Lenovo 1m Mellanox QSFP Passive DAC InfiniBand/fibre optic cable Black, Blue

Product Overview

AI-generated summary

If you’re running an InfiniBand fabric and you already know you need a **passive QSFP DAC** between two compatible Mellanox/InfiniBand ports, this is the kind of cable that just *works*. The main reason to buy a known-good Lenovo-branded DAC is reliability: fewer headaches than “mystery brand” copper, predictable signal integrity at short reaches, and it’ll be one less variable to troubleshoot when everything else is stable. At **£87.16 ex-VAT for a 1m lead**, it’s not a bargain, but it’s in the sensible range for enterprise optics-adjacent interconnects where you’re paying for guaranteed compatibility.

That said, I wouldn’t touch it unless you’re confident about the **exact InfiniBand/QSFP passive DAC use case**. If you’re trying to use it for Ethernet or you’re not sure your ports/cabling requirements match (especially active vs passive, or different IB generations), it’s easy to end up with an expensive “no link” experience. Also, if your run isn’t truly short, passive DACs stop making sense fast—stretch the distance and you’ll either force upgrades to active cables or end up troubleshooting link stability. Bottom line: **buy it if you’re doing short, known-good InfiniBand hops**; skip it if you’re unsure what you’re connecting or how far the run is.