1U rackmount computers 1U rackmount computers have a depth of 21 to 24 inches. They have full-length PCI slots, dedicated power supplies, and limited drive bays. 2U rackmount computers 2U rackmount computers have dedicated power supplies, slots for butterfly backplanes, and cooling fans. Some models have removable hard drives. 3U rackmount computers 3U rackmount computers have several external drive and hard drive bays. They have two cooling fans and optional sliding rails. 4U rackmount computers 4U rackmount computers have up to 14 full-length slots and several external and removable bays. Some models are capable of fitting in ATX motherboards. 6U/7U rackmount computers 6U/7U rackmount computers are almost 20 inches deep. They have up to 20 backplane slots, three cooling fans, and built-in power supplies. They also have large internal and external bays. |