The stream processors can be used with DirectX 11, OpenGL 4.1, DirectCompute 11 and OpenCL.
The tessellation performance should be improved (like the desktop 6800 series) with the new cards. Therefore, the number of shaders is not comparable to the 1D cores of current Nvidia GPUs. The 480 stream processors should be still based on the "old" 5D architecture similar to the 5000 series. The architecture is based on the Northern Islands generation, manufactured in 40nm. It is based on the same chip as the Radeon HD 6650M, but has a lower core clock of 450 - 550 MHz. The memory interface is 128 bit wide, but only supports DDR3.
The AMD Radeon HD 7650M (sometimes also called AMD Mobility Radeon HD 7650) is a DirectX11 middle class graphics card for laptops.
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