite informative.
i've not gotten passthru to actually work yet via intel board and add-on ati cards. though i did finally get the latest linux mint to actually recognize one of the ati cards. a break through for me. not sure that vm is making much use of it though. your doc will shed more light. this whole passthru thing seems more trial and error for many of us.