4U Expansion Enclosure

4U 19-slot RM Expansion Enclosure, PCIe 2.0

For OEM customers only.

Please call the factory for pricing information.

Please see Appliances for this product preconfigured.


The 4U rackmount expansion system cables to a host system with a PCIe x8 cable adapter and cable and contains seventeen PCIe x4 Gen 2 slots and two PCIe x8 Gen 2 slots with a 1300W power supply.

SKU: OSS-PCIe-4U-EXP-2022-x8-1300
Weight: 56 lb

The 4U rackmount expansion system makes it extremely easy to add up to nuneteen additional slots to your existing PC. The Gen2 system sends and receives data transaction at 40Gb/s simultaneously using the PCIe x8 connection and a 1300W power supply.

PCIe Backplane 17 PCIe x4 slots (x16 mechanical), 2 PCIe x8 slots (x16 mechanical)
Expansion Link Board Can use either PCIe x4 and x8 cables Switch puts out PCI Express 20 lanes to backplane Lanes are auto configurable to backplane or can be user configured Lane active LEDs on slot cover
Host Interface Board PCIe x8 cable adapter Installs in I/O slot of a host PC
  • 19”W x 25.4”D x 7”H
  • 1300W ATX power supply
  • Three external 5.25" drive bays One internal 3.5" drive bay
  • Metal locking door
  • 3 high-power cooling fans
  • 4 USB ports on front panel
Agency Compliance

Designed to meet:

Warranty Information:

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: support@onestopsystems.com or 877-438-2724