: This is the fastest and most reliable software method.
It is a regulatory and industry specification marking used by Intel across many different desktop boards. Because of this, searching for it directly can be confusing, but don't worry—here is how to identify what you actually have and what the common specs look like. Why "21 B6 E1 E2" Isn't Your Model Number intel desktop board 21 b6 e1 e2 specification link
Based on various retail and community sources, boards bearing this marking generally feature the following: : This is the fastest and most reliable software method
A related model guide can be found on Intel's support archives . intel desktop board 21 b6 e1 e2 specification link