The right choice when compromise is not an option the ibm system x3550 m4 blends outstanding uptime performance and io flexibility for cost efficiency and rock solid reliability this compact rack server offers an energy smart affordable and easy to use solution with a pay as you grow design to help lower costs and manage risks with more computing power per watt and advanced memory support the x3550 m4 offers balanced performance and density with redundant and hot swap fans disks and power s