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Cooler Master HAF Stacker Review


HardwareCanuck Review Editor
Staff member
Feb 26, 2007
Cooler Master’s HAF Stacker series is one of the first unique case concepts we’ve come across in a long time. Sure there has been some great innovations in the past like the diminutive HAF XB and Enthoo’s awesome Primo which combined every highlight we could ever want in an enclosure. The Stacker on the other hand does things differently. Instead of using a one-size-fits-all solution, it allows you to customize your case with a modularized approach, adding or removing any elements or placing them in different configurations.

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The Stacker concept is quite simple: there are three basic cases which can all be combined together or used separately. The base element of the Stacker equation is the 935, a mid tower case (dubbed the 925) which comes with an add-on secondary enclosure that is completely optional during your build but we ultimately recommend using it since it adds space. Cooler Master dubs this the first “mod tower” and we have to agree.


This combination has the signature HAF industrialized looks, incorporates an awesome tinted side window and stacks via an innovative rail system alongside a few strategically-placed screws for security. There are also a number of rubberized grommets that facilitate cable pass-through between one module and another.

One of the major selling points of this system is the water cooling options it provides. Not only does the HAF 935’s upper module allow for the installation of a bevy of additional hard drives but you can also mount two (yes, TWO) radiators within it. This is all provided in order to augment the main chassis’ already-impressive cooling and storage options.

<iframe width="640" height="360" src="//www.youtube.com/embed/jLrHYYYECVk" frameborder="0" allowfullscreen></iframe>​

Along with the larger HAF 935, Cooler Master has also released two smaller “cases” that are also part of the Stacker system. These are dubbed the 915R and 915F and can be utilized with the 935 or on their own depending on how you want your system set up. They really take the whole modularized approach to the next level.


The 915R can actually be used as a stand-alone mini ITX chassis or, as with all the Stacker components, added to another module. In its stand-alone form it can effectively act as an enclosure for SFF systems while even retaining the ability to mount larger graphics cards.

When added to the 935, it can either become a hub for additional storage or continue with its original design intent and be used as a residence for a full secondary system. This actually keeps quite well with what many consumers want: a small SFF system for low power tasks and a fully-fledged system for gaming, photo editing and other tasks.

Cooler Master’s 915F on the other hand isn’t quite as capable as its 915R sibling, though it does incorporate all of the front panel connectors and power / reset switches we’ve come to associate with standard cases. However, due to its oddball placement of certain elements (namely the storage cages and power supply) the 915R is more capable for full SFF systems. However, that doesn’t mean it isn’t well designed since Cooler Master has incorporated several features to make its place in the Stacker lineup very well defined.

Both the 915R and 915F can be put together or added to the HAF 935 for a truly impressive system. How does it “stack” up? Check out our two-part video review above.