{"product_id":"amphenol-qsfp112-cable-0-5m-dgx-spark","title":"Amphenol QSFP112 Cable 0.5m for Linking Two DGX Spark Systems","description":"\u003csection class=\"phd-intro\"\u003e\n  \u003cdiv\u003e\n\u003cp class=\"phd-eyebrow\"\u003eDGX Spark accessory \/ ConnectX-7 networking\u003c\/p\u003e\n\u003ch2\u003eLink two DGX Spark systems directly at up to 200Gb\/s.\u003c\/h2\u003e\n\u003c\/div\u003e\n  \u003cdiv\u003e\n\u003cp\u003eThis 0.5m Amphenol QSFP112 passive copper cable is approved by NVIDIA for linking the ConnectX-7 QSFP ports of two DGX Spark systems over a direct Ethernet link. NVIDIA quotes support for AI models of up to 405 billion parameters on two linked DGX Spark systems.\u003c\/p\u003e\n\u003cp\u003eOther GB10 systems, such as the Dell Pro Max with GB10, use the same type of port, but their makers have not listed this part, and linking systems from different brands is not documented.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003cnav class=\"phd-jump-links\" aria-label=\"Product information\"\u003e\n  \u003ca href=\"#hardware-components\"\u003eProduct details\u003c\/a\u003e\n  \u003ca href=\"#hardware-specification\"\u003eTechnical specification\u003c\/a\u003e\n  \u003ca href=\"#hardware-included\"\u003eIncluded and required\u003c\/a\u003e\n  \u003ca href=\"#hardware-questions\"\u003eBefore you order\u003c\/a\u003e\n\u003c\/nav\u003e\n\u003cdiv class=\"phd-metrics\" aria-label=\"Key specifications\"\u003e\n  \u003cdiv\u003e\n\u003cstrong\u003e200Gb\/s\u003c\/strong\u003e\u003cspan\u003eMaximum link speed per port\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv\u003e\n\u003cstrong\u003e0.5m\u003c\/strong\u003e\u003cspan\u003eCable length\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv\u003e\n\u003cstrong\u003eQSFP112\u003c\/strong\u003e\u003cspan\u003eConnector at both ends\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv\u003e\n\u003cstrong\u003ePassive\u003c\/strong\u003e\u003cspan\u003eCopper cable, no power needed\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003csection class=\"phd-components\" id=\"hardware-components\"\u003e\n  \u003ch2\u003eTwo systems, one cable, no switch.\u003c\/h2\u003e\n  \u003cdiv class=\"phd-features\"\u003e\n    \u003carticle\u003e\u003ch3\u003eApproved by NVIDIA for DGX Spark\u003c\/h3\u003e\n\u003cp\u003eNVIDIA's DGX Spark user guide lists the approved cables as the Amphenol NJAAKK-N911 (0.4m), its 0.5m version NJAAKK0006 (this cable) and a Luxshare 0.4m cable. The cable is rated for 400G; each DGX Spark QSFP port runs at up to 200Gb\/s, so the link runs at up to 200Gb\/s.\u003c\/p\u003e\u003c\/article\u003e\n    \u003carticle\u003e\u003ch3\u003eDirect links between two or three systems\u003c\/h3\u003e\n\u003cp\u003eOne cable links two DGX Spark systems directly, and three connect in a ring with three cables. The QSFP ports run Ethernet only, with RDMA over Converged Ethernet (RoCE) for the software that spreads work across the systems. Four systems need a switch.\u003c\/p\u003e\u003c\/article\u003e\n    \u003carticle\u003e\u003ch3\u003eNVIDIA's setup guides\u003c\/h3\u003e\n\u003cp\u003eNVIDIA's DGX Spark user guide shows how to fit the cable: pull tab facing up, without force. NVIDIA's \"Connect Two Sparks\" playbook then covers the same user name on both systems, the same physical port on each unit, IP addressing and SSH, and the separate \"NCCL for Multiple Sparks\" playbook covers NCCL. On DGX Spark, NVIDIA Sync's Cluster Assistant offers a guided alternative for the network setup; it needs the April 2026 system software release or later.\u003c\/p\u003e\u003c\/article\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003caside class=\"phd-note\"\u003e\u003ch3\u003eUsing another GB10 brand?\u003c\/h3\u003e\n\u003cp\u003eDell, HP, Lenovo, ASUS, Acer, MSI and Gigabyte GB10 systems use ConnectX-7 QSFP ports at up to 200Gb\/s and document linking two units with a QSFP cable, but none of them lists this Amphenol part, and HP, Lenovo and Gigabyte sell their own cables. If you need a part your system's maker supports, check with them before ordering.\u003c\/p\u003e\u003c\/aside\u003e\n\u003csection class=\"phd-specs\" id=\"hardware-specification\"\u003e\n  \u003cdiv class=\"phd-section-heading\"\u003e\n\u003ch2\u003eTechnical specification\u003c\/h2\u003e\n\u003cp\u003eSpecifications for one cable\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003ctable\u003e\n\u003ccaption\u003e01 \/ Cable\u003c\/caption\u003e\n\u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eManufacturer part number\u003c\/th\u003e\n\u003ctd\u003eAmphenol NJAAKK-0006 (written NJAAKK0006 by NVIDIA); distributor part SF-NJAAKK0006-000.5M\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eLength\u003c\/th\u003e\n\u003ctd\u003e0.5m (500mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eConnectors\u003c\/th\u003e\n\u003ctd\u003eQSFP112 to QSFP112, straight\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eType\u003c\/th\u003e\n\u003ctd\u003ePassive copper direct-attach cable, 32AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eRating\u003c\/th\u003e\n\u003ctd\u003e4 lanes at 112Gb\/s (400GBASE-CR4)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003ePower\u003c\/th\u003e\n\u003ctd\u003eNone required (passive)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n  \u003ctable\u003e\n\u003ccaption\u003e02 \/ On DGX Spark\u003c\/caption\u003e\n\u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eLink speed\u003c\/th\u003e\n\u003ctd\u003eUp to 200Gb\/s per QSFP port\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eNetwork type\u003c\/th\u003e\n\u003ctd\u003eEthernet, with RoCE\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eDirect connections\u003c\/th\u003e\n\u003ctd\u003eTwo systems with one cable; three in a ring with three cables\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eFour systems\u003c\/th\u003e\n\u003ctd\u003eA QSFP switch with at least four 200Gb\/s QSFP56-DD ports (NVIDIA's requirement), plus one switch-compatible cable per system; check the switch maker's supported cables and the length you need\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eOrientation\u003c\/th\u003e\n\u003ctd\u003ePull tab facing up (NVIDIA); do not force the connector. On other GB10 systems, follow the maker's guide\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n  \u003cp class=\"phd-footnote\"\u003eThe cable's 400G rating is higher than the DGX Spark port speed; the link between two systems runs at up to 200Gb\/s.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"phd-supply\" id=\"hardware-included\"\u003e\n  \u003cdiv\u003e\n\u003cp class=\"phd-eyebrow\"\u003eIncluded\u003c\/p\u003e\n\u003ch2\u003eOne 0.5m QSFP112 cable.\u003c\/h2\u003e\n\u003cp\u003eOne Amphenol NJAAKK-0006 QSFP112 passive copper cable, 0.5m. No software, adapters or systems are included.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv\u003e\n\u003cp class=\"phd-eyebrow\"\u003ePlan your setup\u003c\/p\u003e\n\u003ch2\u003eWhat you'll need.\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTwo DGX Spark systems, or three systems and three cables for a ring.\u003c\/li\u003e\n\u003cli\u003eCurrent system software updates on each unit, the same user name on both and administrator access.\u003c\/li\u003e\n\u003cli\u003eNetwork setup following NVIDIA's \"Connect Two Sparks\" playbook, then NCCL following NVIDIA's \"NCCL for Multiple Sparks\" playbook. On DGX Spark, NVIDIA Sync's Cluster Assistant is a guided alternative for the network setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"phd-faq\" id=\"hardware-questions\" aria-label=\"Before you order\"\u003e\n  \u003cdetails\u003e\u003csummary\u003eWill it work with a Dell Pro Max with GB10?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eDell's guide asks for a ConnectX-7 QSFP 200G cable between the two systems but does not name a part number or length, and Dell has not listed this Amphenol cable. NVIDIA approves this cable for DGX Spark, and the Dell Pro Max with GB10 uses the same type of ConnectX-7 QSFP port. If you need a Dell-supported part, check with Dell before ordering.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs the link 400Gb\/s?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eNo. The cable is rated for 400G, but each DGX Spark QSFP port runs at up to 200Gb\/s, so the link between two systems runs at up to 200Gb\/s.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I connect more than two systems?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eThree DGX Spark systems can connect directly in a ring using three cables. Four systems need a QSFP switch with at least four 200Gb\/s QSFP56-DD ports and switch-compatible cables; check the switch maker's supported cables and the length you need.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhich port do I use?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eEither QSFP port works, but NVIDIA's setup guide assumes the same physical port on each unit. On DGX Spark, insert the cable with its pull tab facing up and do not force it; pull the tab to remove it.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eManufacturer documentation\u003c\/summary\u003e\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/docs.nvidia.com\/dgx\/dgx-spark\/spark-clustering.html\"\u003eNVIDIA DGX Spark user guide: ConnectX-7 networking and approved cables\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/build.nvidia.com\/spark\/connect-two-sparks\"\u003eNVIDIA playbook: Connect Two Sparks\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.amphenol-cs.com\/product\/njaakk0006.html\"\u003eAmphenol NJAAKK-0006 QSFP112 cable assembly\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.dell.com\/support\/kbdoc\/en-gb\/000400252\/how-to-cluster-two-dell-pro-max-with-gb10-systems-fcm1253\"\u003eDell: how to cluster two Dell Pro Max with GB10 systems\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/section\u003e\n","brand":"Amphenol","offers":[{"title":"Default Title","offer_id":60995488973134,"sku":"NJAAKK-0006","price":99.95,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1078\/0213\/2814\/files\/cx7-cable-orientation.png?v=1790672041","url":"https:\/\/shop.perceptasolutions.com\/products\/amphenol-qsfp112-cable-0-5m-dgx-spark","provider":"Percepta Solutions","version":"1.0","type":"link"}