Overview

Supermicro SRS-GB300-NVL72 delivers extreme AI performance with 72 NVIDIA B300 GPUs and 36 NVIDIA Grace CPUs via GB300 Grace Blackwell Superchips, providing up to 21TB HBM3e GPU memory, 17TB LPDDR5X system memory, 144 E1.S PCIe 5.0 bays, and 1.8TB/s NVLink interconnect inside a liquid-cooled 48U rack engineered for next-generation hyperscale workloads.

Specifications

Model Number: SRS-GB300-NVL72

Brand: Supermicro

Alt Part Number(s): SRS-GB300-NVL72

Product Type: Server

Technical Description

Brand: Supermicro

Model: SRS-GB300-NVL72SRS-GB300-NVL72SRS-GB300-NVL72SRS-GB300-NVL72SRS-GB300-NVL72

Form Factor: 1U, GPU Servers

GPUs: 72 NVIDIA B300 GPUs via NVIDIA GB300 Grace Blackwell Superchips

CPUs: 36 NVIDIA Grace CPUs via NVIDIA GB300 Grace Blackwell Superchips

GPU memory: Up to 21 TB HBM3e

System Memory: Up to 17 TB LPDDR5X

Storage: Up to 144 E1.S PCIe 5.0 drive bays

Nodes: 18x 1U ARS-121GL-NB3

Networking: 9x NVLink Switch; 4-ports per compute tray; 1.8TB/s GPU-to-GPU interconnect

Power: 8x 1U 33kW (6x 5.5kW PSUs); total power 132kW

Liquid Cooling: 1x in-rack Supermicro 250kW capacity CDU with redundant PSU and dual hot-swap pumps

Rack Enclosure: 48U; 19”-width

Dimensions: W 600 x D 1068 x H 2236

Compute Fabric: NVIDIA Quantum-X800 InfiniBand; NVIDIA Spectrum-X Ethernet; integrated NVIDIA ConnectX-8 SuperNICs; up to 800Gb/s compute fabric

In-Band Network: Up to 200Gb/s In-Band Management speeds with NVIDIA BlueField-3 DPUs

Out-of-band Network: 1G/10G Ethernet out-of-band management

Liquid Cooling Options: In-Rack CDU: Up to 250 kW capacity with N+1 redundant pumps; In-Row CDU: Up to 1.8 MW capacity with N+1 redundant pumps (supports up to 8 racks); L2A Sidecar CDU: Up to 200 kW capacity with N+1 redundant pumps (no facility water required)

*