The most popular computer case designs get licensed out to other manufacturers all the time, so it's not surprising that Cooler Master has re-launched the ATCS 840 after their own previously modeled design. The full-tower RC-840 chassis is built on the principal of cooling performance, which is where it receives its name. ATCS stands for Advanced Thermal Cooling Solution, and the RC-840 has more than enough room inside to accomplish this task in short order. In this articles, Benchmark Reviews tests the black aluminum-alloy RC-840-KKN1-GP model and explores the various configurations gamers and enthusiasts can expect from this enclosure.