Rackmount Thunderbolt 2 to Quad PCIe Expansion Chassis



As technology advances, computer hardware manufacturers are putting more stress on the computers computing power performance and I/O speeds. Technological advances result in superior design and smaller form factor of desktop, workstation, and laptop computers. With the lake of internal expansion in the new computers,

Rocstor’s Thunderstor XR4 Rackmount is a perfect solution for users that demand a solid expansion chassis in a rack without forgoing any I/O performance. Rocstor’s Thunderstor expansion chassis are made in USA and are designed for professionals that demand quality. Video professionals and post-production houses are facing unprecedented challenges. As media technology continues to evolve, projects are getting larger and more complex. It has become necessary to connect multiple cards such as HBA, RAID, or video cards to a Mac© via Thunderbolt™ connection.


  • Rackmount expansion chassis form factor
  • Four x16 (mechanically, x4 electrically) PCIe Slot. Supports PCIe cards, up to full-height and half-length peripherals.
  • Two Thuderbolt 2 ports for Daisy chaining up to six devices to a single port on a computer
  • USA designed and made. TAA compliant
  • PCIe Expansion cards with computers without PCIe Slots
  • Ultra-quite with virtually no sound using a 84 watt power supply

The Thunderstor XR4 Rackmount expansion chassis supports all compatible PCIe cards, up to full-height and full-length peripherals. It provides extra DC power connections for GPUs requiring those connections.

The Thunderstor XR4 offers four full-bandwidth PCIe slots, using two independent Thunderbolt™ 20Gbps bridge circuits: One Thunderbolt Bridge drives two slots, and a second internal Thunderbolt bridge drives the other two slots. Connections to the host Mac Pro include using two of the three available Thunderbolt bus connections to the Mac. Daisy-chain expansion beyond the Thunderstor XR4 is also available via its four Thunderbolt expansion ports. .

The advantage of this architecture is enhanced operating bandwidth for demanding applications which will utilize all the 20Gbps bandwidth available from each Thunderbolt port.

Rocstor’s vision for professional users solves expansion issues by providing a series of PCIe to Thunderbolt 2 expansion chassis, cutting-edge solutions all built upon industry’s PCIe open and extensible platform. Our solutions enable you to very easily install Four x16 (mechanically, x4 electrically) PCIe card in Thunderstor XR4 and then use your Thunderstor XR4 via fast Thunderbolt 2 connection to a host computer. Thuderstor XR4 provide you with Four 20Gbs Thunderbolt 2 I/O ports so other compatible Thunderbolt devices can be daisy-chained. US designed and made, Thunderstor XR4 combines an ultra-quite 460 watt power supply with a rugged powder coated finish in a rackmount chassis.


Rackmount Thunderbolt 2 to Quad PCIe Expansion Chassis

Unit Physical Characteristics
Color: High-Gloss Black
Length: 16”
Width: 11”
Height: 7”
Weight (Approximate):18 lbs (not including installed PCIe peripheral cards)

PN Model Size
T55XR4-01 Thunderstor XR4 No Drives


Specification Brochure:
Specification Brochure (click here)

User Manuals:
User Manuals (click here)

Quick Installation :
Quick Installation Download (click here)