SGI's 3U high half-depth rackmount servers feature an impressive array of expansion slots with high capacity drives for bulk storage needs. The 3000 Series servers feature up to 12 drives per system for a practical density of 24 drives per 3U height when mounted back-to-back in our Rackable Series racks. Featuring high efficiency power supplies, memory and processors, these systems help reduce data center power and consumption and heat output.