Congratulation, does HDMI audio work on your Pascal card?
So far, it looks like not. But tried once only, connected to tv with movie. Will test again tomorrow! And web drivers work surprisingly well, screen switching, mirroring with TV and other monitors all instantly proper resolutions!
Also, I should mention that all works with CMS enabled in BIOS, legacy OS, all looks stable. The only small thing is, the computer does not turn off with Shut Down command, looks more like a hibernate, can wake it up with a click of a mouse!