"Just recently we were given some exciting news. We found out that it was possible to flash the HD 6950 with a HD 6970 BIOS and in turn make your $299 HD 6950 a $369 HD 6970, and really we don't have to tell you how cool that would be.
So we grabbed our closest HD 6950 to us which was a Sapphire and proceeded to flash it with a Sapphire HD 6970 BIOS. Thanks to our friends at TechPowerUp, we used WINFLASH, a Windows based program that gives you the ability to flash and save the BIOS of supported video cards."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips