Cooler Master started out with offering computer cases a few years back. The ATC series was a huge success and the cases were incredibly well made. The ATC-201 aluminum case was part of the Maximum PC "Dream Machine 2001". In 2009, Cooler Master has released the ATCS 840, which is defined by the same high quality aluminum construction we have seen in the ATC line, along with a new look and all the modern features we would want in a chassis like this.