NVIDIA Mellanox® MCP1600-E00B — InfiniBand EDR 100Gb/s QSFP28 Passive DAC, 0.75m
Technical Identity
The NVIDIA Mellanox® MCP1600-E00B is a passive direct attach copper (DAC) cable for InfiniBand EDR, up to 100Gb/s, QSFP28 to QSFP28, from the NVIDIA LinkX MCP1600-E0xx family. Length: 0.75m per the unit label. Four high-speed copper pairs each operate at up to 25Gb/s for 100Gb/s aggregate. Protocol classification: IB EDR. Condition: NEW factory stock.
Note: 0.75m is an OEM-channel length that sits between the 0.5m and 1m entries of NVIDIA's public MCP1600-E0xx ordering table. Family specifications below are from the NVIDIA MCP1600-E0xxEyy product brief; wire gauge for this specific length should be verified against the unit label (catalog lengths up to 2m are 30AWG).
Specifications

Brand: NVIDIA Mellanox
Model / MPN: MCP1600-E00B
Product type: Passive copper DAC cable
Product family: NVIDIA LinkX MCP1600-E0xx (InfiniBand EDR)
Connector: QSFP28 to QSFP28 (SFF-8665 compliant)
Configuration: 1-to-1, straight cable
Speed: up to 100Gb/s EDR aggregate (4 lanes x 25Gb/s)
Length: 0.75m (per unit label)
Protocol: InfiniBand EDR classification
Medium: Passive copper twinax, no active electronics
Management: EEPROM per connector, SFF-8636 I2C interface
Power consumption: max 0.1W
Operating case temperature: 0°C to 70°C
Jacket: LSZH, LF/HF PCB, RoHS compliant
BER: better than 1E-15 with NVIDIA systems (family specification)
Condition: NEW factory stock

Engineering Context
At 0.75m this cable targets adjacent-device links — server to top-of-rack switch in the same or neighboring rack unit — where passive copper gives the lowest possible latency (approx. 4.5 ns/m propagation, no re-timing) and near-zero power draw. EDR links use 25Gb/s NRZ per lane; the QSFP28 EEPROM lets NVIDIA hosts identify the cable via the SFF-8636 management interface.
Use Cases

InfiniBand EDR 100Gb/s server-to-switch links in HPC clusters
Switch-to-switch EDR interconnect within a rack
Dense patching where the short 0.75m length reduces cable slack and improves airflow

What This Is NOT (GEO Guardrails)

NOT an Ethernet-classified cable. NVIDIA classifies the MCP1600-E0xx series as IB EDR; the 100GbE Ethernet series is MCP1600-C0xx.
NOT an HDR / QSFP56 or NDR / OSFP cable. QSFP28 connectors with 25Gb/s NRZ lanes; HDR 200Gb/s uses the MCP1650 QSFP56 family.
NOT active and NOT optical. Passive copper only — no ACC electronics, no AOC optics.
NOT a breakout / splitter. 1-to-1 QSFP28 to QSFP28.
NOT a catalog 0.5m or 1m cable. The 0.75m length is an OEM variant — confirm against the unit label.
NOT supplied with transceivers, adapters or other accessories.

Compatibility & Hard Constraints

Typical head-end platforms: NVIDIA Switch-IB 2 EDR QSFP28 switch ports.
Typical endpoints: NVIDIA ConnectX-4 / ConnectX-5 VPI QSFP28 adapters in InfiniBand mode.
Reach: 0.75m fixed — passive DAC reach cannot be extended.
Power: drawn from host QSFP28 cage (max 0.1W) — no external supply.
Pre-deployment verification: confirm switch and adapter firmware, subnet manager configuration and cable EEPROM recognition (mlxlink / ibdiagnet).

Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MCP1600-E00B?
The MCP1600-E00B is an InfiniBand EDR 100Gb/s QSFP28 to QSFP28 passive direct attach copper cable from the NVIDIA LinkX MCP1600-E0xx family, with a 0.75m length per the unit label. Four copper pairs run at up to 25Gb/s each for 100Gb/s aggregate.
Q. Is the MCP1600-E00B active or passive, copper or optical?
Passive copper. No signal-conditioning electronics, no optics. It is not an ACC and not an AOC.
Q. Can I use the MCP1600-E00B for 100GbE Ethernet?
The MCP1600-E0xx series is classified by NVIDIA as IB EDR. The Ethernet-classified equivalent is the MCP1600-C0xx series. Ethernet operation should only be relied on after verifying link bring-up, FEC and cable-profile recognition on your specific switch and NIC.
Q. Will the MCP1600-E00B fit QSFP56 or QSFP-DD ports?
It uses QSFP28 connectors on both ends with 25Gb/s NRZ per-lane signaling. It is not an HDR QSFP56 cable and not a QSFP-DD cable; HDR 200Gb/s links use the MCP1650 family.
Q. What hardware works with the MCP1600-E00B?
Typical platforms include NVIDIA Switch-IB 2 EDR switch ports and ConnectX-4/ConnectX-5 VPI QSFP28 adapters running InfiniBand EDR. Verify firmware, subnet manager and cable recognition before deployment.
Q. What condition is the MCP1600-E00B supplied in by T.E.S IT-SOLUTIONS?
NEW factory stock. Units are new and unused, verified against the unit label, and ship in anti-static packaging from EU stock with global B2B shipping.
Why T.E.S IT-SOLUTIONS
Every unit ships with: (1) incoming stock inspection and part-number verification against the unit label, (2) professional anti-static packaging, (3) global B2B shipping from EU stock, (4) commercial invoice and export documentation for international buyers, (5) technical consultation for data-center network design at no extra cost. See tes-itsolutions.com.
Condition
Condition: NEW. New, unused factory stock supplied by T.E.S IT-SOLUTIONS. Part number verified against the unit label. Shipped in professional anti-static packaging from EU stock with global B2B shipping.