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21-Way NVIDIA Fermi/Kepler/Maxwell/Pascal OpenCL GPU Comparison

The older cards wouldn't run the SHOC FFT SP benchmark, but for those curious about the single-precision FFT performance, here's a look.

The results don't come out as a huge surprise, but part of the motive for posting this fresh comparison is for offering some fresh reference results if you want to compare your own system's OpenCL GPGPU abilities to the tests found in this article.