Gigabyte 6870 OC Mac Pro 4.1 EFI Flash Help?

[SmartViewYTC]

Hello there!
I decided to upgrade my stock GT120 to a Gigabyte 6870 OC (3 fans). It´s supposed to run out of the box in Yosemite but without the bootscreen.
Is there any way to flash the EFI to the cards Bios to get a working bootscreen?
I found a few ROM´s but they were all for other cards like the HIS ICE-Q or the XFX version.
My Mac Pro is a early 2009 model and runs OS X 10.10.5 and Windows 7.

Best regards.

 

[Fl0r!an]

That's what you have to do: http://forum.netkas.org/index.php/topic,692.0.html
This will give you bootscreen on one of the DVI ports.

I also have a slightly improved EFI which gives bootscreen on passive DisplayPort connections (besides that it's identical), should be somewhere in this thread: http://forum.netkas.org/index.php/topic,10827.0.html
Instructions are the same.