ExpressBox 3450

HPC Five Slot Gen 3 Modular Expansion Chassis

The ExpressBox 3450 is the perfect chassis for accelerating workstations and servers with GPUs in size restricted applications.  Compact and powerful, the EB3450 can house four double-wide GPUs with an additional single-wide slot for other peripherals.

SKU: EB3450

Magma’s ExpressBox 3450 provides optimal GPU and other HPC peripheral expansion to existing host computer systems. Designed to support full Gen 3 x16 PCIe connectivity to all devices, the EB3450 is a perfect companion to both workstations and servers. Up to four double wide (e.g. GPU) and one single wide PCIe devices are supported through expansion.

The EB3450 supports fan speed control which allows the support of a variety of peripherals including workstation class GPUs for quiet deskside HPC. The EB3450 is ideal for media and entertainment, oil and gas exploration, finance, simulation and virtualization. Server class GPU devices are supported with higher airflow for data center applications. The EB3450 includes Magma’s Express I/O for system control, monitoring and alarming.

Expand the Power of your Workstation

  • Accommodates 4 double wide GPUs and one single wide peripheral
  • PCIe Gen 3 x16 (128Gbps) for all connections
  • Supports both workstation and server class GPUs
  • Designed for HPC peripherals (SSDs and GPUs)
  • Rack shelf and desktop compatible


  • Design optimized for GPU applications - concentrate your HPC investment in a chassis that will support full GPU performance utilization
  • Low-profile host card allows for easy installation into low-profile computers
  • Supports peer-to-peer transfers between cards in the expansion chassis to provide full bandwidth potential among I/O cards
  • Supports daisy-chaining of fan-out configuration of multiple expansion chassis


  • Passive host interface; no PCIe switch on host link cards provides lowest latency possible
  • Two 1200W/1500W hot swappable power supplies standard
  • Direct flow through air cooling for maximum cooling efficiency with fan speed control
ExpressBox 3450
  • One five slot backplane mounted in 1/2 19" rack width chassis; Supports up to 4 GPUs + 1 single slot device
  • Two 1200 W/1500W PSUs
  • Five peripheral slots and one host link slot
Interconnect Bandwidth
  • Host and all peripheral slots Gen 3 x16 (128Gbps)
Material Steel Chassis
Dimensions 8.5” Wide x 7” High (4U) x 20” Deep
Weight 43.5 lbs/19.7kg
Host Connection
Host side Any PCIe based host-equipped computer (preferably Gen 3 x16)
Expansion side All host links are Gen 3 x16 capable and will train down to Gen 2 or 1 as needed
  Switchless host link adapter design for minimal host/expansion latency
  1m or 2m cable lengths are supported for host interface
Power Supply
  1200W/1500W PSU
Additional Hot swappable 1200W@120V/ 1500W@240V AC power supplies may be ordered as spares
Ambient Temperature 0º to 50º C
Storage Temperature -55º to 125º C
Relative Humidity 0% to 90% non-condensing
Regulatory Compliance
FCC Class A Verified
CE Certified
RoHS Compliant
Supported Operating Systems
  • Windows 7, 8
  • Mac OS X 10.6.8 or higher
  • Linux
  • Solaris
30 day Money back guarantee
1 year (extendable) Return to factory
Package Contents
  • 4U ½ 19” rack enclosure
  • 5 PCI Express Gen 3 x16 slots
  • 1 Host Interface Slot
  • 2 Expansion cards (Expansion and Host)
  • Cooling Fans (Field Serviceable)
  • Hot Swap power supply modules (2400W)
  • Express IO Manager
  • PCIe expansion cable (1m or 2m); ordering option
  • Cable clamps

One Stop Systems warrants this product to be free of defects in material and workmanship for the warranty period purchased by the customer (1 to 5 years) from OSS beginning on the date of delivery to the original purchaser from OSS . During this period, One Stop Systems will, at its option, repair or replace this product at no additional charge to the purchaser, except as set forth in this warranty agreement. OSS will, at its option, repair or replace this product at no additional charge to the purchaser, if the defect is related to the OSS manufactured product. OSS is not liable for any defects in material or workmanship of any peripherals, products or parts, which OSS does not design or manufacture (third party products). OSS will honor the original manufacturer’s warranty on these products. One Stop Systems will analyze the defective component and the customer will be charged only in the following instances:

  • No problem found: $125(U.S dollars)
  • Damage Due to Negligence or Mishandling: Parts and labor at $75 per hour with a $100 minimum charge (U.S. dollars). Receipt of damaged goods voids the One Stop Systems warranty.

Repair parts and replacement products will be furnished on an exchange basis and will be either new or reconditioned. All replacement parts and products shall become the property of OSS, if such parts or products are provided under this warranty agreement. In the event a defect is not related to the OSS manufactured product or is not covered by the third party product, OSS shall repair or replace the defective parts at the purchaser’s cost and deliver the defective parts to the purchaser. This limited warranty shall not apply if the product has been misused, carelessly handled, defaced, modified or altered, or if unauthorized repairs have been attempted by others. The above warranty is the only warranty authorized by OSS and is in lieu of any implied warranties, including implied warranty of merchantability and fitness for a particular purpose. In no event will One Stop Systems be liable for any such damage as lost business, lost profits, lost savings, downtime or delay, labor, repair or material cost, injury to person or property or any similar or dissimilar consequential loss or damage incurred by the purchaser, even if OSS has been advised of the possibility of such losses or damages.

Depending on the warranty service level purchased, warranty service is obtained by advanced replacement when accompanied by a signed Warranty Service Agreement form or by delivering the product to an OSS authorized repair facility with all parts and accessories as originally shipped, along with the proof of purchase and a Returned Merchandise Authorization (RMA) number. The RMA number is obtained in advance from OSS Support or Customer Service Department and is valid for 30 days. The RMA number must be clearly marked on the exterior of the original shipping container or equivalent. Purchaser will be responsible and liable for any missing or damaged parts. Purchaser agrees to pay for shipping charges one way, and to either insure the product or assume the liability for loss or damage during transit.

Ship to: One Stop Systems



2235 Enterprise Street, Suite 110

Escondido, CA 92029

Support: or 877-438-2724


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