US Patent 8659895 Air-cooled data center rows

A computer data center system includes stacks of computers, each of the stacks computer motherboard assemblies arranged vertically with respect to one another, a first row of stacks, the row defined by stacks arranged adjacent to each other in a horizontal line of stacks, and a cool air supply plenum adjacent to the first row of stacks. The cool air supply plenum supplies cool air to a first side of the first row of stacks for cooling computers placed in the stacks, and has a longitudinal axis substantially parallel with an average air flow of cooling air in the plenum. Computer assemblies in the first row of stacks include portions that are closer to the longitudinal axis of the cool air supply plenum than other portions of the same assemblies, or portions of adjacent computer assemblies that are closest to the longitudinal axis for the adjacent assemblies.