MXH932 Transparent Host & Target Adapter

PCIe 4.0 x16 Transparent Host / Target Adapter

The MXH932 PCIe 4.0 x16 Transparent Host / Target Adapter is our high performance PCIe IO product. Based on Microchip Switchtec Gen4 PCI Express bridging architecture, the MXH932 Adapter includes advanced features for PCIe 4.0 transparent bridging and clock isolation. The MXH932 is compliant with the MXS924 24 port PCIe 4.0 switch.

  • One x16 PCIe edge port
  • Four x4 PCIe Cable ports
  • PCIe 4.0 cables
  • Copper and Fiber cable support
  • Quad SFF-8644 Connectors
  • Host / Target Transparent Bridging
  • Low Profile Design
  • Optional board management software

Product Data

The MXH932 PCIe 4.0 Host/Target Adapter is our high performance transparent solution for connecting servers to external I/O subsystems. Based on Microchip® Gen4.0 PCI Express bridging architecture, the MXH932 adapter enables reliable transparent PCIe cable connections and clock isolation.

For high performance application, such as GPU farms, test and measurement equipment, medical equipment, and storage subsystem, the MXH932 delivers flexibility and performance with extremely high data quality. It combines 256 Gb/s performance with the low latency of PCI Express, which is ideal for external I/O Expansion systems.


The MXH932 card has a quad SFF-8644 cable connector and supports PCIe 4.0 cables. The card supports the PCI-SIG CMI (Cable Management Interface ) protocol as defined in the current PCI-SIG External Cable specification 3.0. When the MXH932 is used in conjunction with PCIe 4.0 cables, it can connected to any compliant downstream device.

The MXH932 is carefully designed for maximum cable lengths. Fiber optics extends this distance to 100 meters. More info on cable alternatives for the MXH932 card.


The MXH932 uses an on-board DIP-Switch to select between Host and Target operations and to set other operational parameters. The adapter cable port can be configured as four x4, two x8 or one x16 PCIe 4.0 connections.

eXpressWare Board Management Software

The MXH932 Adapter card comes with the optional eXpressWare Board Management software for simplified monitoring and management. For more information on Dolphin board management software visit here.

PCI Express NTB

The MXH932 card is a transparent product only. To utilize the Dolphin's PCIe NTB eXpressWare clustering software, you need to purchase the MXH930 PCIe Gen4 NTB adapter card.


  • PCI Express® 4.0 compliant - 16.0 GT/s per lane
  • Link compliant with Gen1, Gen2, Gen3 and   Gen4 PCI Express
  • PCIe 4.0 cables
  • Quad SFF-8644 x4 Gen4 PCI Express NTB cable ports that can be configured as:
    • One - x16 PCI Express port
    • Two - x8 PCI Express ports
    • Four - x4 PCI Express ports
  • Supports both copper and fiber-optic cables
  • Host clock isolation support
  • Low profile PCI Express form factor
  • Dual EEPROM / Flash for safe custom system configuration
  • Link status LEDs through face plate
Feature Description
Link Speeds 64 Gbit/s per port, total 256 Gbit/s
Cut through latency 100 nanoseconds
Active Components Microchip Switchtec® Gen4 PCI Express Switch
PCI Express® Base Specification4.0
External Cabling Specification Spec 4.0

One x16 connection
Two x8 connections
Four x4 connections

Switch topologies using MXS924

Cable Port Quad SFF-8644 / Four x4 Gen4 Ports
Supported cables

PCIe 4.0 cables
PCIe 4.0 fiber optic cable

Maximum power rating 12 Volt: max 1.66A (no port power) 2.86A (max port power)
+3.3 Volt: Not connected
+3.3 Volt Aux: max 100mA
Typical power rating 12 Volt: 1.5 A (no port power)
+3.3 Volt: Not connected
+3.3 Volt Aux: max 100mA
PCIe Bracket Full height plate mounted
Half height plate included
Mechanical Dimensions Low profile, Half length 167.65mm- (6.6 inches) x 68.90 mm (2.731 inches)
Operating Environment Operating Temperature: 0°C - 55°C (32°F - 131°F)
Airflow : 350 LFM (Preliminary)
Relative Humidity: 5% - 95% (non- condensing)
Storage Environment Storage Temperature: -40°C - 70°C (-40°F - 158°F)
Relative Humidity 95% (non- condensing) at 35°C
Software No software needed
Configuration DIP-Switch
Host / Target / x4, x8, x16 Link, safe boot
Regulatory approvals CE Mark
FCC Class A
RoHS compliant
UL94V-0 compliant
Regulatory EMC tests EN 55032:2012
EN 55035:2017
EN 61000-3-2:2014
EN 61000-3-3:2013
47 CFR Part 15, Subpart B (Clause 15.107 and 15.109) in conjunction with ANSI C63.4:2014
CISPR 35:2016 Edition 1.0 (CISPR/I/412/CDV) Korean Harmonized standard, KN 35
Operating Systems Basic operations - All

MXH930 - NTB Host + Transparent Host + Target functionality Dolphin eXpressWare software license

MXH932 - Transparent Host + Target functionality only

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