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DESCRIPTION
SPECIFICATIONS
INCLUDED
WARRANTY
SHIPPING
FAQS
DESCRIPTION
NVIDIA 920-9N42C-00FB-7C0 – SN5400 64 x QSFP56-DD 400GbE + 2 x SFP28 Open Ethernet Switch
The 920-9N42C-00FB-7C0 is an NVIDIA SN5400 series fixed-configuration Open Ethernet switch built on the NVIDIA Spectrum-4 ASIC, providing 64 x QSFP56-DD 400GbE + 2 x SFP28 in a 2U form factor. It delivers 25.6 Tbps of switching throughput and processes up to 33.3 Bpps, backed by a 160 MB fully shared packet buffer. NVIDIA’s official ordering description: “NVIDIA Spectrum-4 based 400GbE 2U Open Ethernet switch with Cumulus Linux authentication, 64 QSFP56-DD ports”.
Key Features
Ports: 64 x QSFP56-DD 400GbE + 2 x SFP28
Port speeds: 10/25/50/100/200/400GbE on ports 1-64; 1/10/25GbE on ports 65-66
Throughput: 25.6 Tbps
Packet rate: 33.3 Bpps
Packet buffer: 160 MB, fully shared across all ports
Software: Cumulus Linux factory designation – note: software licensing, subscription and support entitlements are not conveyed with refurbished hardware
Airflow: P2C (power-to-connector) – air intake at the power/fan (rear) side, exhaust at the connector (port) side (blue FRU handles/dots)
Power supplies: Hot-swappable AC PSUs (200-264V input)
Management processor: Intel Xeon hexa-core (Coffee Lake E-2276ME) with secured boot, 32 GB DDR4, 160 GB SSD
Typical power: 670 W (typical, passive cables)
Weight: 23.5 kg (51.8 lbs)
Dimensions (HxWxD): 3.46 x 17.2 x 28.3 in (88 x 438 x 720 mm)
Port Flexibility and Breakout
400GbE ports split down to 2 x 200GbE or 4 x 100GbE for high-radix fabrics. Actual modes depend on the installed network OS version and transceivers.
Spectrum-4 Architecture
SN5400 systems are built on the NVIDIA Spectrum-4 switching ASIC with a fully shared, monolithic packet buffer – every port can draw on the entire buffer, which absorbs microbursts and many-to-one incast far better than segmented-buffer designs in the same class. The platform supports RoCE (RDMA over Converged Ethernet) for storage and AI east-west traffic, rich telemetry with NVIDIA What Just Happened (WJH) hardware-level visibility, and the Open Ethernet model: the same hardware runs multiple network operating systems, so the fabric is never locked to one vendor stack.
Deployment Scenarios
400GbE spine and super-spine: wire-speed 400GbE with the Spectrum fully shared buffer
AI and accelerated computing fabrics: RoCE and adaptive routing capabilities for GPU cluster east-west traffic
Data center interconnect: deep-buffered high-speed handoff between fabric pods
Choosing Among the Variants
SN5000-generation systems use NVIDIA-format part numbers (920-…). Variants differ by airflow direction (C2P = port-side intake; P2C = power-side intake), power architecture (AC PSUs vs 48VDC busbar on the D models) and management CPU. Match airflow to your aisle layout and power input to your facility distribution; confirm optics/cables separately.
Frequently Asked Questions
What software does the 920-9N42C-00FB-7C0 run?
This OPN designates a factory build with Cumulus Linux, NVIDIA’s Linux-native network OS for automation-driven fabrics. As with all refurbished hardware, software licensing, subscription and support entitlements are not conveyed with refurbished hardware – units are tested on original-spec firmware, factory reset, and configuration wiped. Confirm any OS licensing or support requirements with NVIDIA for your production environment.
What is the airflow direction of the 920-9N42C-00FB-7C0?
The 920-9N42C-00FB-7C0 is the P2C (power-to-connector) variant: air intake at the power/fan (rear) side, exhaust at the connector (port) side. NVIDIA marks this direction with blue handles or dots on the fan and PSU modules. All FRUs in one chassis must share the same airflow direction.
What breakout options does the 920-9N42C-00FB-7C0 support?
400GbE ports split down to 2 x 200GbE or 4 x 100GbE for high-radix fabrics.
Is the refurbished 920-9N42C-00FB-7C0 tested before shipping?
Yes. BrightStar Systems inspects and tests every unit on original-spec firmware, performs a factory reset and configuration wipe, and backs it with warranty (1 year end-user / 90 days reseller).
920-9N42F-00RI-7C0 – related SN5600 platform – 64 x OSFP 800GbE + 1 x SFP28
Browse the full lineup on the NVIDIA Switches category page.
Refurbished by BrightStar Systems
BrightStar Systems supplies professionally tested refurbished NVIDIA and Mellanox networking hardware. Every unit is inspected, tested on original-spec firmware, factory reset, and configuration wiped before shipment, and backed by our standard warranty. Data center switching of this class is typically project-priced – request a quote for current availability and pricing.
SPECIFICATIONS
Model: 920-9N42C-00FB-7C0
Type: NVIDIA SN5400 Spectrum-4 Open Ethernet switch, 2U
Ports: 64 x QSFP56-DD 400GbE + 2 x SFP28
Throughput: 25.6 Tbps | Buffer: 160 MB
Software: Cumulus Linux (license not included)
Airflow: P2C (rear intake, port-side exhaust)
Typical power: 670 W
INCLUDED
Model: 920-9N42C-00FB-7C0
Type: NVIDIA SN5400 (Spectrum-4) Open Ethernet switch, 2U
Ports: 64 x QSFP56-DD 400GbE + 2 x SFP28
Software designation: Cumulus Linux
Airflow: P2C (power-to-connector)
WARRANTY
1-Year BrightStar warranty for end user customers
90-Day BrightStar Warranty for resellers
SHIPPING
Free FedEx Ground shipping within the United States
FedEx Overnight shipping available as well
FedEx International Shipping available for customers outside of the United States
FAQS
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