A modular computer system, comprises a casing, wherein the casing is an enclosed structure having an exterior and an interior; at least one slide groove, wherein the slide groove is integrated into the interior of the casing; a motherboard, wherein the motherboard is secured within the at least one slide groove; an opening in the exterior permitting a hard drive to be inserted through the opening so that the hard drive extends into the interior and electrically connects it with the motherboard via a Serial ATA (SATA) connector positioned to permit the connection; and a power supply electrically connected to the motherboard. The at least one slide groove permits the motherboard to slide out from the interior during servicing.