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ExpressBox 4 (1U)

ExpressBox 4 (1U)
ExpressBox 4 (1U) - Open Top/Open Slide
ExpressBox 4 (1U) - Front View
ExpressBox 4 (1U) - Open Slide
ExpressBox 4 (1U) - Power Cables
ExpressBox 4 (1U) - Open Front
x8 PCIe Host Card
1-Meter iPass Cable
ExpressBox 4 (1U) Power Module
ExpressBox 4 (1U) Fan
ExpressBox 4 (1U)
ExpressBox 4 (1U) - Open Top/Open Slide
ExpressBox 4 (1U) - Front View
ExpressBox 4 (1U) - Open Slide
ExpressBox 4 (1U) - Power Cables
ExpressBox 4 (1U) - Open Front
x8 PCIe Host Card
1-Meter iPass Cable
ExpressBox 4 (1U) Power Module
ExpressBox 4 (1U) Fan

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Install and remove PCIe cards without shutting down the server. ExpressBox 4 1U is the most reliable PCIe expansion solution designed for industrial environments where serviceability and availability features are required.

ExpressBox 4 (1U)

Magma ExpressBox 4-1U provides a rock-solid upgrade path to increase the number of PCI Express slots available to your server. You can maintain a consistent server configuration, while adding more I/O capacity and scalability with a Magma expansion chassis like ExpressBox 4-1U. Now, an almost unlimited number of PCIe cards can be attached to a single server. Moving PCIe cards outside the host computer to an expansion chassis allows server manufacturers to reduce the amount of power required in the server. 

ExpressBox 1

And, because ExpressBox 4-1U monitors temperature, power, and fans with alerts using SNMP and audible alarms, you can feel confident that your entire systems remains reliable, available and serviceable.

Maximize Limited Rack Space

ExpressBox 4-1U is the only expansion solution that provides four full-length PCI Express slots in a 1U rack-mount chassis and includes a hot-swappable redundant power supply and hot-swappable cooling fans. Additionally, the PCIe slots are hot-pluggable so you can replace a defective card without shutting down the system.

Easy Installation

ExpressBox 4-1U consists of a PCIe host card, a cable and 1U rack-mount enclosure. It is automatically configured by the system BIOS and all slots appear transparent to the host computer. ExpressBox 4-1U is designed to fit conveniently into a typical 4-post rack cabinet. Card retainers inside the enclosure keep your cards securely in place during transportation.

PCI Express Hot-Plug Support:

Easily remove and replace PCIe cards without powering downing the server

  • Initiate a hot-swap request without affecting the operation of the entire system 
  • Any of the PCIe cards can be stopped and replaced with a replacement card
  • All slots designed to protect the PCIe card electrically in the event of its surprise removal

PCI Express Hot-Plug Support:

  • Utilizes the SNMP protocol to monitor and report normal operation parameters as well as alerts and failure events 
  • Audible alert for over temperature, fan failure or power supply failure


  • Add four PCIe slots in only 1U of rack space
  • Attach full-length PCIe cards to servers with limited card space
  • Multiple expansion chassis can be daisy-chained
  • Keeps your I/O configuration consistent from server to server
  • Protects your investment in expensive I/O cards during server migrations and upgrades
  • Mission critical solution provides notifications of failures with SNMP trap and audible alarm
  • Minimize downtime by servicing problems immediately
  • PCIe Slots can be turned off without powering down system
  • Reduce power consumption and rack space


  • Automatically configured by the system BIOS
  • Automatic power-up control by computer
  • Easily visible LEDs indicate correct installation
  • High-speed x8 PCIe connection to server
  • Hot-pluggable PCIe slots support full-length cards
  • Slots support any combination of x1, x4, x8 and x16 PCIe cards
  • Sliding card carriage provides access to PCIe cards without removing enclosure from cabinet
  • Adjustable card retainers hold cards in place
  • SNMP agent monitors critical components and slots for power condition
  • Includes auxiliary power cables for high wattage cards
  • Hot-swappable fans and power supplies

EB4-1U-X8G2 4 Slot PCI Express Expansion System, 1U form factor
EB4-1U-x8G2-EXT Additional ExpressBox 4-1U for daisy-chaining
SUBCBL3IP: Substitute 3m iPass cable
SUBCBL7IP: Substitute 7m iPass cable
60-00038-01: Replacement 1m iPass cable
01-05990-00: Replacement hot-swappable fan module
40-00024-01: Replacement redundant power supply module
01-05996-03: Replacement auxillary power cable
01-04978-03: Replacement host card (x8 PCIe Gen2)
PCI Express Bus Specification Revision 2.0
PCI Hot-Plug Specification 1.1

4 PCIe slots (two on each side of backplane)
x8 PCIe Gen 2 slot speeds (x16 connectors)
Hot-Pluggable slots (75W per slot)
Use AUX power cable for higher wattage cards

NOTE: Hot plug features will be managed by BIOS instead of being managed by the Operating System. If the BIOS does not support Hot-Plug, then the hot-plug feature / capability on any Expansion units will not function at all

Host Card  
Low profile - x8 PCIe
1.25A @ +3.3V maximum

1-meter iPass included (3m or 7m optional)


Interconnect Bandwidth  
40Gbps (PCIe x8 Gen 2)  
1U Rack-mount  
19"W x 1.75"H x 28"D  
27 lbs or 12.27 kg  
24” pre-installed rack-slides  
System Cooling  
Three hot-swappable fans  
One fan in each power supply module  
Monitoring Features  
SNMP Version 1  
Audible Alarm for temperature, fan, power failure
Chassis Power Supply  
420 Watt Redundant, Hot-swappable
AC Input: 100-240 VAC, 50-60 Hz
AC Input Current: 6.0 Amps
12V @ 35 Amps
+5Vsb @ 3.0 Amps
Ambient Temperature 0º to 70º C
Storage Temperature -55º to 125º C
Relative Humidity 0% to 90% non-condensing
100,000 Hours
Regulatory Compliance  
FCC Class A Verified
CE Certified
RoHS Compliant
Supported Operating Systems  
30 day Money back guarantee
1 year return to factory
Package Contents  

ExpressBox 4 -1U - Top View
1. Four PCI Express slots
2. Cooling fans (Hot-Swappable)
3. Power supplies
4. iPass cable
5. PCIe host card
6. Adjustable PCIe card retainers




ExpressBox 4 -1U - Rear View
7. PCI Express card slot opening
8. iPass connector to host computer
9. iPass connector to daisy-chain expansion chassis
10. RJ45 Ethernet connection for SNMP
11. Power cord sockets




ExpressBox 4-1U - Front Panel
12. Hot-swappable fans
13. Status Indicators
14. Hot-swappable power supplies

ExpressBox 4 (1U) - Top View

ExpressBox 4 (1U) - Hardware

ExpressBox 4 (1U) - Front Panel and Rear View


"Apple has successfully launched an internal operations solution using the Magma 4 Slot PCI Express Expansion system. We will be using these in Xserves with two NVIDIA graphic cards, and a 4gbps Fiber Channel card. The second server slot will have a 10GbE network adapter installed in it. There will be 16 systems total, 12 in the ops center, 2 in the training lab, and 2 for backup/development work."


- Josh Moore; Systems Support Specialist, Apple

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