The ATCS 840 from Cooler Master is part of the elite range of cabinets for really discerning folk. An all-aluminium design gives this huge cabinet a classy and corrosion-resistant look. Given its size and weight, it's not something you'd want to move often. The external ports neatly hide in a clickable flap on the top. lt's got a total of three giant 230-mm fans on top and front, and a standard 120-mm fan at the back. You can also place a fan at the bottom grille which is protected by a neat removable dust cover. Both side covers as well as the top are removable via hand-removable screws. But the covers don't slide back in a single stroke.

The two 230-mm fans on the top can be replaced by a radiator on top and there are openings for cooling pipes. A PSU can either be top, or bottom mounted. We liked the easily removable mechanisms for the hard disk and the optical drive, although the later did not fit in as securely. Another great thing about this cabinet is the removable motherboard tray that makes installation quite easy. The cutout on this tray allows easy installation of backplate coolers. The cabinet comes with an external GPU cooling chassis that we doubt will be a necessity for such a well-ventilated cabinet.