Blade servers are an evolutionary step in the design of commodity servers for the data center. The tower server of the 80’s and 90’s became the rack-mount server of today. The rack-mount server is evolving into the blade server. With each change there has been increased computing power in smaller physical structures and, while more efficient, an increase in power and heat density. Rack-mount servers were more densely packed than tower servers and blade servers are more densely packed then rack-mount servers; an evolution, not a revolution.