Now, CM Stacker 831, the newer and improved Stacker series not only is equipped with the highly praised features from its predecessor, but also incorporates the suppor t for the new Raptor X technology. In addition, enhanced airow design and extra suppor t for 230mm EPS powersupply make Stacker 831 a must-have every PC Enthusiasts want to lay their hands on. This ground-breaking chassis is designed with value-added functionality, unmatched upgradability, tool-free user friendliness, and the superior thermal management.