Review on 🔌 High-Speed 40G QSFP+ DAC Cable for Arista CAB-Q-Q-0.5M Devices: 40GBASE-CR4 Passive Direct Attach Copper Twinax QSFP Cable, 0.5-Meter(1.64ft) by Lawrence George

mellanox.com/page/cables; MC2206130-003 only runs on FDR10 at 40GB/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.