Nvidia NVS 510 EFI

[brand]

I have a Nvidia NVS 510 that works fine in a Mac Pro 4,1 but would like to flash it with EFI so that I can have a boot screen. Has anyone had any luck flashing the NVS 510 with EFI?

 

[MacVidCards]

I have a Nvidia NVS 510 that works fine in a Mac Pro 4,1 but would like to flash it with EFI so that I can have a boot screen. Has anyone had any luck flashing the NVS 510 with EFI?

AFAIK, we are the only place to get custom roms done.