MXH932 Transparent Host & Target Adapter

Gen4 x16 PCIe Transparent Host / Target Adapter

The MXH932 Gen4 x16 PCIe Transparent Host / Target Adapter is our high performance PCIe IO product. Based on Microsemi 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 MXS824 24 port Gen3 PCIe switch.

  • One x16 PCIe edge port
  • Four x4 PCIe Cable ports
  • PCIe 4.0 or MiniSAS-HD 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 Gen4 Host/Target Adapter is our high performance transparent solution for connecting servers to external I/O subsystems. Based on Microsemi® 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 MiniSAS-HD cables as well as the new PCIe 4.0 cables. Using the MXH932 as both Host and Target, standard MiniSAS-HD cables enables basic transparent Host and Target operations including propagation of host reset signal to the downstream device.

The card also supports the new 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 connections.

eXpressWare Board Management Software

The MXH932 Adapter card comes with the optional eXpressWare Board Management software for simplified monitoring and management. The adapter also comes with optional support for SMbus and configuration via a Board Management Controller. 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 Gbps per lane
  • Link compliant with Gen1, Gen2 and Gen3 PCI Express
  • PCIe 4.0 or MiniSAS-HD® 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

Please contact Dolphin for details and availability

Feature Description
Link Speeds 64 Gbit/s per port, total 256 Gbit/s
Cut through latency 170 nanoseconds
Active Components Microsemi Switchtec® Gen4 PCI Express Switch
PCI Express® Base Specification4.0
External Cabling Specification Spec 3.0

One x16 connection
Two x8 connections
Four x4 connections

Switch topologies using MXS824

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

PCIe 3.0 cables
MiniSAS-HD copper cables
MiniSAS-HD fiber optic cable

Power Consumption 12 Volt : Max xx Watts
12 Volt : Max xx Watts including AOC
+3.3 Volt: Not connected
+3.3 Volt AUX: Max 1 Watt
PCIe Bracket Full height plate mounted
Half height plate included
Mechanical Dimensions Low profile, Half length 168.2mm- (6.6 inches) x 69.2 mm (2.7 inches)
Operating Environment Operating Temperature: 0°C - 55°C (32°F - 131°F)
Air Flow : 150 LFM
Relative Humidity: 5% - 95% (non- condensing)
Software No software needed
Configuration DIP-Switch
Host / Target / x4, x8, x16 Link, EdgeClockSelect, safe boot
Pending Regulatory approvals CE Mark
FCC Class A
RoHS compliant
UL94V-0 compliant
Operating Systems Basic operations - All

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

MXH932 - Transparent Host + Target functionality only

Evaluation boards available. Please contact Dolphin for more information.

  • MXH932 Product Brief (coming)
  • MXH932 Users Guide (coming)