Abstract: A computer chassis is provided having a front section, a rear section having a port positioned to align with a port in an auxiliary chassis, and mounting portions configured to interface with opposable portions across a rack.

Abstract: This involves the efficient placement of multiple computers within a given site. The available density of computer systems that may be provided at a location is advantageously increased through various features. By placement of access space to all elements which require periodic attention at the front of each computer, the need for significant space at the rear of a computer is eliminated. Such a computer hardware configuration facilitates back-to-back placement of computers in a rack. Racks filled in this manner may be arranged in rows or otherwise. The back-to-back computers in a rack define an air/gas column that may be air conditioned. By drawing air from this column (or forcing it) through a computer from its back/sides to its front/sides across heat-generating components, highly-effective cooling with certain advantages is achieved.

Abstract: This invention involves the efficient placement of a pair of main boards within a given computer chassis. The available density of CPUs and main boards that may be provided for a given chassis height is advantageously increased through the use of a dual opposing main board configuration. With this configuration, two main boards are mounted opposing each other within a chassis. They are placed such that their I/O connectors are on the same side of the main board to improve usability. They are also mounted within the chassis so the components on the main boards (such as the cards, CPU fans, CPU heat sinks, etc.) do not physically interfere with each other. This configuration improves CPU density and cooling, especially when stacked with like chassis.