Last night I wanted to flash my bios back from 0603 bios to the 501 bios I had much more success with. I called tech support to have them help me do it. As it turns out, the bios cant flash an old bios. The older bios has to be be flashed using windows, with asus update. There is an option there to select bios downgradable. So I downloaded the bios, and tried to flash it, making sure to boot at stock settings first. Long story short, it didnt work. It cleared the bios, but never flashed it. They then had me reboot, as asus update no longer detected an asus bios. When I tried to boot, it just shut down and started up repeatedly over and over. With tech support on the line, they advised me to do a cmos clear (which I would have done myself anyways), and it as still a no go. He sent me over to the RMA department, and I had to get another RMA for this board. Unfortunately they had none in stock, so I have to send mine back to get it repaired. Not the happiest camper there ever was right now