Waited all day for FedEx with my Titan-Xs, the clowns left them downstairs by the mailbox. Anyhow, plug it in and BINGO, boots to desktop. It's called "Nvidia Graphics Device" but it works. Details coming, if anyone is interested..... And we already have a working EFI, fixes the name in System Profiler. Oh, and it runs a 5K just fine.