Technical Specifications

Mac, Windows, and Linux Logos


Mac Compatibility

  • Mac Pro 14,8 (2023)
  • macOS 13 - macOS 14
  • x16 Slot 1 or 2 (recommended slots)
  • Mac Pro 7,1 (2019)(1)
  • macOS 10.15 - macOS 12(1)
  • x16 Slot 3, 4, or 5 (recommended slots)
  • Mac Pro 5,1 (2010 & 2012)(2)
  • macOS 10.13 - macOS 10.14
  • x16 Slot 2 (recommended slot)
  • Thunderbolt PCIe Card Expansion System
  • macOS 10.13 - macOS 14
  • x16 Full-length (recommended slot)

Windows Compatibility

  • Windows computer with available full-length, full-height x16 PCIe slot (PCIe 4.0 slot preferred; PCIe bifurcation not required)
  • Windows 11 and 10
  • Windows Server 2022, 2019

Linux Compatibility

  • Linux computer with available full-length, full-height x16 PCIe slot (PCIe 4.0 slot preferred; PCIe bifurcation not required)
  • Linux Kernel 5.0+

Thunderbolt Compatibility

  • With card installed in a Thunderbolt expansion system with full-length x16 PCIe slot
  • Any Mac, Windows, or Linux computer with Thunderbolt

Power Requirements

  • When seven or eight SSDs are installed on the M.2 8x4 Silent Gen4 PCIe Card, connecting the included 6-pin PCIe auxiliary power cable between the computer’s and the card’s power connectors is  required (optional when up to six SSDs installed).

M.2 NVMe SSDs Compatibility(3)

  • For a list of compatible M.2 NVMe SSDs, see the following PDF
M.2 NVMe SSDs Compatibility PDF Download Link


Part Number

  • FUS-SSD-8X4-E4S


  • 2-year

Form Factor

  • Full-length, full-height computer card

Internal Connectors

  • Eight M-keyed (NVMe) M.2 sockets
  • 6-pin PCIe auxiliary power connector

SSDs Supported(3)

Boot Support (From a Single SSD)

  • macOS
  • Mac Pro 5,1 or Mac Pro 7,1
  • Any Thunderbolt Mac
  • Windows, Linux
  • Computers with UEFI BIOS

RAID Support

  • macOS, Windows, Linux
  • RAID 0, 1, and 10

NVME Support

  • Yes

SSD Power/Activity Indicators

  • Yes

S.M.A.R.T. Status Data Reporting Support

  • All SSDs

RoHS Compliant

  • Yes

Package Contents

  • Sonnet M.2 8x4 Silent Gen4 PCIe Card
  • Thermal transfer pads
  • 6-pin to 6-pin auxiliary power cable for Mac Pro
  • Documentation

Support Links

Support Knowledge Base

Documentation and FAQs

Product Manual

Sonnet M.2 8x4 Silent Gent4 PCIe Card Manual PDF Download Link

Technical Notes

  • macOS 13 and macOS 14 do not currently support NVMe SSDs installed in a PCIe slot of the Mac Pro 7,1 (2019). Sonnet is working with Apple to resolve the issue.
  • See this Mac Pro installation video for instructions to install a full-length PCIe card in the Mac Pro 5,1.
  • You may install any number of SSDs now and add more later without needing to reformat existing ones. This product’s performance will vary based on the type and number of SSDs used, the CPU speed, and the PCIe architecture.

Sonnet M.2 8x4 Silent Gen4 PCIe Card