This page is a stub. Help by expanding it. An OpenCL miner is a bitcoin miner that uses the OpenCL framework to perform the hashing computations. When used with a modern GPU, this can produce hash rates orders of magnitude higher than what can be achieved with a CPU. Hashing on a GPU requires an OpenCL or CUDA compatible graphics card.
See the Mining Hardware Comparison page for detailed statistics on the hash rates that can be achieved with various hardware.