Xerxes Pi 2026 Carrier Board for Raspberry Pi CM4/CM5 Modules

Imagine a world where powerful computing is not confined to bulky towers or fragile laptops, but instead resides in a slender, elegant strip of circuitry no larger than a standard smartphone. This is the philosophy behind the Xerxes Pi 2026 carrier board, a compact solution crafted by Rapid Analysis that redefines what we expect from embedded systems. Measuring just 120 by 40 millimeters, this board is designed with a vertical orientation in mind, allowing it to slot neatly into a standard 1U rack. This form factor is not merely an aesthetic choice; it is a deliberate engineering decision that maximizes density in server rooms and industrial environments where space is at a premium. By standing upright, the board minimizes its footprint while maintaining accessibility, creating a modular approach to computing that feels both futuristic and practical.

At the heart of this system lies the concept of the System on Module, or SoM. Rather than soldering a processor directly onto the board, the Xerxes Pi 2026 utilizes two high-density, 100-pin mezzanine connectors. These connectors serve as the bridge between the carrier board and the compute module itself. This design supports Raspberry Pi Compute Module 4 and Compute Module 5, as well as compatible alternatives. Think of the compute module as the brain and the carrier board as the nervous system and body. This separation allows users to upgrade their processing power without replacing the entire infrastructure. If a new generation of processors emerges, one can simply swap the module, leaving the robust connectivity of the carrier board intact. It is a sustainable approach to technology that reduces electronic waste and future-proofs investments.

Storage is often the bottleneck in embedded systems, but the Xerxes Pi 2026 addresses this with sophistication. Tucked underneath the main circuitry is an M.2 M-key socket that supports PCIe Gen 2 x1 NVMe solid-state drives. For those unfamiliar with the terminology, NVMe is a protocol designed specifically for high-speed storage, allowing data to be read and written much faster than traditional methods. By placing the drive underneath, the board maintains its slim profile while offering the performance benefits of modern solid-state technology. Additionally, a MicroSD slot is provided for those who prefer the simplicity and portability of flash memory cards, ensuring flexibility for various use cases, from quick prototyping to long-term deployment.

Connectivity is where this board truly shines, particularly in its networking capabilities. It features a Gigabit Ethernet port powered by the Broadcom BCM54210PE chipset. This is not just any network port; it offers optional support for Power over Ethernet, or PoE, including the higher-power PoE+ standard. PoE technology allows a single Ethernet cable to carry both data and electrical power to the device. This eliminates the need for separate power adapters, simplifying installation and reducing cable clutter. For users who prefer traditional power sources, the board also accepts 5V power via a USB Type-C connector. A clever jumper bridge allows users to select between PoE and USB power, providing a fail-safe mechanism and ensuring that the system can operate in environments where only one power source is available. The USB Type-C port also serves a critical role in maintenance, facilitating boot and recovery operations for the compute module.

Expansion and peripheral support are handled through a variety of thoughtful interfaces. The board includes SH-series Qwiic connectors, which are designed for easy daisy-chaining of I2C and I2S peripherals. These connectors simplify the addition of sensors, displays, and audio components, making the board ideal for Internet of Things applications. Furthermore, a dedicated mezzanine expansion connector exposes CSI and HDMI signals. CSI, or Camera Serial Interface, allows for high-bandwidth camera connections, while HDMI enables high-definition video output. This combination makes the Xerxes Pi 2026 suitable for multimedia projects, security cameras, and digital signage, where both visual input and output are required.

For developers and engineers, debugging is a crucial part of the development cycle. The board includes a dedicated SH-series serial debug connector, providing direct access to the system’s console. This allows for real-time monitoring of system messages and error logs, which is invaluable when troubleshooting complex software issues. Additionally, boot jumper pins are provided to control the startup behavior of the compute module, giving users granular control over the boot process. Status LEDs for power, activity, and network connectivity provide immediate visual feedback on the system’s health, allowing for quick diagnostics without the need for external tools.

Thermal management is another critical aspect of high-performance computing. The Xerxes Pi 2026 supports active cooling through a standard PWM fan connector. Pulse Width Modulation allows the system to dynamically adjust the fan speed based on temperature, ensuring quiet operation when idle and maximum cooling when under load. This balance between performance and noise is essential for office and home environments where silence is valued.

Software compatibility is broad and robust. The board works seamlessly with Raspberry Pi OS and Ubuntu Server, as well as other operating systems supported by the underlying compute modules. To further enhance the user experience, Rapid Analysis provides a macOS management application. This tool offers SSH monitoring and Docker container management, allowing users to oversee their fleet of devices from a single interface. This level of software integration lowers the barrier to entry for managing distributed systems, making advanced server management accessible to a wider audience.

The project is rooted in the open-source community, with KiCad design files available on GitHub. This transparency allows hobbyists, educators, and professionals to understand the inner workings of the board, modify it for specific needs, or learn from its design. The launch price on Kickstarter starts at 49 USD for the Gadgeteer package, which includes the board, PoE accessories, and heat sinks. This pricing strategy reflects a commitment to making advanced embedded computing accessible, offering a powerful, compact, and versatile platform for innovation. The Xerxes Pi 2026 is not just a circuit board; it is a gateway to a new era of modular, efficient, and connected computing.