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800G OSFP Breakout InfiniBand NDR

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800G OSFP Breakout InfiniBand NDR Overview

The 800G OSFP Breakout InfiniBand NDR category contains ten breakout cables, including four passive DACs, four ACCs, and two AECs. Each cable divides one 800G finned-top OSFP interface into either two 400G or four 200G OSFP or QSFP112 connections. Available in lengths from 1m to 7m, the series supports InfiniBand NDR links between Quantum-2 switches, ConnectX-7 adapters, servers, and other network devices in AI, cloud data center, and high-performance computing environments.

O800-2O-NDR-C is a 1–3m passive copper breakout cable connecting one 800G finned-top OSFP port to two 400G flat-top OSFP ports. Each branch carries 400G over four 100G PAM4 channels, supporting Quantum-2 switch-to-ConnectX-7 adapter links.

O800-2Q-NDR-C is a 1–3m passive copper breakout cable that divides one 800G finned-top OSFP port into two 400G QSFP112 connections for short-distance InfiniBand NDR device links.

O800-4O-NDR-C is a 1–3m passive copper breakout cable connecting one 800G finned-top OSFP port to four 200G finned-top OSFP ports, with the total bandwidth divided evenly across four branches.

O800-4Q-NDR-C is a 1–3m passive copper breakout cable that divides one 800G finned-top OSFP connection into four 200G QSFP112 branches for high-density InfiniBand NDR links.

O800-2O-NDR-AC is a 3–5m active copper breakout cable connecting one 800G finned-top OSFP port to two 400G flat-top OSFP ports. Each branch supports four 100G PAM4 channels for switch-to-adapter connections.

O800-2Q-NDR-AC is a 3–5m active copper breakout cable that divides one 800G finned-top OSFP interface into two 400G QSFP112 connections for InfiniBand NDR networks.

O800-4O-NDR-AC is a 3–5m active copper breakout cable connecting one 800G finned-top OSFP port to four 200G finned-top OSFP ports, with each branch carrying 200G.

O800-4Q-NDR-AC is a 3–5m active copper breakout cable that distributes one 800G finned-top OSFP link across four 200G QSFP112 branch interfaces.

O800-2O-NDR-AE is a 5–7m active electrical breakout cable connecting one 800G finned-top OSFP port to two 400G flat-top OSFP ports. Each branch carries 400G over four 100G PAM4 channels.

O800-2Q-NDR-AE is a 5–7m active electrical breakout cable that divides one 800G finned-top OSFP interface into two independent 400G QSFP112 connections.

FAQ

What breakout configurations are available in the 800G OSFP Breakout InfiniBand NDR category?

Two configurations are available. The ten cables divide one 800G finned-top OSFP connection into either two 400G branches or four 200G branches. Depending on the model, the branch connectors are OSFP or QSFP112. Quantum-2 switches support 400G and 200G port configurations through twin-port OSFP cages.

Which 800G OSFP Breakout InfiniBand NDR models terminate in two 400G flat-top OSFP branches?

Three models provide two 400G flat-top OSFP branches. O800-2O-NDR-C is a 1–3m passive DAC, O800-2O-NDR-AC is a 3–5m active copper cable, and O800-2O-NDR-AE is a 5–7m active electrical cable.

Which models divide an 800G finned-top OSFP connection into two 400G QSFP112 branches?

Three models provide this configuration. O800-2Q-NDR-C is available in 1–3m, O800-2Q-NDR-AC in 3–5m, and O800-2Q-NDR-AE in 5–7m. Each cable provides two separate 400G QSFP112 branch connectors.

How do O800-4O-NDR-C and O800-4O-NDR-AC provide four 200G OSFP connections?

Both models divide one 800G finned-top OSFP interface into four 200G finned-top OSFP branches. O800-4O-NDR-C is a 1–3m passive DAC, while O800-4O-NDR-AC is a 3–5m active copper cable.

What is the difference between O800-4Q-NDR-C and O800-4Q-NDR-AC?

The cable technology and supported length differ. O800-4Q-NDR-C is a 1–3m passive DAC, while O800-4Q-NDR-AC is a 3–5m active copper cable. Both terminate in four 200G QSFP112 branches.

How do the available length ranges differ among the passive DAC, ACC, and AEC models in this category?

Passive DAC models cover 1–3m, active copper cable models cover 3–5m, and active electrical cable models cover 5–7m. The listed AEC models support only the two-branch 2×400G configuration; no 4×200G AEC model is included.

Which 800G OSFP Breakout InfiniBand NDR models provide QSFP112 branches for BlueField-3 or QSFP112-based ConnectX-7 ports?

Five models provide QSFP112 branches: O800-2Q-NDR-C, O800-4Q-NDR-C, O800-2Q-NDR-AC, O800-4Q-NDR-AC, and O800-2Q-NDR-AE. NVIDIA documents QSFP112 interfaces for ConnectX-7 and BlueField-3 endpoints, while BlueField-3 does not accept OSFP devices.

How are the 100G PAM4 channels distributed across the 2×400G and 4×200G breakout configurations?

Eight 100G PAM4 channels are distributed in total. Each branch in a 2×400G cable carries four 100G PAM4 channels, while each branch in a 4×200G cable carries two 100G PAM4 channels.

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