I wish I could go to the manufacturer but it's a Abit ix38 quad gt, I updated the bios a couple of years ago when using a NVidia 6800gs which was fine but now I want to use a sapphire radeon 4870 x2, it fires up and everything seems to work except I don't get anything on my monitor and have read I need to backdate my bios to version 10 or 11