MS is working closely with both Nvidia and AMD to make sure the drivers are not only the most recent non-beta but also working properly. Have installed on two machines now and both times it grabbed and installed the latest drivers from Nvidia.
Printable View
Yeah, Windows 10 was accidentally pulling an unstable beta from Nvidia's website at first and they had to patch it because it bricked a few systems. Oops. The issue has since been fixed.
To be fair: SE did say they could not guarantee compatibility of FFXIV with Windows 10 until some time in August. I think they are still doing their own internal testing.