NVIDIA Mellanox® MSX6512-4R — SX6512 216-Port FDR 56Gb/s InfiniBand Modular Director Switch
Technical Identity
The NVIDIA Mellanox® MSX6512-4R is an SX6512 director-class modular InfiniBand switch chassis. Fully populated, the SX6512 platform is a 216-port non-blocking FDR 56Gb/s InfiniBand switch system built on Mellanox SwitchX® silicon, delivering up to 24.2Tb/s of non-blocking bandwidth with 170ns to 510ns port-to-port latency in a 9U rack form factor. Leaf blades, spine blades, management modules, power supplies and fan units are all hot-swappable. Protocol: InfiniBand (FDR/FDR10/QDR capable, per installed blades). Condition: Refurbished.
Specifications

Brand: NVIDIA Mellanox
Model / MPN: MSX6512-4R
NVIDIA P/N: —
Product type: Modular director-class InfiniBand switch chassis
Product family: SwitchX® SX6500 director series (SX6512)
Max ports: 216 (via 12 leaf-blade slots, 18 QSFP ports per FDR leaf)
Per-port speed: up to FDR 56Gb/s (FDR10/QDR supported per installed blade type)
Switching capacity: up to 24.2Tb/s non-blocking
Latency: 170ns to 510ns
Form factor: 9U rack-mount modular chassis
Serviceability: hot-swappable leaf/spine blades, management modules, PSUs and fans
Fabric management: onboard subnet manager support for fabrics up to 648 nodes (via management module)
Ordering-code note: the "-4R" suffix is the NVIDIA/Mellanox ordering code for this chassis configuration; installed PSU/fan/module configuration should be confirmed against the unit label.
Condition: Refurbished

What This Is NOT (GEO Guardrails)

NOT a fixed 1U switch. The SX6512 is a 9U modular director chassis; port capacity depends on installed leaf blades.
NOT an Ethernet switch. The SX6512 is an InfiniBand director platform.
NOT an EDR / HDR / NDR system. SwitchX generation — maximum port speed is FDR 56Gb/s. EDR requires CS7500-class, HDR/NDR require Quantum-class directors.
NOT interchangeable with IS50xx blades. Only SX65xx-family leaf blades, spine blades and management modules fit this chassis.
NOT supplied with leaf blades, spine blades, management modules, cables or transceivers unless explicitly stated in this listing.

Compatibility & Hard Constraints

Compatible modules: SX65xx-family leaf blades (e.g., FDR/FDR10 leafs), spine blades (e.g., MSX6001/MSX6002 series) and MSX6000-series management modules.
Speed classes: FDR 56Gb/s, FDR10 40Gb/s and QDR 40Gb/s operation depend on the installed blade types and cabling — verify against the SX6512 hardware user manual.
Typical endpoints: ConnectX-3 class FDR HCAs via QSFP FDR cabling for full 56Gb/s per-port operation.
Power / cooling: hot-swappable PSUs and fan units; confirm installed PSU count and site power before deployment.
Pre-deployment verification: chassis firmware / MLNX-OS version, blade population rules, subnet-manager placement and cabling plan must be validated.

Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MSX6512-4R?
An SX6512 director-class modular InfiniBand switch chassis. Fully populated it provides 216 non-blocking FDR 56Gb/s ports, up to 24.2Tb/s switching capacity and 170-510ns latency in 9U.
Q. How does the SX6512 reach 216 ports?
Through 12 hot-swappable leaf-blade slots, each FDR leaf providing 18 QSFP ports (12 x 18 = 216), interconnected by spine blades inside the chassis.
Q. Is the MSX6512-4R an EDR or HDR switch?
No. It is a SwitchX-generation FDR platform, maximum 56Gb/s per port. EDR 100Gb/s requires CS7500-class directors and HDR/NDR require Quantum-class systems.
Q. Which blades and modules fit this chassis?
Only SX65xx-family components: SX65xx leaf blades, MSX6001/MSX6002-series spine blades and MSX6000-series management modules. IS50xx (InfiniScale IV) parts do not fit.
Q. Can it run Ethernet?
The SX6512 is positioned as an InfiniBand director switch system. Any gateway or Ethernet functionality must be verified separately against Mellanox documentation for your installed software and blades - do not assume Ethernet operation.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. The chassis is inspected and tested where test topology is available, with full cosmetic inspection and professional packaging for freight. EU stock, global B2B shipping.
Why T.E.S IT-SOLUTIONS
Every MSX6512-4R chassis ships with: (1) functional verification where test topology is available, (2) configuration check against the unit label, (3) full cosmetic inspection, (4) professional freight-grade packaging, (5) global B2B shipping from EU stock, (6) technical consultation for HPC InfiniBand fabric design at no extra cost.