NVIDIA Mellanox® MCP1OPT-NWEAU2 — 400GbE OSFP Passive Copper DAC Cable, 1.4m
Technical Identity
The NVIDIA Mellanox® MCP1OPT-NWEAU2 is a 1.4m LinkX passive copper Direct Attach Cable (DAC) for 400 Gigabit Ethernet (400GbE) single-port deployments. Each end terminates in a flat-top OSFP connector (single-port 400Gb/s) with 26 AWG twin-axial copper conductors. As a passive copper assembly, the cable contains no signal-conditioning electronics and draws no port power — it is a fixed-length, 1-to-1 OSFP-to-OSFP interconnect optimized for short-reach intra-rack links. Condition: Refurbished Grade A, bench-tested by T.E.S IT-SOLUTIONS.
Specifications
Brand: NVIDIA Mellanox
Model / MPN: MCP1OPT-NWEAU2
Product family: NVIDIA LinkX Passive Copper DAC
Product type: Passive Copper Direct Attach Cable (DAC)
Configuration: 1-to-1 cable assembly (single-port OSFP to single-port OSFP)
Protocol / speed: 400 Gigabit Ethernet (400GbE), single-port
Connectors: OSFP on each end (flat-top, 400Gb/s single-port)
Length: 1.4m
Wire gauge: 26 AWG
Signal conditioning: None (passive)
Power draw: 0 W (no port power required)
Form factor: Hot-pluggable OSFP MSA
Latency: Sub-nanosecond per cable (passive copper)
Condition: Refurbished Grade A
What This Is NOT
NOT an AOC. No optics, no internal lasers — passive twin-axial copper only.
NOT a transceiver. Fixed-length cable assembly; the OSFP ends are not field-replaceable optics.
NOT a splitter or breakout. 1-to-1 OSFP-to-OSFP only — does not break out into 2×200G or 4×100G.
NOT a QSFP, QSFP28, QSFP56, or QSFP-DD cable. Both ends are OSFP — does not fit QSFP-class cages without an MSA-compliant adapter.
NOT an InfiniBand NDR cable. Although physically OSFP, this MPN is the Ethernet-mode variant — for NDR InfiniBand use the matching MCP4Y10-Nxxx / MCP4Y10-Hxxx series.
NOT bundled with adapters, transceivers, or rail kits — sold standalone.
Compatibility & Constraints
Reach: Fixed 1.4m — intra-rack short-reach (server-to-ToR within the same rack).
Switch side (pairs with): NVIDIA Spectrum-4 SN5400 / SN5600 series 400GbE Ethernet switches with OSFP cages.
Adapter side (pairs with): NVIDIA ConnectX-7 (MCX75xxxxx-NEAT / -NEAB and Ethernet-mode SKUs) on OSFP, configured for 400GbE Ethernet mode.
Protocol mode: 400GbE Ethernet — confirm switch and adapter port-mode is set to Ethernet (not InfiniBand) before deployment.
Power: Passive — no external supply or port budget required.
MSA compliance: OSFP MSA — interoperable with OSFP cages on other vendors only where 400GbE Ethernet port-mode is supported. Always verify firmware, driver, and port-mode before deploying.
Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MCP1OPT-NWEAU2?
The MCP1OPT-NWEAU2 is a 1.4m NVIDIA LinkX passive copper DAC cable for 400GbE Ethernet, with OSFP connectors on both ends and 26 AWG twin-axial copper conductors. It is a single-port OSFP-to-OSFP, 1-to-1 fixed-length assembly with no signal conditioning.
Q. Is this cable Ethernet, InfiniBand, or both?
The MCP1OPT-NWEAU2 is the 400GbE Ethernet-mode variant of the NVIDIA LinkX OSFP passive copper DAC family. For NDR (400Gb/s) InfiniBand fabrics, use the NDR-rated MCP4Y10-N / MCP4Y10-H series cables instead. Always set the connected switch and adapter port mode to Ethernet before linking the cable.
Q. What hardware does the MCP1OPT-NWEAU2 pair with?
Switch side: NVIDIA Spectrum-4 (SN5400 / SN5600) 400GbE Ethernet switches with OSFP ports. Adapter side: NVIDIA ConnectX-7 (MCX75x series) Ethernet-mode adapters on OSFP cages. The cable is OSFP MSA-compliant and will physically fit any 400GbE OSFP cage where 400GbE Ethernet port-mode is supported, but NVIDIA-to-NVIDIA pairing is recommended for guaranteed performance and qualification.
Q. Why passive copper and not AOC or optical at 1.4m?
At 1.4m, passive copper is the lowest-cost, lowest-latency, lowest-power option. No port power is consumed, sub-nanosecond cable latency, and no laser MTBF concerns. AOCs and optical transceivers are only required when reach exceeds the passive copper budget (typically >3m at 400G).
Q. Where is the MCP1OPT-NWEAU2 typically deployed?
1.4m is an intra-rack length: server / GPU node uplinks to the Top-of-Rack switch in the same rack, leaf-to-leaf or leaf-to-spine inside a single rack, and AI / HPC compute fabric east-west links where the endpoints are physically adjacent. For inter-rack or row-to-row reach, use a longer DAC or an AOC.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished Grade A. Every unit is bench-tested by T.E.S IT-SOLUTIONS: link establishment validated against an NVIDIA reference platform, EEPROM / vendor-data check, and full cosmetic inspection. Ships from EU stock in professional anti-static packaging with global B2B shipping.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based NVIDIA Mellanox specialist serving HPC, AI, and enterprise data-center procurement teams since 2007. We focus exclusively on the NVIDIA networking portfolio — every cable, transceiver, adapter, and switch we ship is identified by MPN, NVIDIA P/N, ASIC generation, and port-mode before it leaves our bench. Free pre-sale compatibility guidance for switch / adapter / cable pairing, multi-currency B2B invoicing, EU stock with worldwide express shipping, and direct technical contact with our networking engineers — not a call-center.