So, why would you want to stack cases? In my particular situation, I have a mini-ITX Hackintosh I use day to day, and a larger PC system for gaming. What with various review and other systems, my desk space is at a premium, so being able to combine the two systems into one would be a big win for me.
However, that’s just the obvious use. Perhaps a look at some other features of the cases will give some hints to what else you can do.
Here are the accessories delivered with the 935. There are blocking plates for the power supply and I/O panel openings in the rear of the 915R, a SATA power extension cable, and the usual bag of screws and zip ties. The idea here is that you’d use the 915R not for a mini-ITX system, but to hold additional components for your main system…components like water cooling equipment or extra drives.
Here’s the bottom of the 915F (the 915R is similar), with the rear of the case to the left. The large rubber grommeted hole under the motherboard area is large enough to pass the pump of an all-in-one water cooling system, so you could mount the radiator and fans outside the tower component of the system. The four larger holes in the middle will fit 1″ diameter water hoses, or just SATA power and data cables.
The bottom of the tower component of the 935 has a pull-out filter for the power supply intake, as well as two of the large grommeted holes.
The side panels of each 915 are identical (really identical– there’s no “left panel” and “right panel”), and provide mounting points for up to a 3x120mm radiator. You can also mount a 3x120mm radiator in the top of the tower component.
Each member of the Cooler Master HAF Stacker modular case system uses the same removable feet and top panel. You remove the feet to stack the case on top of another, and you remove the top panel to stack another case on top.
The bottom and top rails of each case have these protruding ledges, which secure the case components when interlocked with the ledges on another case, the feet, or the mesh case top.
To attach the cases, remove the feet from the case that will be on top and the top from the case that will be on the bottom. Line up the first vertical ridge on the top case to the slot behind the arrows in the bottom case. Set the top case down and slide it forwards until it stops. At this point the screw holes– boxed in red in the image above– will line up and you can secure the cases with two screws on each side. The screws thread into metal taps for durability.
The bottom of each case component has a hinged flap that will block air flow between the components.