NVIDIA Mellanox® MSB7790-ES2F — Switch-IB EDR InfiniBand 1U Switch, 36 QSFP28 Ports
Technical Identity
The NVIDIA Mellanox® MSB7790-ES2F is a 1U Switch-IB based EDR InfiniBand switch featuring 36 QSFP28 ports, dual redundant AC power supplies, unmanaged operation, standard depth chassis, P2C (Port-to-Connector) airflow, and an included Rail Kit. It delivers 100Gb/s EDR InfiniBand per port with full non-blocking 3.6Tb/s aggregate switching capacity and sub-90ns port-to-port latency. Purpose-built for HPC clusters, AI/ML fabric back-end, and high-performance storage networks. Condition: New factory-sealed.
Specifications

Brand: NVIDIA Mellanox
Model / MPN: MSB7790-ES2F
Product family: Switch-IB (InfiniBand EDR)
Product type: InfiniBand Switch
Port count: 36× QSFP28 (EDR InfiniBand)
Port speed: 100Gb/s per port (EDR)
Aggregate capacity: 3.6Tb/s non-blocking
Port-to-port latency: <90ns (typical)
Chassis: 1U, standard depth
Power: 2× AC Power Supplies (redundant, hot-swap)
Management: Unmanaged (externally managed via UFM / OpenSM)
Airflow: P2C (Port-to-Connector, front-to-back)
Rail Kit: Included
Protocol: InfiniBand EDR (100Gb/s) — IB only, no Ethernet support
Condition: New factory-sealed

What This Is NOT

NOT an Ethernet switch. MSB7790-ES2F is InfiniBand EDR only — not compatible with Ethernet network infrastructure. For 100GbE Ethernet switching, see Spectrum (SN2700 series).
NOT HDR or NDR. EDR maximum — 100Gb/s per port. For HDR (200Gb/s), see Quantum QM8700. For NDR (400Gb/s), see Quantum-2 QM9700.
NOT managed. Unmanaged operation — no built-in subnet manager GUI. Requires external subnet manager (UFM or OpenSM) for IB fabric management.
NOT compatible with OSFP or QSFP56. Ports are QSFP28 (EDR 100Gb/s). QSFP56 is HDR; OSFP is NDR — neither will negotiate.
NOT supplied with cables or transceivers — order QSFP28 EDR interconnects separately.

Compatibility & Constraints

Cable type: QSFP28 EDR InfiniBand cables — passive copper DAC for short reach (≤3m typical), AOC or active copper (ACC) for longer runs (up to 100m AOC).
Adapter compatibility: NVIDIA ConnectX-4 (EDR), ConnectX-5 (EDR), ConnectX-5 Ex (EDR) — all with QSFP28 ports negotiating at EDR 100Gb/s.
Subnet management: Requires external subnet manager — NVIDIA UFM (Unified Fabric Manager) or open-source OpenSM — for IB fabric initialization, routing, and monitoring.
Airflow: P2C — port side is air intake, connector/PSU side is exhaust. Plan cold-aisle / hot-aisle rack airflow accordingly.
Power input: 100-240VAC, dual-feed for redundancy. Use independent rack PDUs / phases for true failover.
Pre-deployment: Confirm firmware compatibility with your MLNX_OFED / DOCA-Host driver stack and subnet manager version before production deployment.

Frequently Asked Questions (FAQ)
Q. What is the MSB7790-ES2F?
1U NVIDIA Switch-IB EDR InfiniBand switch: 36× QSFP28 at 100Gb/s each, 3.6Tb/s non-blocking, dual AC PSU, unmanaged, P2C airflow, Rail Kit included.
Q. What is EDR InfiniBand speed?
EDR = Enhanced Data Rate = 100Gb/s per port. MSB7790 provides 36 such ports for 3.6Tb/s total non-blocking capacity.
Q. Does MSB7790-ES2F need a subnet manager?
Yes — unmanaged switch. Requires external subnet manager (NVIDIA UFM or OpenSM) for IB fabric routing and initialization.
Q. What cables work with MSB7790-ES2F?
QSFP28 EDR InfiniBand-rated cables — NVIDIA passive copper DAC for short reach, AOC or ACC for longer distances.
Q. What condition does T.E.S IT-SOLUTIONS supply?
New factory-sealed, verified, EU stock, global B2B express shipping.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-center networking specialist. Every unit is identified by MPN before leaving our warehouse. EU stock, multi-currency invoicing, worldwide express shipping, and free pre-sale technical consultation.