Bushfiva,
The R710 was a desktop replacement (in 2010/2011 anyway..), but I'm not sure if it's one of the series / models that you mention. Intel's AC7260 card is somewhat cheaper than I had imagined, so if I can't dig out a different PCIe mini card to test for whitlist I think I'll just go ahead & get a couple of these on a PnPP basis (Plug & Possibly Play).
The old router & the even older router both have single, fully integrated boards & lots of dust inside...
Thanks for you offer & assistance - much appreciated!