Sorry for the question, but I just bought two Mellanox ConnectX-3 CX353A-FCBT FDR Infiniband + 40 GbE Single QSFP+ adapters. I've been running several ConnectX-2 adapters for some time, and have quite a few QSFP-QSFP cables available - including some active fiber cables. I'm afraid I know what the answer to this question is, but will my QSFP cables work with the QSFP+ ConnectX-3 cards? Or will I have to buy some new cables?
As these cards are FDR versus QDR you would need a cable that supports the FDR speed to achieve proper 56Gb