Review on 🔌 40G QSFP+ DAC Cable - High-Speed 40GBASE-CR4 Copper Twinax QSFP Cable with 3M Axial Technology for Cisco, Meraki, Mikrotik by Melvin Balamani

The description states that it can operate at "up to 56 Gbps" when in fact it can only operate at up to 40 Gbps (http://www.mellanox.com/page /cables; MC2206130-003 may only work with FDR10, which is 40 GB/s) . Otherwise it's a decent cable. --- Update --- Just wanted to give an update after doing some more testing. These cables only marginally underperformed our AOC 56Gb/s cables, similar to 10Gtek 40G QSFP+ AOC for IBM/Mellanox Active Optical Cable, 3 meters. We achieved 22.8 Gb/s IPoIB with our AOC cables with iperf and 22.3 Gb/s with these copper cables. If you don't want to spend extra money on optical cables and don't need to travel long distances, this is a pretty good cable.