A form factor for solid state drives (SSD) without a shell like classic SSD's. Typically 22mm wide, and either 42mm, 60mm, or 80mm in length. Utilize either SATA or PCI Express BUS types.

A form factor for solid state drives (SSD) without a shell like classic SSD's; just a circuit board with NAND modules (may be single- or double-sided) and a controller chip. Typically 22mm wide, and either 42mm, 60mm, or 80mm in length. These utilize multiple BUS types, including SATA and PCI Express.