http://www.semiaccurate.com/2010/12/...second-switch/

Charlie article. Better late than never, and boy he delivers. Take it for what its worth.
The secret of the AMD 6900's second switch
That's total bull. I just red the offical review:

DUAL BIOS option for safer end user updates:
-Setting 1 unprotected for user updates
-Setting 2 protected as factory default