---
title: "InfiniBand 40P HDR Fabric Switch - NVIDIA QM8700/QM8790"
slug: "infiniband-40p-hdr-fabric-switch-nvidia-qm8700qm8790"
description: "InfiniBond 4U HDR Fabric S, NVIDIA Q800/890, speeds up data transfer and supports advanced networking for high-performance computing."
updated: 2026-10-28T02:16:45Z
published: 2026-10-28T02:16:45Z
canonical: "docs.vastdata.com/infiniband-40p-hdr-fabric-switch-nvidia-qm8700qm8790"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vastdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# InfiniBand 40P HDR Fabric Switch - NVIDIA QM8700/QM8790

## **VAST SKU**: HDR-NVMEF-1X40

## **NVIDIA OPN:** MQM8700-HS2F

## Configurations

---

| Switch | Switch Speed | Ports | Connections |
| --- | --- | --- | --- |
| QM8700 | HDR 200Gb/s | 40 + 2xRJ45 | QSFP56 |
| QM8790 | HDR 200Gb/s | 40 | QSFP56 |

## Specification

---

| ### Switch |
| --- |
| **Switch:** | - QM8700 (Managed) /QM8790 (Unmanaged) |
| **Supported Speeds:** | - 40, 56, 100, 200 Gb/s per port |
| **Throughput:** | - 16 Tb/s |
| **CPU:** | - x86 ComEx Broadwell D-1508 |
| **PCIe:** | - 4x Gen 2.0 |
| **Switch:** | - NVIDIA Spectrum® |
| **Memory:** |  |
| ### Environmental Data |
| **Dimensions:** | - 1.7” (H) x 17” (W) x23.2” (D), 43.6mm (H) x 433.2mm (W) x 590.6mm (D) |
| **Weight:** | - 12.488 Kg |
| **Mounting:** | - 19” Rack mount |
| **Airflow** | - P2C |
| **Input Voltage:** | - 100-127VAC 50/60Hz 10A; 200-240 50/60Hz 6A |
| **Power Consumption:** | - TBC |
| **Temperature:** | - Operational: 0° to 40°C - Non-Operational: -40° to 70°C |
| **Humidity:** | - Operational: 10% - 85% non-condensing - Non-Operational: 10% - 90% non-condensing |
| **Altitude:** | - 3050m |
| **Noise Level** | - 71.9 dB(A) |
| ### Certifications |
| **Safety /EMC** | - CB - cTUVus - CE - CU - FCC - VCCI - ICES - RCM |
| **RoHS:** | - RoHS compliant |

## Manufacturer Documentation

---

NVIDIA Spec Sheet: [https://docs.nvidia.com/networking/display/QM87XX/specifications.pdf](https://docs.nvidia.com/networking/display/QM87XX/specifications.pdf)

Mellanox Spec Sheet: [https://network.nvidia.com/files/doc-2020/pb-qm8700.pdf](https://network.nvidia.com/files/doc-2020/pb-qm8700.pdf)

## Product Images

---

Front: QM8700

![The image depicts an electronic circuit board with a series of labeled switches and input/output (I/O) ports, designed to manage control signals in a networking or computing environment. The black panel features multiple rows of switches and connectors that facilitate the connection and configuration of various components within the system architecture.](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/1ba87ebb-3507-47c6-89fa-edcc93728f76.png?sv=2026-02-06&spr=https&st=2026-11-08T10%3A30%3A30Z&se=2026-11-08T11%3A30%3A30Z&sr=c&sp=r&sig=Jmxj9JTRnynJ%2BbOK0RH%2BKglCzTu%2BLJ%2ByjYdwRNjMQso%3D)

Rear: QM8700/QM8790

![The image depicts an open rackmount server with six hot-swappable hard drive bays slots, each equipped with a blue label and a perforated cover for air circulation. The front panel includes power supply units (PSUs) on either side of the hard drives, providing dual redundant power capabilities.](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/36b077e5-02bf-464a-a125-e4bba61d5503.png?sv=2026-02-06&spr=https&st=2026-11-08T10%3A30%3A30Z&se=2026-11-08T11%3A30%3A30Z&sr=c&sp=r&sig=Jmxj9JTRnynJ%2BbOK0RH%2BKglCzTu%2BLJ%2ByjYdwRNjMQso%3D)

Front: QM8790

![The image depicts a backplane interface with multiple socket connectors labeled "Auto," designed to support various types of modules, likely used in field-programmable gate arrays (FPGAs) or reconfigurable computing systems. The interface is equipped with a status LED and connection points for power and signal management.](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/1e53a3ef-e6db-4173-a5f2-6f2e29430116.png?sv=2026-02-06&spr=https&st=2026-11-08T10%3A30%3A30Z&se=2026-11-08T11%3A30%3A30Z&sr=c&sp=r&sig=Jmxj9JTRnynJ%2BbOK0RH%2BKglCzTu%2BLJ%2ByjYdwRNjMQso%3D)