It has been known since the release of the AMD Radeon HD 6950 and Radeon HD 6970 graphics cards that the two cards were virtually identical. The Radeon HD 6950 and the 6970 are both based on AMD’s Cayman GPU core, having identical specifications except for the cards respective maximum power limit and power connectors. The features that are 'locked' on the AMD Radeon HD 6950 are done so in the GPU’s BIOS  or vBIOS and can be ‘easily’ unlocked making the card the same as a AMD Radeon HD 6970 with the exception of the 8-pin PCIe power connector that doesn't appear to be needed.