Lenovo 3m Mellanox QSFP Passive DAC InfiniBand/fibre optic cable Black, Blue

Product Overview

AI-generated summary

This is a pretty niche item, and the price makes it only reasonable if you’re already in the “InfiniBand world” and you know exactly what you need. A passive QSFP DAC is the kind of cable that just works when it’s used in the right port types and within the intended reach—no fuss, lower latency than going optical, and generally better value than bespoke optics. At ~£121 ex-VAT, you’re paying for convenience and compatibility more than “bulk copper value,” so it’s not the thing you buy when you’re guessing.

Who should buy: teams running InfiniBand networks (often HPC, storage, high-performance switching) that need short-reach connections between matched switches/HCAs, and want a clean, power-saving, straightforward link without going optical. Who shouldn’t: anyone who’s not certain about InfiniBand vs Ethernet/QSFP compatibility, or who needs longer runs—passive DACs can get flaky if you drift outside what the network gear expects, and swapping later is annoying and wasteful. If you’ve got the vendor part numbers/port guidance nailed down, it’s good value; if you don’t, I’d pause and verify first before ordering.