A knowledgeable, US-based, Network Hardware Specialist, with 15+ years experience, will review your request.
Based on the exact SKU, we will verify airflow and other details to calculate a quote.
A BrightStar Systems' specialist will personally reach out within 24 hours.
Guaranteed safe & secure checkout​
Payment Methods
Free ground shipping to all 50 states
DESCRIPTION
SPECIFICATIONS
INCLUDED
WARRANTY
SHIPPING
FAQS
DESCRIPTION
NVIDIA MSN4700-WS2R – SN4700 32 x QSFP-DD 400GbE Open Ethernet Switch
The MSN4700-WS2R is an NVIDIA SN4700 series fixed-configuration Open Ethernet switch built on the NVIDIA Spectrum-3 ASIC, providing 32 x QSFP-DD 400GbE in a 1U form factor. It delivers 25.6 Tbps of switching throughput and processes up to 8.4 Bpps, backed by a 64 MB fully shared packet buffer. NVIDIA’s official ordering description: “NVIDIA Spectrum-3 based 400GbE 1U Open Ethernet Switch with Onyx, 32 QSFP-DD ports, 2 AC PSUs”.
Key Features
Ports: 32 x QSFP-DD 400GbE
Port speeds: 1/10/25/40/50/100/200/400GbE per port
Throughput: 25.6 Tbps
Packet rate: 8.4 Bpps
Packet buffer: 64 MB, fully shared across all ports
Software: NVIDIA Onyx (MLNX-OS) factory designation – note: software licensing, subscription and support entitlements are not conveyed with refurbished hardware
Airflow: C2P (connector-to-power) – air intake at the connector (port) side, exhaust at the power/fan (rear) side (red FRU handles/dots)
Power supplies: 2 hot-swappable AC PSUs (1+1 redundant)
Dimensions (HxWxD): 1.72 x 16.85 x 22.3 in (44 x 428 x 568.5 mm)
Part numbers: Legacy OPN MSN4700-WS2R = NVIDIA 920-9N301-00RB-0X0 (same hardware)
Port Flexibility and Breakout
Each QSFP-DD port splits to 2 x 200GbE or 4 x 100GbE, for up to 128 x 100GbE per system. Actual modes depend on the installed network OS version and transceivers.
Spectrum-3 Architecture
SN4700 systems are built on the NVIDIA Spectrum-3 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
SN4700 OPNs decode as follows: the letter before the airflow character sets the speed class (B = the lower speed build, C = 100GbE, V = 200GbE, W = 400GbE); F = P2C airflow (power-side intake, port-side exhaust) and R = C2P airflow (port-side intake, power-side exhaust); a trailing C = Cumulus Linux, a trailing O = ONIE only, and no trailing letter = NVIDIA Onyx. Important: NVIDIA’s F/R airflow letters are defined by intake side at the power side or connector side – do not assume they match other vendors’ F/R conventions. Match the airflow variant to your hot-aisle/cold-aisle layout and the software designation to your operations model; the underlying switch hardware within a speed class is otherwise identical.
Mellanox and NVIDIA Part Numbers
The SN4700 was designed by Mellanox Technologies, which NVIDIA acquired in 2020; the same platform has been sold under both the Mellanox and NVIDIA names. It carries two interchangeable part numbers: the original Mellanox-style OPN MSN4700-WS2R and the newer NVIDIA number 920-9N301-00RB-0X0 – both identify exactly the same hardware. Listings and documentation referring to a “Mellanox SN4700” and an “NVIDIA SN4700” describe the same switch.
Frequently Asked Questions
Is the MSN4700-WS2R a Mellanox switch or an NVIDIA switch?
Both names refer to the same product. The SN4700 platform was developed by Mellanox, which NVIDIA acquired in 2020. The OPN MSN4700-WS2R and the NVIDIA part number 920-9N301-00RB-0X0 identify identical hardware.
What software does the MSN4700-WS2R run?
This OPN designates a factory build with NVIDIA Onyx (MLNX-OS), the turnkey switch operating system with a classic CLI. 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 MSN4700-WS2R?
The MSN4700-WS2R is the C2P (connector-to-power) variant: air intake at the connector (port) side, exhaust at the power/fan (rear) side. NVIDIA marks this direction with red 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 MSN4700-WS2R support?
Each QSFP-DD port splits to 2 x 200GbE or 4 x 100GbE, for up to 128 x 100GbE per system.
Is the refurbished MSN4700-WS2R 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).
MSN4410-WS2FC – related SN4410 platform – 24 x QSFP28-DD 100GbE + 8 x QSFP-DD 400GbE
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: MSN4700-WS2R
Type: NVIDIA SN4700 Spectrum-3 Open Ethernet switch, 1U
Ports: 32 x QSFP-DD 400GbE
Throughput: 25.6 Tbps | Buffer: 64 MB
Software: NVIDIA Onyx (license not included)
Airflow: C2P (port-side intake, rear exhaust)
Typical power: 630 W
INCLUDED
Model: MSN4700-WS2R
Type: NVIDIA SN4700 (Spectrum-3) Open Ethernet switch, 1U
Ports: 32 x QSFP-DD 400GbE
Software designation: NVIDIA Onyx
Airflow: C2P (connector-to-power)
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
Do you have questions about buying or selling hardware?
OUR KNOWLEDGEABLE TEAM IS WAITING TO ASSIST YOU »
