I searched "asus 939" on newegg and do not see the word "video" in any of
the descriptions nor do I see a video port in the pictures. What criteria
are you using in the search?
My preference is an ASUS board.
There is a chipset called ATI RS480, that is supposed to work
for S939 motherboards. Use a search engine and see what companies
made motherboards with that chipset.
Personally, I would sooner buy a "mainstream" motherboard, and a
cheap PCI-Express video card, than be stuck with a chipset that
is so uncommon. How much help are you going to be able to get
from the user community, if you buy an obscure motherboard ?
Say you want to run Linux for example...
Some motherboard brands have virtually no useful tech support, so
the user community is all you have to fall back on (other than
throwing the motherboard into the landfill). If a lot of people
aren't using the motherboard you plan on buying, you shouldn't
use it either.
Paul