I managed to flash my Dell mezzanine cards with firmware version 2.10.720, and I wrote an article about it. RDMA is now enabled, and maximum throughput of an SMB share, measured using IOMeter, improved from 1,900MB/S to 3,200MB/S. See: Custom Firmware for Mellanox OEM Infiniband Cards - WS2012 RDMAServeTheHome – Server and Workstation Reviews
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