800G OSFP to 2x 400G OSFP | Breakout DAC Cables

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1m(3ft) NVIDIA/Mellanox MCP7Y00-N001(980-9I432-00N001) Compatible 800G OSFP Finned Top to 2x 400G OSFP Flat Top InfiniBand NDR Passive Direct Attach Copper Breakout Cable

P/N: O800-2O400-C1

US$191.00

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4-Year Warranty

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（1000 In Stock）

Product Highlights

Qualified for InfiniBand NDR End-to-end Systems

Lowest-latency, Low Insertion Loss, Low Crosstalk, High-speed Interconnect

8x 100G-PAM4 to Dual 4x 100G-PAM4

100% Verified by the Original, Perfectly Compatible with NVIDIA QM9700/9790 Devices

Minimum Bend Radius 72mm for Flexible Routing

Simplifies Patching and Offers a Cost-effective Way for Short Links

Compliant with OSFP MSA, IEEE 802.3ck and CMIS v4.0

Specifications

Q&A

Reviews

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1m(3ft) NVIDIA/Mellanox MCP7Y00-N001(980-9I432-00N001) Compatible 800G OSFP Finned Top to 2x 400G OSFP Flat Top InfiniBand NDR Passive Direct Attach Copper Breakout Cable

The NVIDIA/Mellanox InfiniBand MCP7Y00-N002 Cable is an 800Gb/s twin-port OSFP to two 400Gb/s twin-port OSFP 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 100G-PAM4 (400G) and use a flat top OSFP for use in ConnectX-7 adapters using riding heat sinks on the connector cage. This cable is compliant with OSFP MSA (Multi-Source Agreement) and IEEE 802.3ck 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

NVIDIA/Mellanox InfiniBand Compatible

MCP7Y00-N001

Vendor Name

AICPLIGHT

Form Factor

800G OSFP (Finned Top) to 2× 400G OSFP (Flat Top)

Max Data Rate

800Gbps

Media

Copper

Cable Type

Passive Twinax

Minimum Bend Radius

72mm

Power Consumption

≤0.1W

Cable Length

1m (3ft)

Wire AWG

26AWG

Temperature Range

0 to 70°C (32 to 158°F)

Jacket Material

PET

Protocols

OSFP MSA, CMIS Rev 4.0, IEEE 802.3 ck

Modulation Format

PAM4

Certification

Questions & Answers

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All (5) Management (1)Product (1)Compatibility (1)Installation (1)Performance (1)

What is the difference between HDR and NDR InfiniBand cables?

by h***m on 2025-07-10 09:44:04

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 Helpful on 2025-07-10 10:23:26

Helpful 0

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

by 5***m on 2025-07-10 09:38:43

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

Helpful 0

Do these cables require special configuration after plugging in?

by j***m on 2025-07-10 09:20:26

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

Helpful 0

Do InfiniBand AOC cables support long-distance connections?

by c***m on 2025-07-10 09:10:16

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 Helpful on 2025-07-10 10:26:18

Helpful 0

Can these cables be used for GPU Direct RDMA communication?

by 4***m on 2025-07-10 09:07:14

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

Helpful 0

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)

H***m

2025-06-30 07:58:03

Confirmed Purchase

5.0

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

Helpful 0

1***m

2025-06-27 14:46:58

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.

Helpful 0

1***m

2025-06-18 18:12:07

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.

Helpful 0

f***m

2025-06-17 23:35:35

Confirmed Purchase

5.0

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

Helpful 0

7***m

2025-06-10 09:11:31

Confirmed Purchase

5.0

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