For years, AMD has been offering "Black Edition" processors that cater both to the consumer who wants the best AMD has to offer, and overclockers who want as much flexibility as possible. The reason is unlocked ratios and multipliers, something that on the Intel side required expensive "Extreme Edition" processors.

Given that Intel has been on top of the processor game for years now, it's difficult to say that the company has finally caught up in this regard, but it has. There's no fancy naming scheme here, though... simply a "K" at the end of the model number is all you need to look for, or alternatively, the word "Unlocked" on the box.