A cooling system for a multi processor system mounted in a rack that has a top, a bottom, sides and a plurality of card cages. Each of the card cages has card guides for receiving mother boards such that the mother boards are positioned vertically within the rack. A CPU is mounted on a mother board and...http://www.google.se/patents/US6108204?utm_source=gb-gplus-sharePatent US6108204 - CPU heat sink
