A hardware enthusiast has designed a custom motherboard to breathe new life into an HP ProLiant N40L tower server from around 15 years ago. The replacement board is built around a Raspberry Pi Compute Module 5, which brings modern features the original system lacked, including NVMe storage support and USB 3.0 connectivity.
The original ProLiant N40L was known as a low-power home server, but its aging chipset and limited I/O made it increasingly dated. By swapping in a custom carrier board, the maker kept the tower's chassis and drive bays while upgrading the underlying compute platform. The CM5 module slots directly onto the new board, and the design adds an M.2 NVMe slot and USB 3.0 ports that the original hardware never had.
Because this is a single source, there are no differing accounts to compare. The report highlights the DIY nature of the project and the role of the Raspberry Pi CM5 in extending the usefulness of older server hardware.