Lenovo 0.75m Mellanox QSFP Passive DAC InfiniBand/fibre optic cable Black, Blue

Product Overview

AI-generated summary

If you’re running a true InfiniBand fabric and you know you need a passive QSFP DAC at roughly that short reach, this is the kind of cable that just gets out of the way. Passive DACs are usually the value-for-money choice for rack-to-rack links because you don’t pay for optics and you avoid a lot of fuss around cleaning, transceivers, and light-path issues. For the right environment, £77 ex-VAT for a 0.75m lead is pretty reasonable.

That said, I wouldn’t buy it “just because it’s InfiniBand” or for anything uncertain. Passive DACs are picky about compatibility with the exact transceivers/switch ports and the module generation; if your gear expects a different QSFP flavour or expects optical cabling, you’ll waste time fast. Also, if you’re ever tempted to use it outside a short, controlled path (or you need reach beyond a rack), this won’t help—go optical instead. Bottom line: buy this only if you’ve already validated your switch/transceiver pairing and you’re making a short internal connection; otherwise it’s not a low-risk purchase.