Compute Blade – A Rack-mountable PoE-powered Raspberry Pi CM4 carrier board with an NVMe SSD (Crowdfunding)

Uptime Lab Compute Blade is yet another Raspberry Pi CM4 carrier board, but it’s kind of unique with its long design designed to be mounted in racks and the board features an M.2 socket for an NVMe SSD plus an Ethernet port with PoE+ support.

The board is designed for high-density, low-power consumption, plug-and-play blade servers for home and data-center use and users can build Home labs, edge servers with lower latency than cloud services, and CI/CD systems (build farms) for testing and software development.

Compute Blade Raspberry Pi CM4 rack

Compute Blade specifications:

  • SoM – Raspberry Pi CM4 support and potentially alternative system-on-modules such as Radxa CM3 and Pine64 SoQuartz
  • Storage
    • NVMe SSD socket up to 22110 (2230, 2242, 2260, 2280 also supported)
    • Optional MicroSD card slot
  • Video Output – Optional HDMI port up to 4Kp60
  • Networking – Gigabit Ethernet RJ45 port with PoE+
  • USB
    • USB Type-C port to flash the bootloader, eMMC/SD card, and tests
    • Optional USB Type-A port for a flash drive copying data during setup with UART or YubiKey keys during operation.
    • Switch for USB input (USB-A or USB-C)
  • Debugging – 3-pin and 4-pin UART0 headers for serial console
  • Security – Optional TPM 2.0 on-board
  • Misc
    • Programmable button on the front panel
    • 2x RGB LEDs
    • Activity, Power, and SSD LEDs
    • PRIBOOT button used in conjunction with the USB Type-C port
    • PWM fan connector for the custom backplane (Fan Units), supports UART communication.
    • Optional 3-way DIP switch for WiFi, Bluetooth, and EEPROM write-protection
  • Optional modules and accessories
    • Real-time clock (RTC) module
    • Zymbit ZYMKEY4i, or custom module for Zymbit Hardware Security(HSM)
    • Enclosure options suitable for home, office, data centers…
    • Fan Unit
  • Power Supply
    • 24 or 48V Power over Ethernet IEEE 802.3at (PoE+) up to 30W
    • 5V via USB-C port
    • 5V via header
    • Consumption – normal operation: 2-8W; max: up to 22W
  • Dimensions – Depth: 340mm

Raspberry Pi CM4 Blade server board

Compute Blade heatsink
Custom designed heatsink

The Compute Blade runs Raspberry Pi OS, provided you are using a Raspberry Pi Compute Module 4, and the documentation is shared on Google Doc which is a bit unusual as I’m more used to GitHub wiki, standard wikis (e.g. mediawiki), Readthedocs website, or other solution that can more easily be found by browsing the web.

Three models of the Compute Blade are available: Basic, TPM, and Dev with different options.

Basic TPM Dev

Jeff Geerling tested an early version of the Compute Blade last year, but he also upload a more recent video showcasing the Compute Blade and discussing other potential solutions from Pine64 and others, but none of those are working very well at this time, and he recommends going with the Blade + CM4 at this time.

The Compute Blade is now available on Kickstarter and raised close to $700,000 US so far in the first few days quickly surpassing its 486,000 Euros funding goal. Rewards start at $64 for the Compute Blade Basic and $107 for the Dev module with all options. The TPM model is not offered on Kickstarter, but there are also clusters with enclosures, fans, and required accessories up to a 19-inch rack cluster with 20 Compute Blades (2x Dev + 18x Basic) fitted with CM4 8GB module for a little over $4000. Shipping costs will be added before delivery scheduled to start in August 2023 if everything goes accordingly to plans.

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