NVIDIA Mellanox MC2206125-006 QSFP+ to QSFP+ Passive Copper Cable, 6m: This is a 6-meter passive copper Direct Attach Cable (DAC) engineered for InfiniBand QDR (40Gb/s) point-to-point links between QSFP+ ports. This is a passive copper assembly with no active electronics or optics inside the connector ends. This is not an active optical cable (AOC) and does not include a detachable transceiver. This is a refurbished unit.
Engineering Context
The MC2206125-006 is a fully integrated factory-terminated copper assembly using twin-axial wires. Passive copper consumes essentially no port power on either end (typically less than 0.1W) compared to AOC or transceiver-based links. There is zero serialization latency added by the cable itself. At 6 meters, this length sits comfortably within the typical passive QDR copper reach envelope and works on most QDR-class HCAs and switches without special tuning.
 
Deployment & Use Cases
HPC compute cluster interconnects using ConnectX-2 or ConnectX-3 QDR HCAs. Top-of-rack to mid-row InfiniBand fabric links for storage and compute. Lab and integration environments needing low-cost, low-latency QDR copper. Cost-effective replacement for AOC where ≤7m reach is sufficient.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MC2206125-006
Form Factor: QSFP+ to QSFP+ (Point-to-Point)
Cable Type: Passive Copper DAC
Data Rate: 40Gb/s InfiniBand QDR (4x 10Gb/s)
Length: 6m
Power per End: Passive (no active electronics)
Latency: Cable adds no serialization latency
Protocol: InfiniBand QDR
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Designed for InfiniBand QDR fabrics on QSFP+ ports of Mellanox ConnectX-2/ConnectX-3 HCAs and SwitchX/IS5000-series QDR switches. Will negotiate down to lower IB rates (DDR, SDR) where supported by both endpoints. 40GbE Ethernet operation is not guaranteed and depends on switch/NIC SerDes support for passive copper at this length — verify before deploying for Ethernet. Not an active cable: do not deploy on platforms requiring active signal regeneration. Fixed 6m length, not breakout-capable.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS link-tests every cable for QDR rate negotiation, BER, and connector integrity before shipment. 1–3 business day handling, global shipping, and post-sale technical support. Visit tes-itsolutions.com.