Technical Specifications

Mac, Windows, and Linux Logos


Mac Compatibility

  • Mac Pro 14,8 (2023)
  • Mac Pro 7,1 (2019)
  • macOS 13+
  • macOS Sonoma compatible

Windows Compatibility

  • Windows 11 and 10
  • Windows Server 2022, 2019

Linux Compatibility

  • Linux Kernel 5.0+

Thunderbolt PCIe Expansion System Compatibility

  • Mac computer (M series and Intel) with Thunderbolt port via a Thunderbolt to PCIe card expansion system
  • Windows computer with Thunderbolt port via a Thunderbolt to PCIe card expansion system
  • Linux computer with Thunderbolt 4 port via a Thunderbolt to PCIe card expansion system


Part Number

  • G25E-2X-E3


  • 2-year

Form Factor

  • Low-profile PCIe 3.0 x8 card
  • PCIe x4 slot supports one port at full bandwidth
  • PCIe x8 slot supports two ports at full bandwidth

External Connectors

  • Two SFP28 optical transceivers

25GbE Controller

  • Mellanox ConnectX

Network Support

  • 25Gb/s
  • 10Gb/s

Teaming (Link Aggregation)

  • macOS
  • Link Aggregation provides balanced network traffic and automatic failover
  • Windows 11* and 10*, Windows Server, and Linux
  • Teaming doubles transfer speeds up to 50Gb/s
    * Get Sonnet software to create a Team in Windows 11 or 10


  • Maximum packet size: 9000 bytes (jumbo frames)

Advanced Features

  • Flow control support
  • MSI (Message Signaled Interrupts)
  • RSS (Receive-Side Scaling)
  • Multicast filtering
  • 64-bit address support for systems using more than 4GB of physical memory
  • Wake-on-LAN not supported

Stateless Offloads

  • TCP, UDP, and IPv4 checksum offloading
  • TSO (TCP Segmentation Offload, AKA Large Send Offload)(3)
  • TRO (TCP Receive Offload)


  • RoHS 3 (Directive 2015/863)
  • IEC62368-1 and IEC62368-2 Safety

Package Contents

  • Twin25G PCIe Card
  • Two PCIe mounting brackets
  • Documentation

Support Links

Support Knowledge Base

Drivers, Documentation, FAQs

Product Manual

Twin25G PCIe Card Manual PDF Download Link

Twin25G PCIe Card