The problem is that after I burn the BIOS of HD 6970, I try to restart my computer to apply the changes, and it simply doesn't load. Does it mean the burning did not succeed?
In order for the computer to start properly, I need to move the switch back and only then it works. In other words, my card with BIOS OF HD 6970 makes my computer fail to turn on, but only with original BIOS of HD 6950.