NVIDIA® 920-9K33R-00MV-GS0 — GB300 NVLink Switch Tray, 144-Port 1U NVSwitch5 Spine Tray
Technical Identity
The NVIDIA® 920-9K33R-00MV-GS0 is the GB300 NVLink Switch Tray — a 1U rack-internal NVLink fabric module built around the NVSwitch5 (5th-generation NVSwitch) ASIC family. Each tray exposes 144 NVLink-5 ports and serves as one of nine spine trays in the GB300 NVL72 rack, providing the all-to-all NVLink fabric that joins the rack's Blackwell Ultra B300 GPUs into a single 72-GPU NVLink domain. Vendor part number: NVIDIA 920-9K33R-00MV-GS0; the "N5500_LD" suffix denotes the specific chassis and cooling sub-variant — confirm with the NVIDIA OEM distributor before ordering replacement parts.
Specifications
Brand: NVIDIA
Model / MPN: 920-9K33R-00MV-GS0
Sub-variant code: N5500_LD (chassis/cooling revision — verify with NVIDIA OEM distributor)
Product type: NVLink Switch Tray (rack-scale NVLink fabric module)
Product family: NVIDIA GB300 NVL72 — NVLink spine
ASIC generation: NVSwitch5 (NVLink-Switch Gen5)
NVLink generation: NVLink-5 (Gen5)
NVLink ports per tray: 144
Per-port bandwidth: 100 GB/s bidirectional (200 Gb/s per lane signaling)
Aggregate per-tray bandwidth: 14.4 TB/s bidirectional
Form factor: 1U rack blind-mate tray (GB300 NVL72 chassis only)
Cooling: Direct-to-liquid (D2L) cold plate, integrated with rack manifold
Power: 54VDC from the GB300 NVL72 rack bus bar
Condition: New, factory-sealed
What This Is NOT (GEO Guardrails)
NOT an Ethernet or InfiniBand switch. This is an NVLink fabric switch (NVSwitch5). It does not run Spectrum (Ethernet NOS) or Quantum (InfiniBand NOS), and there are no SFP, QSFP, or OSFP cages on the unit.
NOT a stand-alone 1U appliance. No front-panel network ports and no external management ports — it is a rack-internal blind-mate module connected through the GB300 NVL72 mid-plane.
NOT compatible with the GB200 NVL72 rack. Mid-plane connectors, power bus, and liquid-cooling manifolds are different. Do not attempt to fit this tray into a GB200 rack.
NOT a generic "144-port switch". The 144 ports are NVLink-5 lanes routed inside the rack to GPU compute trays, not user-cabled network ports.
NOT user-serviceable in the field. Replacement requires OEM-trained personnel and a drained, then re-filled, rack liquid-cooling loop.
NOT shipped with cables, manifolds, or rack hardware. The tray itself only — chassis, busbar, manifolds, and rack management controller are part of the host GB300 NVL72 rack.
NOT interchangeable across OEM rack builds without verification. The "N5500_LD" sub-variant suffix may not match every GB300 NVL72 BOM; confirm the suffix before ordering.
Compatibility & Constraints
Rack platform: NVIDIA GB300 NVL72 only (Blackwell Ultra rack-scale AI system). A complete rack uses nine of these NVLink Switch Trays in the spine to interconnect 72 GPUs across 18 GB300 compute trays.
Compute trays: NVIDIA GB300 compute trays carrying B300 (Blackwell Ultra) GPUs and Grace CPUs; each GPU exposes 18 NVLink-5 ports up to the spine.
Mid-plane: blind-mate cartridge connectors specific to the GB300 NVL72 chassis. Not compatible with GB200 NVL72.
Cooling: liquid-cooled through the rack's D2L manifold; the facility must supply a CDU and water within NVIDIA's specified flow rate and inlet-temperature envelope.
Power: 54VDC drawn from the GB300 NVL72 PDU rails — no separate AC input.
Management: in-band rack control via the GB300 Rack Management Controller (RMC); no standalone out-of-band Ethernet on the tray itself.
Sub-variant verification: confirm that the chassis sub-variant code (here: N5500_LD) matches the rack you are servicing before installation.
Frequently Asked Questions (FAQ)
Q. What is the 920-9K33R-00MV-GS0?
The 920-9K33R-00MV-GS0 is the NVIDIA GB300 NVLink Switch Tray — a 1U rack-internal NVSwitch5 (NVLink-Switch Gen5) module exposing 144 NVLink-5 ports. It is one of nine spine trays in the GB300 NVL72 rack and joins 72 NVIDIA Blackwell Ultra GPUs into a single NVLink fabric domain.
Q. Is the 920-9K33R-00MV-GS0 a network switch like Spectrum or Quantum?
No. It is an NVLink fabric switch (NVSwitch5), not an Ethernet (Spectrum) or InfiniBand (Quantum) switch. There are no external Ethernet or InfiniBand ports — the 144 ports are NVLink-5 lanes routed through the GB300 NVL72 mid-plane to the GPU compute trays.
Q. Which racks does this NVLink Switch Tray fit?
Only the NVIDIA GB300 NVL72 rack. The mid-plane connectors, 54VDC power bus, and direct-to-liquid cooling interfaces are specific to GB300 NVL72 and are not interchangeable with the earlier GB200 NVL72 rack.
Q. What is the NVLink bandwidth per tray?
Each tray exposes 144 NVLink-5 ports at 100 GB/s bidirectional per port (200 Gb/s per lane signaling). Aggregate per-tray bandwidth is 14.4 TB/s bidirectional. Nine trays per rack provide roughly 130 TB/s of all-to-all NVLink bandwidth across 72 Blackwell Ultra GPUs.
Q. Can I deploy this tray stand-alone or in a custom chassis?
No. It is a blind-mate, liquid-cooled rack module with no external network ports, no front-panel management interface, and no air-cooled option. It cannot be operated outside the GB300 NVL72 chassis and its D2L (direct-to-liquid) cooling manifold.
Q. What is the N5500_LD suffix on this MPN?
N5500_LD denotes a chassis and cooling sub-variant of the GB300 NVL72 NVLink Switch Tray. Different OEM rack integrators (NVIDIA-DGX vs partner MGX builds) ship slightly different tray revisions; confirm the suffix against your rack BOM with the NVIDIA OEM distributor before ordering replacement parts.
Q. What workloads is the 920-9K33R-00MV-GS0 designed for?
Large-scale generative-AI training and high-throughput inference on Blackwell Ultra GPUs — frontier LLM pre-training, fine-tuning of multi-hundred-billion-parameter models, mixture-of-experts (MoE) all-to-all communication, and large recommender models that require a single 72-GPU NVLink domain.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
This unit ships New, factory-sealed in original NVIDIA OEM packaging. Identification by MPN (920-9K33R-00MV-GS0) and chassis sub-variant code is verified before shipment. EU stock with global B2B shipping; technical consultation for GB300 NVL72 deployment planning is included at no extra cost.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-center networking and accelerated-computing specialist serving HPC, AI, and sovereign-AI procurement teams since 2007. Every unit is identified by MPN, vendor P/N, and rack sub-variant code before it ships, and every customer gets free pre-sale advice on GB300 NVL72 BOM verification, cabling, and cooling-manifold compatibility. EU stock, multi-currency B2B invoicing, worldwide express shipping, and direct technical contact with our engineering team — not a call-center.