eBox 4
Modular PCIe 5.0 Expansion
eBox 4 delivers the flexibility from deployments to validate concepts, accelerate development, and test system functionality. Add PCIe slots how, where and when you need them.
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Scalable COTS PCIe 5.0 networking
eBox 4 is a cost-efficient and scalable PCIe 5.0 expansion platform purpose-built for off-the-self implementation in high-performance systems with demanding workloads. Add PCIe 5.0 I/O slots where and when you need them inside eBox 4’s 4U 19” rack-mountable chassis.
Paired with Dolphin’s portfolio of passive PCIe 5.0 backplanes, the expansion system can be configured to accommodate up to eight PCIe 5.0 I/O cards per eBox. All PCIe slots are backwards compatible with PCIe devices 1.0 through 5.0. This flexibility makes eBox 4 ideally suited for embedded systems, rapid prototyping and hardware-in-the-loop (HIL) workflows and much more.

Configure eBox 4 to fit your system needs
PCIe I/O cards installed in the eBox 4 will perform as if they were installed in the host system itself - no special software required. The eBox 4 expansion chassis can be placed up to 200 meters away from the host system, when deployed with a Dolphin host and target adapters.
PCIe Hot-Add
Dolphin’s eXpressWare and selection of PCIe NTB host adapters adds even more capabilities, with powerful features like Hot-Add, Device Lending, multicast and many more. Combine your desired number of PCIe 5.0 uplink- and I/O slots with the appropriate Dolphin NTB adapter to create a powerful expansion platform that answers your needs.
eBox 4 offers endless configurability and can expand the possibilities of your system. Dolphins range of PCIe rack mount switches enables the ability to connect multiple eBoxes together to create a near-limitless, scalable platform to fit any use case. Share devices, resources and functionality across multiple hosts and distances. Expand compute, hot-add I/O, accelerate workloads on demand - and scale as needed.
Dolphin PCIe host & target adapter cards
Dolphin offers a wide variety of PCI-SIG compliant PCIe host and target adapter cards, catering to any and all PCIe interconnect and expansion needs. Choose between cards offering SFF-8644, 8614, CDFP and MPO cable connectors, PCIe generation 3.0, 4.0 or 5.0, as well as cards with transparent bridging or non-transparent bridging (NTB).
Customers can specify the uplink card meeting the performance and distance requirements - please check out the list of Compliant Adapter Cards
Board Management software
The optional Dolphin Board Management Software for Linux and Windows systems is available for all cards. It supports PCIe inband monitoring of fans, error statistics, product temperature sensor, and firmware upgrades.
Our PCIe NTB host adapters include a perpetual license to Dolphin eXpressWare, our complete software suite for PCI Express. eXpressWare adds industry-leading functionality to your system, including Hot-Add, and our unique Device-Lending for IO migration and sharing and more.


eBox 4 Key Features
- Cost-efficient & flexible
- Choice of PCIe 3.0, 4.0 or 5.0 uplink adapter
- 0.5 - 200 meters distance
- Copper or Fiber optic cables
- PCIe 1.0 – 5.0 compatible
- Ultra-low latency
- Native performance
- Optional eXpressWare software features
- Dolphin board management
- Hot-Add Functionality
- Device Lending
- Multi-Chassis Scaling using MXS924 switch
- 4U Rack-Mount Chassis
- 1000W ATX PSU
- Active cooling w/ particle filter
- Optional Rack Mount Slides
Choose your eBox 4 expansion configuration
eBox 4 comes in a variety of configurations to best suit your needs. Each configuration utilizes one or more of Dolphin’s three passive PCIe 5.0 backplanes, with a total of 2, 3 or 5 PCIe slots, each of which includes its own PCIe 5.0 uplink slot.
Dolphin offers a selection of five configurations as standard, all with the same 4U chassis, 1000W ATX power supply and backwards compatible PCIe 5.0 slots. For inquiries regarding custom eBox 4 configurations, please utilise the form below.
MXE520A0: Single 2-slot backplane
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MXE52DD0: Dual 5-slot backplanes
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MXE520C0: Single 3-slot backplane
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MXE52AD0: 2-slot + 5-slot backplanes
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MXE520D0: Single 5-slot backplane
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For inquiries regarding custom eBox 4 configurations, please utilize the form below |
More information about eBox 4
Leave your contact details below if you would like to be contacted with more information about eBox 4 and Dolphin’s PCIe expansion solutions.
