News — ConnectX-7
NVIDIA DGX Spark Stacking Cable NJAAKK-N911: What It Does, Who Needs It, and How It Differs from the DAC
If you have been researching how to connect two NVIDIA DGX Spark systems, you have probably seen several cable part numbers referenced: the Amphenol NJAAKK-N911, the Luxshare LMTQF022-SD-R, and the Mellanox MCP1650-V00AE30. This article explains what the NJAAKK-N911 is, how the DGX Spark's networking actually works, and how these cables relate to one another. Short answer: what it is and what it costs NJAAKK-N911 is $187 at Resilient Tec — or $84 for the 200G alternative The NJAAKK-N911 is one of NVIDIA’s two approved DGX Spark cables: a 0.5 m Amphenol QSFP112 passive DAC that runs at the Spark’s 200...
How to Connect Two NVIDIA DGX Spark Systems: The Cable You Need and Why
This is where most people get stuck. NVIDIA's DGX Spark documentation names two approved cables for connecting Sparks: the Amphenol NJAAKK-N911 and the Luxshare LMTQF022-SD-R (both QSFP112 passive DAC). These are sometimes listed under NVIDIA's own shorthand, the QSFP/CX7 cable. Because the Spark's ConnectX-7 QSFP ports run at up to 200 Gb/s, a 200G QSFP56 DAC also works well in practice. A viable, tried-and-tested lower-cost option we stock and that our customers use successfully is: Short answer: yes One 0.5 m QSFP-to-QSFP passive DAC connects two DGX Sparks — $84 or $187 at Resilient Tec NVIDIA validates the Amphenol NJAAKK-N911...