I had that in the beginning, too. Be sure that "InjectIntel" is NOT activated. This kept my hackintosh from booting. Have not fixed that one yet myself. Don't have any better solution to that, either. Right now. I'm a rookie myself
The EFI worked for me,... and I have the same mainboard and no graphics,... Check if all the Kexts are installed correctly. Keep us updated. Thanks.