The RMC8404-B is a 4U high rackmount computer supporting a standard ATX motherboard and AMD Ryzen processors. The rackmount system features 7 x PCIe expansion slots, 2 x 5.25" external drive bays, 2 x easy swap rear fans & front access dual USB ports, and a 16.1" depth rackmount chassis. The RMC8404-B is fully customizable and offers options including additional storage space, removable drive bay options, add-on cards, graphic cards, and Windows OS.