🔌 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) Review

I have used 10g Tek for many installations. I recommend them to all my clients. They were used to install a pair of ms-225s in a wiring closet and they fit perfectly. A month later I have no problems. OEMs take great pride in their cables and charge a fee to put their name on them. 10g tek offers great cables at a great price.

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

Out of 9 cables I found 2 faulty cables (one was shorted internally because my traffic tester restarted and the other has a CRC error). One of the 9 cables also received in a week.

good cable, I use it on 40G, tested with iperf3, it gives me 33-34 GB/s with Mellanox Connex 3 cards (switch in the middle), which in my very acceptable is construction