AMD/ATI GPUs happen to be a lot faster for hashing than NVIDIA's. Partly because of a key design difference, and partly because they happen to have a fast 32-bi

AMD/ATI GPUs happen to be a lot faster for hashing than NVIDIA's. Partly because of a key design difference, and partly because they happen to have a fast 32-bit right rotate instruction. Details here: https://en.bitcoin.it/wiki/Why_a_GPU_mines_faster_than_a_CPU#Why_are_AMD_GPUs_faster_than_Nvidia_GPUs.3F https://en.bitcoin.it/wiki/Why_a_GPU_mines_faster_than_a_CPU...