i am also wondering the same thing..i am putting my mb and computer together tomorrow...i heard the update breaks speedstep...dont even know what it is but i really wanna know how to check if its working or not so i can check after the update..
1. New CPU was released
2. Memory compatibility issues + new RAM models are released
3. Remember when the new 2+TB HDD have been released? New BIOS was needed.
4. New hardware support added.
5. Or if u can benefit from changes in the change log.
BIOS updates are always risky for various reasons.