I have not, but I did install on an XYC X3 Mini PC, that uses a Celeron 1037U. It works great as a faux extender that hits a HDHomerun Prime for live TV. I would not ask much more from it though. Certain would not have it serve more than one stream.
What model fanless PC are you looking at? The trick is to find one without eMMC storage, as Win 7 cannot support it.