The M120 Raptor 1U by Core Systems is THE most rugged 1U rackmount computer on the market today! The ultra sturdy all aluminum chassis supports dual shock mounted hot swap drives and a shock mounted DVDRW. All internal cabling is customized and secured to the chassis to optimize airflow and system cooling. The M120 supports the latest Intel Quad and Hexa-core CPUs while providing one open PCIe slot on the rear of the chassis. The additional PCIe feature card is secured to the chassis via a proprietary card hold down system. Each M120 rugged system is truly engineered to perform.