Disclosed is a modular server that allows for the simple replacement of the system board, memory and key network components in a single system tray to form a system module. The system module is connected to a storage plane with hard drives through a mid-plane with power and data channels. The system module can be easily replaced or upgraded independently of the mid-plane and storage plane. This extends the life cycle of the server chassis and associated components such as hard drives and power module when upgrading, resulting in overall savings for the owner of this system.