The Piston is built around a pico BTX motherboard, featuring Intel's 915G chipset. It supports Intel P4 Prescott processors up to 3.8 GHz, and either an embedded graphics solution, or a PCIe x16 graphics card. It supports two DDR 333/400mhz DIMMs, and includes on-board 7.1 audio.
The motherboard sits in the middle of the cylinder, and the storage drives are mounted underneath. The system supports one standard 3.5" SATA or IDE drives, and one optical drive (DVD or CD).