Nothing special about the card except that it will display EFI boot screen. The card was priced reasonably compared to other Mac pro cards. It came quickly and very well packaged.
This is for emergency use.. when you have problems with aftermarket PC GPU in your MacPro.
Somehow I let my original GPU go, and needed this to support reflashing my Radeon R9 280x 4K GPU. The price is not great for such an outdated card, but hey it has native Mac EFI OpRom so it boots up clean with all the EFI boot screens.