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1m (3ft) NVIDIA (InfiniBand) Compatible 400G OSFP Finned Top to 2 x 200G QSFP56 InfiniBand HDR Passive Direct Attach Copper Breakout Cable
P/N: O2Q56-400G-CU
US$139.00
10
Reviews
5
Questions
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4-Year Warranty
30-Day Returns
30-Day Exchange
(1000 In Stock)

Product Highlights

Qualified for InfiniBand HDR End-to-end Systems
Lowest-latency, Low Insertion Loss, Low Crosstalk, High-speed Interconnect
2x 4x50G-PAM4 to Dual 4x50G-PAM4
100% Verified by the Original, Perfectly Compatible with NVIDIA QM9700/9790 Devices
Minimum Bend Radius 33.5mm for Flexible Routing
Simplifies Patching and Offers a Cost-effective Way for Short Links
Compliant with OSFP MSA, IEEE 802.3cd and CMIS v4.0
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1m (3ft) NVIDIA (InfiniBand) Compatible 400G OSFP Finned Top to 2 x 200G QSFP56 InfiniBand HDR Passive Direct Attach Copper Breakout Cable
The NVIDIA/Mellanox MCP7Y60-H001 is an 400Gb/s twin-port OSFP to two 200Gb/s twin-port QSFP56 InfiniBand HDR Direct Attached Copper dual breakout cable. The 8-channel twin-port OSFP end uses a finned top form-factor for use in Quantum-2 and Spectrum-4 switch cages. The two 400G ends support 4-channels of 50G-PAM4 (200GbE/HDR) and use a flat top QSFP56 for use in ConnectX-6/7 adapters and BlueField-2/3 DPUs using riding heat sinks on the connector cage. This cable is compliant with OSFP MSA (Multi-Source Agreement) and IEEE 802.3cd standards.
DACs offer the lowest latency, so are widely used in data centers to connect servers and GPU compute systems to the top-of-rack (TOR) switches and link spine-to-super-spine switches inside racks over short cable lengths. DACs are also used to create InfiniBand storage fabrics with hard-disk-drive (HDD) and flash memory subsystems.
Featuring a simple design and minimal components, DAC cables offer the lowest-cost, lowest-latency, and near-zero-power connections for high-speed links. They enhance port bandwidth, density, configurability, and reduce power requirements in supercomputers and hyperscale systems.
Specifications
Part Number
O2Q56-400G-CU
Vendor Name
AICPLIGHT
Form Factor
OSFP (Finned Top) to 2x QSFP56
Max Data Rate
400Gbps
Media
Copper
Cable Type
Passive Twinax
Cable Length
1m (3ft)
Wire AWG
30AWG
Minimum Bend Radius
34.5mm
Power Consumption
≤0.1W
Jacket Material
PVC (OFNR)
Temperature
0 to 70°C (32 to 158°F)
Modulation Technology
PAM4
Application
400G Ethernet
Protocols
OSFP MSA, CMISRev4.0, IEEE802.3cd, SFF-8436, SFF-8665, SFF-8679, SFF-8636
Warranty
5 Years
Certification
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Questions & Answers
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All (5) Management (1)Product (1)Compatibility (1)Installation (1)Performance (1)
Q:

What is the difference between HDR and NDR InfiniBand cables?

by R***m on 2025-07-10 09:57:33

A:

HDR (High Data Rate) supports up to 200Gb/s per port, while NDR (Next Data Rate) can handle 400Gb/s. Both are used for high-performance computing, but NDR is designed for newer-generation systems requiring ultra-high bandwidth.

by CPLIGHT on 2025-07-10 10:23:26

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Q:

Can these cables be used for GPU Direct RDMA communication?

by f***m on 2025-07-10 09:32:02

A:

Absolutely. These InfiniBand cables support GPU Direct RDMA, enabling low-latency, high-throughput data transfers directly between GPUs across the fabric.

by Helpful on 2025-07-10 10:24:35

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Q:

Do these cables require special configuration after plugging in?

by J***m on 2025-07-10 08:56:17

A:

No special configuration is needed. The cables are hot-swappable and designed for plug-and-play operation in InfiniBand environments.

by Helpful on 2025-07-10 10:25:43

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Q:

Are these InfiniBand DAC/AOC cables compatible with NVIDIA/Mellanox ConnectX NICs?

by L***m on 2025-07-10 08:47:55

A:

Yes, our InfiniBand DAC and AOC cables are fully compatible with NVIDIA/Mellanox ConnectX-5, ConnectX-6, and ConnectX-7 NICs, as well as with NVIDIA Quantum and Spectrum switches.

by Helpful on 2025-07-10 10:24:04

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Q:

Do InfiniBand AOC cables support long-distance connections?

by M***m on 2025-07-10 08:47:03

A:

Yes, AOC (Active Optical Cables) support longer distances than DACs, typically up to 30 meters or more, while maintaining low latency and high bandwidth transmission.

by CPLIGHT on 2025-07-10 10:26:18

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Customer Reviews
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All (10) Performance (1)Compatibility (1)Ease of Use (1)Customer Support (1)Value (1)Reliability (1)Flexibility (1)Scalability (1)Quality (1)Delivery (1)
E
E***m
2025-06-29 12:15:50
Confirmed Purchase
5.0

We used breakout versions (1x400G to 4x100G) to expand our interconnect fabric and they worked flawlessly.

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G
G***m
2025-06-19 08:17:12
Confirmed Purchase
5.0

We used these InfiniBand HDR DAC cables to link GPU servers in our HPC cluster. The latency and bandwidth were excellent — no packet loss even under full load.

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3
3***m
2025-06-03 02:51:30
Confirmed Purchase
5.0

Running 24/7 in an AI training environment with zero errors so far. Excellent quality and heat management.

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2
2***m
2025-05-29 18:34:45
Confirmed Purchase
5.0

We had tight routing paths between racks and these DACs were flexible enough for clean cable management without strain.

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j
j***m
2025-05-27 05:05:10
Confirmed Purchase
5.0

Compared to OEM versions, these cables offer the same performance at a significantly lower cost. Great for large-scale deployment.

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z
z***m
2025-05-23 16:21:49
Confirmed Purchase
5.0

Customer service helped confirm the pinout for a custom breakout setup. Very knowledgeable and responsive team.

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W
W***m
2025-05-21 14:14:09
Confirmed Purchase
5.0

The connectors are solid, and the shielding is robust. No damage or signal degradation even after multiple insertions.

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4
4***m
2025-05-17 04:58:10
Confirmed Purchase
5.0

Worked out of the box with ConnectX-6 NICs and Quantum switches. Auto-negotiation and link detection were flawless across all ports.

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s
s***m
2025-05-03 07:10:16
Confirmed Purchase
5.0

Cables were clearly labeled and well packaged. Plug-and-play setup made our data center upgrade smooth and fast.

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5
5***m
2025-04-21 16:52:39
Confirmed Purchase
5.0

Order arrived earlier than expected. All cables were individually tested and labeled, saving us time during rack installation.

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