I use lunix on my 24 core CPU boxes, but the video card setup is almost impossible to setup in linux, so I have been using XP for those.
And yes, XP 32 but works perfectly on a GTX 780, so that why I say I will never buy AMD anymore. And yes, I do have 10 boxes or more and its a waste for F@H to buy the latest Microsoft OS every time I get new hardware.
As for being accused of being rude, when you go on AMD's site to download drivers, it has you pick your OS, then gives you a button to click for download that you assume works for that OS. Until you read the fine print, its not obvious that it WON'T work. Any everybody getting on my case for not running the latest OS is NOT helping me, that why I said thanks for no help. And as for research before I buy ? Nvidia supports XP, so I just assumed that AMD would, as I thought they were competitive, but I guess not.
There are others that have made good suggestions, and to those, I thank you,