Sapphire has now officially launched its new HD 7950 Mac Edition graphics card designed to be used with Mac Pro desktop systems. From Fudzilla:

The new Sapphire HD 7950 Mac Edition, based on AMD's GCN architecture, will bring a new level of graphics perfomance improvement to Mac Pro users in a wide range of applications including gaming, audio or video editing and content creation. According to Sapphire, the HD 7950 Mac Edition will bring over 200 percent improvement in games, up to 30 percent in general benchmarks and up to 300 percent in graphics intensive benchmarks when compared to the Nvidia 8800GT which is commonly used in Mac Pro systems.

Although there are no precise details regarding the clocks, Sapphire noted that the card comes with 3GB of GDDR5 memory and delivers up to 2.87 TFLOPS of single precision compute power as well as hardware support for Open GL 4.2, Open CL 1.2 and AMD HD3D tech and APP acceleration. It also comes with all advanced post-processing and scaling operations, courtesy of AMD GCN architecture, including de-blocking de-noising, automatic de-interlacing, Mosquito noise reduction and edge enhancement as well as advanced image quality enhancement technology, such as adaptive anti-aliasing and 16x angle independent anisotropic texture filtering.

 Sapphire launches HD 7950 Mac Edition graphics card