True, but they don't offer a machine that can run OpenCL well. On my current Mac Pro (6-Core Xeon 3.33Ghz) the CPU runs most of my codes at the same speed as the ATI Radeon 5870. An ATI 7970 would have been a nice (minimal) addition but I really want support for an NVidia Tesla c2070 so I can develop CUDA codes to run on Amazon EC2.