AMD planned to retake the notebook video lead Tuesday with the release of the Radeon HD 6990M. The chipset is in many ways equivalent to the desktop 6870 and has a full 1,120 stream processors (visual effects cores) at 715MHz along with 900MHz actual (3.6GHz effective) GDDR5 memory. The performance is enough to make it about 17 percent faster than the 6970M and 25 percent faster than NVIDIA's GeForce GTX 580M, AMD estiamtes.
