Shortly after the launch of the Radeon HD 7870, the only video cards available were clones of the reference design. Now that we're past the initial launch period, new models of the 7870 are now available which deviate from the standard. The model we're looking at today is called the Double Black Diamond. A step up from the vanilla 7870, the Double Black Diamond comes with an overclock of 50MHz to the GPU and 25MHz (200MHz GDDR5 effective).



Link: circuitREMIX