Amphenol SF-NJAAK60001-001M 1m (3.3') 400G QSFP112 DAC Cable - 400-Gigabit Ethernet Direct Attach QSFP-112G-PAM4 Cable (26-AWG Flex-Sleeve) - QSFP112 AI Stacking Cable (OEM PN: NJAAK6-0001)

Buy Amphenol 1m (3.3') 400G QSFP112 DAC Cables Now for your Desktop AI and GPU Cluster Supercomputer Needs!  Our 400GBASE-CR4 (400-Gigabit Ethernet) 802.3by/802.3bs, RoCE and NDR InfiniBand qualified passive direct attach copper (DAC) cables provide next generation performance by combining four SFP112 channels, each operating at speeds of up to 100.0 Gbps (PAM4-112G), into one affordable standard-sized 38-position QSFP connector package (QSFP112); capable of combined speeds in excess of 400.0 Gigabits per second.

The Amphenol Cables on Demand 26 AWG Flex-Sleeve SF-NJAAK60001-001M 400G QSFP112 DAC Cable is 100% identical to the Amphenol NJAAK6-0001 QSFP112 DAC Cable for usage with interconnecting (stacking) two GB10-based desktop AI supercomputer systems (DGX Spark, etc.) via any one of their native QSFP112 (ConnectX-7) rated ports (1 cable needed), stacking two GB300-based desktop enterprise AI systems (DGX Station, etc.) via both of their native QSFP112 (ConnectX-8) rated ports (2 cables needed), or for linking these systems directly to next-generation AI and Enterprise Datacenter switches.

Note that a limitation to the PCIe Gen5 bus speed of the Grace Blackwell GB10 (i.e. DGX Spark) only permits 400G-rated QSFP112 stacking cables to run at half-speed (200G).  Regardless, the GB10's CX7 NIC always requires 400G QSFP112 rated cables, regardless of whether the platform can actually utilize the full 400G I/O bandwidth. This is why slower 200G-rated QSFP56 DAC Cables will NOT work reliably as a substitute, they're not CX7 compliant.  Grace Blackwell GB300 systems (i.e. DGX Station) use a faster PCIe Gen6 CX8 NIC and thus operate at the full 400G speed per cable (800G total speed with 2-cable stacking).

Our QSFP112 DAC Cables integrate a newly upgraded 38-position “board-as-connector” design with enhanced EMI spring fingers and zinc die-cast backshells for superior EMI resistance, minimal insertion loss, and improved cross-talk performance. Featuring our exclusive 20 GHz "flat-response" rated Amphenol Spectra-Strip SKEWCLEAR® EXD Extended Distance Series 8-pair wire technology, optimized for 112G/lane protocol applications including 400G Ethernet, RDMA over Converged Ethernet (RoCE) and InfiniBand.

Our unique flexible 26 AWG Flex-Sleeve design forgoes the typical route of molding all 8 wire pairs into a single molded PVC cable jacket.  Instead, four thinner molded 2-pair wire cables, the same as those used in SFP DAC Cables, are encased in a nylon braided cable sleeve, offering superior bend characteristics in tight server rack installations.  Each 1m (3.3-ft) length QSFP112 Direct Attach Copper (DAC) Cable goes through a rigorous assembly and test procedure aimed at eliminating unnecessary signal loss. Our cables are fully compliant to the QSFP112 MSA for guaranteed compatibility with all QSFP112 ports and reverse compatibility with QSFP+ / QSFP28 / QSFP56 ports.