Xerxes Pi – A Raspberry Pi CM4/CM5 carrier board with a rack-friendly design (Crowdfunding)
Designed by Rapid Analysis in Australia, the **Xerxes** **Pi** is a cross-vendor compute module carrier board that fits into a 1U rack and supports Raspberry Pi CM4/CM5, Radxa CM5, Banana Pi CM4/CM5, and Orange Pi CM4/CM5 compute modules. Designed at just one-third the size of a Nano-ITX board (120 × 40 mm), it’s ideal for home lab and small business servers looking for a low-cost way to run Docker containers and other open-source software.
For storage, the carrier board includes a microSD card, and an M.2 E-Key slot enables support for accelerators or peripherals. Additionally, it features an I²C/SPI header and optional PoE via add-on boards or splitters. The design is well thought out and comes with a thermally efficient design with ventilated enclosures, optional PLA or metal heatsinks, and open-source 3D printable rack cases (single or multi-board). With open schematics, 3D files, Xerxes Pi targets DIY electronics, clustered computing, edge servers, and educational setups.
Xerxes Pi carrier board specifications:
* Supported modules – Raspberry Pi CM4/CM5, Radxa CM5, Banana Pi CM4/CM5, Orange Pi CM4/CM5
* Storage – MicroSD card slot
* Networking – Ethernet with optional Power-over-Ethernet (via shield board or external splitter)
* USB – USB Type-C port for power
* Expansion
* M.2 E-Key slot for accelerators or peripherals
* I²C, SPI (rear pin headers)
* Power
* Standard power input via headers or USB-C
* Optional PoE module (14 W or 30 W versions)
* Dimensions – 120 × 40 mm (one third the size of a Nano-ITX board)
The device is designed for in-house hardware and software developers, so it should be able to run Raspberry Pi OS, Ubuntu Server, and other Linux distributions depending on the selected system-on-module. With that, you can run containerized workloads with Docker and Kubernetes, host open-source servers, and deploy edge applications such as AI inference or lightweight virtualization.
For theremals, the company processes a ventilated enclosure with a low-cost thermally conductive extruded heatsink or high-end aluminium heatsinks for better cooling under heavier workloads. We have written about many carrier boards for Raspberry Pi CM4/5 and compatible SoMs over the years, but rack-friendly boards are unusual, and the Compute Blade is the only example we can think of.
Xerxes Pi Cluster Xerxes Pi running on PoE power from a Ubiquiti EdgeSwitch 8 using a cheap Alibaba PoE USB-C Splitter
Based on the project’s description, the Xerxes Pi campaign has three main stretch goals that will be unlocked as more funding is raised. At the time of writing, the first goal of $10,000 has been reached, so the company has released heatsink 3D models and enclosure files on printables. If the project reaches $20,000, the company will release different color options for the single Xerxes Pi enclosure and the final prototype for the POE board. If the final and most ambitious goal of $50,000 is reached, the company will release open-source plans for a full-sized 19-inch 1U rack and introduce an Oculink-based M.2 GPU module, while also reducing global shipping costs for all backers.
The Xerxes Pi carrier board is available on Kickstarter starting at AU$49 (~US$32) for the bare carrier board. Bundle options include the wingman kit, which includes a PLA or aluminium heatsink and case and costs around AU$55–65 (US$36 – 43). For clustering, the x6 Pro bundles include six boards, heatsinks, and a 1U rack enclosure, with options for plastic or metal cooling and optional POE boards, and cost around AU$245 – AU$340 (US$159 – 221). Finally, the enterprise bundle with six boards, six PoE modules, metal heatsinks, and a fully assembled 1U rack case goes for AU$464 (~US$302). Shipping is scheduled to start next month (September 2025).
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Debashis Das
Debashis Das is a technical content writer and embedded engineer with over five years of experience in the industry. With expertise in Embedded C, PCB Design, and SEO optimization, he effectively blends difficult technical topics with clear communication
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