XFX 5670 Eyefinity, Flashing Screen

[DjiXas]

Hello, I have XFX 5670 GDDR3 (HD-567X-ZAF3 XFX) with DisplayPort and Sapphire active DP > DVI cable. When I plug it in, screen starts flashing every second.

I have read that others solved this by flashing their bios, but I can't find any for 5670 GDDR3!

Does anyone know how much voltage is raised and could tell me how can I do that by myself?

 

[DjiXas]

Downloaded Radeon BIOS Editor but have no idea which voltage to raise and by how much for GDDR3.