Radeon HD 6990 review

For many weeks now the Radeon HD 6990 has been a product of much discussion. Nobody really could confirm what GPU's would be used, how much graphics memory it would get and so on. Well, rest assured. AMD stuck two Cayman XT GPUs (R6970) onto the PCB and allows them to be clock at R6970 speeds as well, in fact you'll get options in clock-frequencies and TDP with the help of a small micro-switch seated on the card, each leads to a vBIOS, one with more acceptable TDPs and the other enabled a higher clock frequency mode. Now I've stated it, Cayman XT GPUs, that means the full shader processor count inside that GPU is available, that sums up towards 3072 shader processors.
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