Not to be outdone by PowerColor, ASUS today also introduced its AMD HD 6990 card in the ASUS HD 6990. Asus also added its own version of overclocking for the HD 6990 via its own "Voltage Tweak" technology, pushing the board to 1.245 GHz, which is just slightly lower than the PowerColor board. By default the ASUS EAH6990/3DI4S/4GD5 churns at 830 MHz, which is the same as the PowerColor card. And like Powercolor, the Asus board comes with 4 GB of video memory and quad mini-DisplayPort connections. One DVI port is also provided.
Check out this video that benchmarks the bandwidth of the AMD HD 6990 in the 3D Mark 11 extreme test