The new Cooler Master ATCS 840 is an all-aluminum full-tower case supporting two power supplies, coming with four fans (one 230-mm fan on the front panel, two 230-mm fans on the top and one 120-mm fan on the rear), removable motherboard tray, several other features we will talk about and a very conservative looks. Let's take an in-depth look on this latest release by Cooler Master.