I went on a linux adventure setup everything and then go to play windows game and lmde-6-cinnamon-64bit doesnt have a proper driver. time to wipe and start over.
so dvi ports can pass audio. dvi out from old quadro with dvi to hdmi adapter into hdmi monitor with speakers just testing out things and I heard audio. amazing
[Also, that's well in-theme w/ folks running Win9X on x58-Nehalem. ]
Example: a R5 3600 is 99% 'compatible' with Windows 7. (IIRC, I even got all the USB ports working).
A 5600, will have more missing devices in DevMgr. (IIRC, stability was not guaranteed, too.)