NVIDIA Mellanox MC2207128-003 56Gb/s FDR Passive Copper Cable, QSFP-to-QSFP, 3m — Lot of 6: This is a passive copper Direct Attach Cable (DAC) engineered for VPI (Virtual Protocol Interconnect) operation, supporting both InfiniBand FDR (56Gb/s) and 56Gb/s Ethernet on the same cable assembly. The QSFP+ connector form factor is identical on both ends. This is a fixed 3-meter integrated assembly, not a transceiver with a detachable patch cord, and not an active optical cable. This listing is for a Lot of 6 cables in New condition.
Engineering Context
Passive copper DACs deliver near-zero latency and zero electrical power draw at the cable level, making them the preferred interconnect for short-reach FDR fabrics inside a single rack or between adjacent racks. The 3m length covers most ToR-to-server and intra-rack switch-uplink scenarios. Mellanox VPI cables negotiate based on port configuration, so the same physical cable serves either an InfiniBand FDR port or a 56GbE port without modification. BER on certified FDR DACs is rated below 1E-15 across the rated reach.
Deployment & Use Cases
Top-of-Rack to server FDR InfiniBand uplinks for HPC compute clusters. Storage-fabric interconnects between FDR-capable storage controllers and ConnectX-3/3 Pro adapters. 56GbE Ethernet uplinks where the switch is configured in Ethernet VPI mode. Intra-rack spine-leaf hops where reach stays at 3 meters or less. Lab and burn-in benches where a small-quantity lot is needed for a build-out.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MC2207128-003
Form Factor: QSFP+ to QSFP+ (Point-to-Point)
Cable Type: Passive Copper DAC
Length: 3 meters
Data Rate: 56Gb/s (4 lanes x 14Gb/s NRZ)
Protocol: VPI — InfiniBand FDR and 56GbE Ethernet
Conductor: Copper
Quantity: Lot of 6 cables
Condition: New — verified by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with Mellanox SwitchX/SwitchX-2 family (SX6000 series including SX6036, SX6025, SX6018) and Mellanox ConnectX-3 / ConnectX-3 Pro VPI adapters. Compatible with NVIDIA Quantum and Spectrum platforms only when ports are configured for FDR or 56GbE — not compatible with EDR (100G), HDR (200G), or NDR ports. This is a 3m assembly only, fixed length, not a breakout cable. Not interchangeable with QSFP28 (100G) or QSFP56 (HDR) ports. Always confirm port mode (IB vs ETH) on each end before installation.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS verifies every cable in the lot for connector seating, lane integrity, and packaging condition before shipment. We provide expert consultation on FDR/56GbE fabric cabling, global shipping from Israel, and 1–3 day handling time. Visit https://www.tes-itsolutions.com for the full catalog.