Computing device manufacturers are often driven to minimize power supply capabilities supplied with a device to that required to operate the device. The disclosed computing devices include a system chassis and a removable power module. The removable power module includes a power supply that rectifies received AC power to a quantity of DC power sufficient to operate both the removable power module and the system chassis. The removable power module may also include a performance enhancing component that may be used to upgrade the performance of the device. As each removable power module includes the power supply for the entire device, the power supply within each removable power module may be tailored to provide the power necessary to operate both the removable power module and the system chassis.