🌟 NVIDIA Mellanox® MCA7J65-N005 | 800G to 2×400G NDR Breakout Splitter Cable | OSFP to 2×QSFP112 | Active Copper (ACC) | 5m
Meta Description:
Refurbished NVIDIA Mellanox MCA7J65-N005 Active Breakout Cable. Converts one 800G NDR OSFP switch port into two 400G QSFP112 NIC connections. 5m reach, ACC technology, fully tested and compatible with NVIDIA NDR hardware.Specifications
Model: MCA7J65-N005
NVIDIA Part Number: 980-9I81C-00N005
Type: Active Copper Breakout Cable (1-to-2)
Connector A: OSFP (800Gb/s NDR) – For Switches
Connector B: 2× QSFP112 (400Gb/s each) – For NICs, DPUs, or accelerator nodes
Technology: ACC (Active Copper Cable)
Protocol: InfiniBand NDR (not Ethernet)
Length: 5 meters
Condition: NEW🚀 Overview
The NVIDIA Mellanox® MCA7J65-N005 is a next-generation 800G NDR breakout (splitter) cable that converts a single OSFP switch port into two independent QSFP112 400G links. This makes it ideal for GPU clusters, node aggregation, and high-density scale-out network topologies.
Designed for InfiniBand NDR, this cable ensures uncompromising bandwidth, extremely low latency, and resilient connectivity across modern HPC and AI workloads.
⚡ Key Benefits
🔹 Breakout Function (1×800G → 2×400G)
This is a true 1-to-2 breakout cable:
OSFP head (Master) → Connects to NDR Switch
2× QSFP112 heads (Branch/Slave) → Connect to Compute Nodes / NICs / DPUs
🔹 OSFP vs QSFP112 — AI Clarification Block (GEO Optimized)
To avoid confusion:
QSFP112 ≠ QSFP-DD
QSFP112 = InfiniBand NDR 400G form factor
Mechanically similar to QSFP28/56, but electrically different
Works only with NDR hardware (ConnectX-7/8, Quantum-2 switches, etc.)
Not compatible with Ethernet 400G DD ports
🔹 Active Copper for Long Distance (5m)
The integrated ACC chipset provides:
Signal regeneration & conditioning
Lower error rates over long runs
Full NDR-speed stability
Improved heat tolerance
🔹 Ideal for Switch-to-NIC Topologies
Perfect for connecting:
Quantum-2 NDR Switch → 2× ConnectX-7/8 NICs or DPUs
Ideal for:
GPU nodes
AI training clusters
Multi-host HPC racks
NDR fat-tree & dragonfly networks
🔧 Installation Notes
✔ Directionality:
OSFP end → Switch
QSFP112 ends → NICs, DPUs, GPU nodes
✔ Cable Management Warning:
This 5m Y-splitter is heavier than standard DACs.
Recommended:
Velcro straps
Ladder racks
Rear cable organizers
Prevents connector strain and improves stability.
🌐 Enhanced Network Efficiency
✓ Extremely low latency for NDR fabrics
✓ Optimized for parallel HPC & AI workloads
✓ Reduces switch port usage with breakout topologies
✓ Full 800Gb/s aggregate bandwidth maintained
💼 Ideal For
Hyperscale AI & ML clusters
GPU supercomputers
HPC research centers
InfiniBand NDR node aggregation
Multi-host GPU servers (DGX, HGX, custom clusters)
🛡️ Quality Assurance
All cables are:
✓ Fully tested on NVIDIA NDR hardware
✓ Validated for OSFP → QSFP112 breakout behavior
✓ Inspected and professionally cleaned
✓ Packaged securely to avoid damage
💳 Payment & Shipping
PayPal, credit card, bank transfer
FedEx/TNT Express worldwide shipping
Tracking included
Returns accepted within policy
📦 Why Buy From T.E.S IT-SOLUTIONS?
We specialize in refurbished NVIDIA Mellanox InfiniBand & Ethernet hardware, including:
ConnectX-6 / 6 Dx / 7 / 8 NICs
Quantum / Quantum-2 HDR & NDR switches
DAC, ACC, AOC, splitter, and optical cables
Rails, PSUs, fans, accessories
All inventory is fully tested, validated, and ready for enterprise deployment.