At long last, my Nvidia Maxwell card worked out of the box on my 4K monitor using the nouveau drivers that come with fedora 24! I no longer need the nvidia binaries to get a non-black screen :-).
But speaking of 4K monitors, in tty mode during boot the characters are about the size of gnats.
Will the SYSFONT=latarcyrheb-sun32 kernel parameter give me a larger console font these days, or is there some other magic required to change the default console font?