I have a system with 2 K20x Kepler cards. I tried to replicated the 2x scale using 2 cards + cublasXT for sgemm, dgemm and zgemm. I was not able to replicate the 2x for sgemm or dgemm, the score with 1 or 2 cards is about the same. I was able about 2x scaling only with zgemm.
Any suggestions?
regards,