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EB3T Auxiliary Power Connectors

ExpressBox 3T

(3) Slot Thunderbolt™ 2 PCIe Expansion

Make your workstation mobile, and take your PCIe cards anywhere. The ExpressBox 3T can transform both computers and laptops, with Thunderbolt™ connection, into powerful workstations.

Weight: 11 lb
Ships In: 
1-2 weeks

ExpressBox 3T
ExpressBox 3T provides an ‘outside-the-box’ solution for using PCIe cards with Thunderbolt™ 2-equipped computers. High-performance work flows are possible by connecting a Thunderbolt 2-equipped computer to a Thunderbolt™ 2 expansion chassis containing PCIe cards such as video capture, media transcoding, audio processing, and fast data storage. And because Thunderbolt™ 2 is also based on DisplayPort technology, you can daisy chain a high-resolution display with yournMagma ExpressBox 3T.


  • Supports (3) full-length PCI Express cards
  • Attach PCIe cards to Thunderbolt™ 2-enabled computer
  • Extension of PCI Express signals outside the computer
  • Daisy-chain or end-point device
  • Thunderbolt™ 2 features speeds up to 20Gbps


  • Easy Plug and Play installation
  • Use any combination of x1, x4, x8 and x16 PCIe cards
  • Hot-swappable cooling fan
  • Works with Mac OS X 10.6.8 or higher and Windows 7 and 8
  • Additional blower for extra hot cards
  • Optional built in drivebay for up to four (4) 2.5″ SSD or SAS/SATA drives
  • 250W power supply with (2) auxiliary power connectors



Thunderbolt 2 to PCIe Expansion - 3 Slot



  • (3) Full-Length PCI Express Slots (Compatible with ALL of card lengths: 1/2 length, 3/4 length and full length)
    • One x8 PCIe (slotted to accomodate x16 card
    • One x8 PCIe
    • One x4 PCIe

Thunderbolt (sold separately)

Interconnect Bandwidth 20 Gbps Bi-directional
Hard Drive Support

Optional built in drivebay for up to four (4) 2.5" SSD or SAS/SATA drives(when using the drivebay, maximum card length is limited to 8.5")

Material Aluminum Chassis

14.6” L x 4.3” W x 7.9” H (371mm x 110mm x 200mm)

Weight 6.0lbs (2.72kg)
System Cooling
  • (1) Hot swappable fan
  • (1) Removable blower fan
Power Supply
  • 250W, 100-240 VAC, 50-60Hz
  • Two 4-pin auxillary power tabs
Ambient Temperature 0º to 50º C
Storage Temperature -20º to 60º C
Relative Humidity 5% to 85% non-condensing
Regulatory Compliance
FCC Class A Verified
RoHS Compliant
Supported Operating Systems
  • Windows 7, 8
  • Mac OS X Yosemite
30 Day Money Back Guarantee
1 Year Return to Factory
Partner Approvals
Package Contents
  • Power indicator
  • PCIe card slot opening
  • Thunderbolt 2 ports
  • Power cord socket
Hardware Included
  • Blower (if needed for cooling)
  • Carry bag
  • U.S. power cord

Warranty Information:

Support: support@onestopsystems.com or 800-438-2724