Cooler Master HAF Stacker System Review
Introduction
The HAF Stacker from Cooler Master is a modular system made up from three components each of which can be brought together in varying combinations depending on the breadth of your needs and the depth of your pockets. In simple terms what we have is the Stacker 935 which is a standard tower chassis combined and sold with a smaller modular ITX chassis in the form of the 915R. Should you so desire to place a truly megalithic slab of summit seeking prolific PC on your desk you can go the full trotter and create your very own Stacker 945 which if you haven’t guessed is the 935 described above combined with a further ITX module in the shape of either the 915R or the 915F. As you might imagine, the more you add the taller your PC becomes and the higher the price climbs. The price at the top of the page reflects that of the extended system, however the base 935 which includes a slightly modified 915R can be bought for £152.99, should you wish to add a 915F then you’ll have to part with another £56.50, or £66.38 for the 915R model as a standalone unit. Being a modular system it of course entirely possible to pair up two or even 3 of the 915 modules to create a smaller system that best suits your needs
In bringing this review together we will show you the merits of each of the individual modules in their own right and then look at the system as a whole at the end. If you’re the sort who tends to skip forward then you’re going to miss an awful lot of detail in doing so, so it’s worth making your way methodically through this review.
Before we move on to the technical Specification section we do need to get something off our chests. Cooler Master have claimed to have come up with the idea of a Stacker system when one of their number hit on the concept in a break between brain storming sessions. This may well be true, and we would never begin to doubt his artistic integrity of said individual, that said, the HAF Stacker does bear more than a passing resemblance both in form and function to a certain SR-2 Stacker build by Coolmiester, AKA Paul who also happens to be a good friend of ours here at OC3D. Just saying, thatâs all.
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Technical Specification
As there’s more than one module here we’re going to cover all three technical specifications.
935 (which includes the 915R)
 Model Number |  HAF-935-KWN1 |
 Colour |  Midnight Black |
 Material |  Bezel: Mesh Polymer, Case body SGCC 0.7T Steel |
 Dimensions |  235x719x578mm (WxHxD) |
 Net Weight |  15.6kg |
 Motherboard |  EATX, ATX, Micro ATX (915R, Mini-ITX) |
 5.25″ |  3+1 (915R) |
 3.5″ |  6+3 (915R), 3x modular drive bays |
 2.5″ |  9+1 behind Motherboard tray |
 I/O Panel |  2xUSB3.0, 2xUSB2.0, Audio IN/OUT |
 Expansion Slots      |  8+1 (+2 with 915R) |
 Air Cooling | Â
Top: 120mm fan x 2 (optional) |
 Water Cooling | Â
Front: 240mm x 1 (requires an optional adapter, with the HDD cage removed) |
 PSU type |  Standard ATX |
 Compatibility | Â
VGA card length: 354mm / 13.9 inch |
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915R
 Model Number |  HAF-915R-KKN1 |
 Colour |  Midnight Black |
 Material |  Bezel: Mesh Polymer, Case body SGCC 0.7T Steel |
 Dimensions |  228x248x578mm (WxHxD) |
 Net Weight |  5.7kg |
 Motherboard |  Mini-ITX |
 5.25″ |  1 |
 3.5″ |  3 |
 2.5″ |  3 |
 I/O Panel |  2xUSB3.0, 2xUSB2.0, Audio IN/OUT |
 Expansion Slots |  2 |
 Air Cooling | Â
Front 92mm fan x1 installed Side 6x120mm or 4x140mm |
 Water Cooling |  Side: 120,140,240,280,360 x 2 (optional) |
 PSU type |  Standard ATX |
 Compatibility | Â
VGA card length:Â 360mm, 14.2″ |
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915F
 Model Number |  HAF-915F-KKN1 |
 Colour |  Midnight Black |
 Material |  Bezel: Mesh Polymer, Case body SGCC 0.7T Steel |
 Dimensions |  228x248x578mm (WxHxD) |
 Net Weight |  5.2kg |
 Motherboard |  Mini-ITX |
 5.25″ |  1 |
 3.5″ |  3 (1 from ODD bay) |
 2.5″ |  3 (1 from ODD bay |
 I/O Panel |  2xUSB3.0, 2xUSB2.0, Audio IN/OUT |
 Expansion Slots      |  2 |
 Air Cooling | Â
 Rear: 120mm fan x 1 (installed) |
 Water Cooling |  Individual mode: 120mm x 1 (optional) – rear  Stacking mode: 120/140/240/280/360mm x 2 (optional) side panel |
 PSU type |  Standard ATX |
 Compatibility | Â
 VGA card length: 360mm, 14.2″ |