Is there any way to restore it back to normal. I've saved PC bios before flash. If I put an additional HD5770 in first slot, and this HD4870 into second will I be able to boot DOS ? I will take power for HD5770 from molex to PCI-Express power converter and HD4870 directly from board. The current state is that it chimes and chimes trying to start the EFI on the card.