Athena Power RM-1U100DD is desgined for installing dual mini-ITX system motherboards. With it's unique interior arrangement, it is able to support up to two ITX motherboards. For maintenance and cooling, the RM-1U100DD is built with removable filters that is washable and protect from systems from dust & dirt. By including 4x front and 4x side 40mm ball bearing fans, cooling isn’t a problem especially for power users who incorporate high end hardware into this rackmount.