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Item#: N82E16811119290

Cooler Master HAF Stacker 935 - Full Mod-Tower Computer Case with Windowed Side Panel and Modular Dual - Compatible with bitcoin mining

  • Steel / Plastic
  • USB 3.0 x 2, USB x 2, Audio Front Ports
  • 3 + 1 (915R) External 5.25" Drive Bays
  • 9 (3 x modular cage) Internal 3.5" Drive Bays
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
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Cooler Master HAF 935 Stacker ATX Modular & Expandable Chassis

Introducing the HAF Stacker "Mod-tower" Case Series. The HAF Stacker Mod-tower is tuned to tackle the unique needs of enthusiast builders, hardcore gamers, and a wide spectrum of builders. Unique to the HAF Stacker 915F and 915R stacking system, massive home data storage, server, and farming become as easy as adding another unit on a whim. HAF Stacker Mod-towers open up a new world of possibilities. In HAF Stacker Mod-towers you can build whatever you can dream up. The only limitation is your imagination.



Will you fight to find cures for diseases, earn virtual currency, digitally connect your home, or host your growing business? The choice is yours.

Go ahead. Stack up. Stack On. A whole new computer ecosystem awaits you.


HAF Stacker supports the latest hardware including longer graphics cards, water cooling, multiple systems, and even multiple power supplies.

Build or stack to create a traditional ATX + mini-ITX system, NAS box, server, radiator box, or many other possibilities.

Future-proof your system with the modular I/O panel to keep up with the best technologies without replacing your case.

What's Included

HAF 935 (915R + Main Unit) Cases

User Manual

Accessory Box

HAF Series Comparison

Main Unit

HAF 915R Stacker






235 x 719 x 578mm / 9.25 x 28.3 x 22.75 inches

Expansion Slots

8 + 1


5.25" Bays (Optical Drives)



3.5" Bays (Hard Drives)



2.5" Bays (Hard Drives or SSDs)

6 + 1 M/B Tray


5.25" Bays (Optical Drives)



Side Panel Window



PSU Mounting Location



Maximum Fans Supported

5 x 140mm, 11 x 120mm, 1 x 92mm


All-In-One (AIO) / DIY Watercooling Radiator Support
*May vary based on configuration and accessories.

120mm, 140mm, 2 x 240mm

120mm, 140mm, 2 x 240mm,
2 x 280mm, 2 x 360mm

Motherboard Support



Maximum Graphics Card Length

354mm / 13.93 inches

360mm / 14.17 inches

Learn more about the Cooler Master HAF-935-KWN1


HAF Stacker 935 Window


Case Material
Steel / Plastic
With Power Supply
Power Supply Mounted
Motherboard Compatibility
EATX, ATX, microATX, Mini-ITX (915R)
With Side Panel Window


External 5.25" Drive Bays
3 + 1 (915R)
Internal 3.5" Drive Bays
9 (3 x modular cage)
Expansion Slots
8 + 1 and 2 (915R)

Front Ports

Front Ports
USB 3.0 x 2, USB x 2, Audio

Cooling System

140mm Fans

Physical Spec

235 x 719 x 578 mm / 9.25 x 28.8 x 22.75 inch
15.6 kg / 34.5 lbs


SSD Bays: 9 (converted), 1 (MB tray) + 3 (915R)

Materials: Bezel: Mesh/Polymer; Case body: Steel SGCC-t0.7

Cooling Support (varies by stacking setup):
Top: 120mm x 2 Front: 120mm x 2 / 92mm x 1 (included)
Rear: 140mm (included) / 120mm x 1
Side: 120mm x 6, 140mm x 4 (915R)
Radiators: 360mm x 2 / 280mm x 2 (Side) 140mm / 120mm x 1 (Rear)

Maximum Compatibility:
VGA card length: 354mm / 13.9 inch, 360mm / 14.17 inch
CPU cooler height: 180mm / 7 inch, 80mm / 3.15 inch

World's first "mod-tower" with stacking functionality for limitless utility

Stack extra 915F or 915R for dual/triple system or additional water cooling and storage

Dust filtered intakes and sliding filter frames

Intuitive design for flexible and easy installations

Greater storage expandability with transferrable drive cages between chassis

Full window version (tinted)

Modular I/O functionality for future-proof connectivity

Multiple removable dust filters (top, front, bottom, side panel) for improved system maintenance.

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the Cooler Master HAF-935-KWN1

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  • gerald c.
  • 3/31/2014 10:11:15 PM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

2 out of 5 eggsGood Tower

Pros: Looks like it has a ton of possibilities for configuring, just plan on doing it all custom.

Cons: -Did not come with front fan.
-***Could not fit a 1200watt power supply.*** (there is -a bump that blocks the bottom power supply mounting)
-Cannot put an fans/cooler on the side pane.
-Placing watercooled cpu cooler requires alot of modification to the unit and cooler and or case.
-Go with the 935 unless you plan on customizing/cutting/do it youself cooling/mount a big power supply anywheres but the bottom.
-Definatly not a purpose built case has maybe too many options built in that an simple one is not possible

Other Thoughts: Bought this with intentionns of having two PC's in one. Opened the box and started fitting parts and peices and was about to take out the drill and cutting wheel just to fit my power supply (1200w). Then started to test fit my cpu cooler (radiator 2 fans) when i noticed that it would not be able to fit the top seciton unless i routed it to the add on where i planned on putting the mini motherboard and needed longer hoses and more customization. Looked online and found the 935 will fit my needs better. Might find a use for this case sometime down the road. there are some creative builds online but all custom, not what im looking to do just yet.

0 out of 4 people found this review helpful. Did you? Yes No

  • Daniel A.
  • 3/24/2014 10:06:16 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggsGreat Case with plenty of expandability

Pros: This thing is huge. I don't think its physically possible to run out of room in this case. plenty of drive storage, great cable management, and the ability to house two (or even three) systems. right now I have the 915R on the bottom housing my HDDs and DVD drive. very sturdily built, too. the tinted acrylic panel is a nice addition, if a bit of a fingerprint magnet. watercooling potential is huge.

Cons: a few nitpicks. the standoffs were a bit stubborn to get into place, and the included Phillips head adapter is completely useless (maybe I just got a junk one). a few of the drive bay caddys had the screws that hold the hard drives in place pop out, so they could be designed a bit better. also, USB3 to USB2 adapters really should be standard on cases with USB 3 ports. also, this thing is a behemoth, in case I didn't get that through. its about 3 feet tall. also, the 915R is useless on its own because it doesn't come with any power buttons or ports, making the mini-ITX mounts next to useless.

Other Thoughts: If you plan on using this as a multiple system build, get the HAF Stacker 915F along with it. it's a bit better designed for Mini-ITX systems. for any other use, this is a great case.

Did you find this review helpful? Yes No

  • Marcia N.
  • 3/21/2014 3:54:06 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsAwesome

Pros: I have built/ repaired plenty of systems; One of the biggest issues i have always ran into was ROOM! Don't have that problem. Another issue i have always ran into was AIR Flow! Oh man, on man. You want to talk about air flow. Originally i wanted to use a liquid cooling system, however, due to the fan placements this tower is two of the best i have ever ordered/ used.
Intel Core i7-4770K Haswell 3.5GHz
EVGA 100-FS-C901-KR 92mm Sleeve mITX ACX CPU Cooler, Direct Touch 4 Heat Pipe
ASUS GTX660 Video Card
G.SKILL Ripjaws Series 8GB (2 x 4GB)
Rosewill LIGHTNING-1300 1300W
Blu-ray drive

I have yet to see the systems heat to bad, don't have a problem removing components and/or replacing them. Except for the heat sink!not much room after you put the ram and video card in. However, it has plenty of room for upgrades!

Still plan on getting liquid cooling and pushing its ability to the max. Prefect for the price! Can't go wrong!

Cons: a bit bulky, top fans don't have much room to pull air through the top mini-atx tower, however still pushes air like a beast! Wires, Wires, Wires, WIRES!!! lol. Donno if thats really a con though. Not a tower con at least! lol

Other Thoughts: Honestly, Its a Perfect Tower! Plus you can Expand the tower as you deem fit to add additional power, space, practically another computer if ever needed!
Wish i could upload a video and show you. kinda don't want to move the tower since i got it all together! I Would most differently suggest to invest in LED lighting for this bad baby!

Did you find this review helpful? Yes No

  • John M.
  • 2/28/2014 12:46:29 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsBeastly Case

Pros: The tower and stacker 915R section are absolutely awesome! Quite a solid build with plenty of room to play around in. I have my setup with the 915R mounted on the bottom (housing my power supply, hard drives, and DVD drive) and the tower on top (housing my motherboard, cpu+cpu cooler, RAM, and video card).

Cons: If you decide to mount two 120mm fans in the front of the case, make sure you are NOT using Cooler Master's Sickleflow fans or Corsair Air Series fans. The screws will be too big for the case holes to mounts the fans onto. Also, if you decide to mount your hard drives in the 915R, you will be unable to use a 120mm fan directly in front of the hard drives (at least, this seems to be the issue for me). Neither of these however deserve to have an egg removed!

Other Thoughts: I am very pleased with this case, and would definitely recommend it to anyone wanting a truly awesome gaming computer!

1 out of 1 people found this review helpful. Did you? Yes No

  • MARK D.
  • 2/24/2014 2:28:38 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsGood Case

Pros: Case is great for lots of different types of builds. I built mine for a Huge media and data server.

Love being able to swap cases for different types of builds
No other case is able to put more parts in one build at this price range.

Cons: If you put 3 HDD cages in the smaller case you cant install the 120mm fans on the sides without hitting the tabs on the HDD sleds and its REALLY TIGHT with the cable on the other side. I was able to put all 6 fans on the sides after modding a few things(cut the tabs off the sleds and ordered special cable adapter). Dose not come with a 3.5 cover for the 5.25 bays. I would love to be able to install a card reader or a small fan controller.

Other Thoughts: Other than the cons I listed, The case is very well made. VERY STRONG CASE!!!

In the case I have:
8Gs 1600 DDR3
Asrock Z87 Extreme11/ac
Nvidia 9800GT-Nothing special
24 Total HDD-WD Blacks and Reds
240G Intel 335 Series SSD-OS
20 120mm fans Cougar CF-V12HB
2 Zalman MFC1 Fan controller

1 out of 1 people found this review helpful. Did you? Yes No

  • Robert K.
  • 2/10/2014 4:32:45 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsBest Sub $200 tower

Pros: - Large, and modular
- Expand-ability
- Multiple configurations
- Well made and great customer service from Cooler Master

Cons: - There are only two fans supplied, but it is advertised this way to no egg reduction. You will get a 140 mm rear, and a 94 mm in the 915. be prepared to spend some cash on fans.

Other Thoughts: Once the lower HDD strays are removed there is a large gap that would have been nice to have a removable piece in there to mount a reservoir, easy to manufacture, but just a thought.

1 out of 1 people found this review helpful. Did you? Yes No

  • Aaron P.
  • 2/3/2014 5:43:39 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsAll Around Good Case

Pros: This case has a lot going for it. Its massive, supports a broad range of cooling solutions, and is generally well built. I used it for a new water cooled gaming computer.

-The extra module provides plenty of space for bulky water cooling components. You can fit two 360mm radiators in the extra case along with a single 140mm in the back of the main module.
-The main unit's side panels are very sturdy. I accidentally sat on the window and it came out of the experience completely unscathed.
- The included tool-less drive trays are very tough and simple to use. Making drive installation very easy.

Considering how cheap it is (compared to some other water cooling cases), this is an excellent product that I highly recommend.

Cons: Any potential buyers should be aware of the few caveats this thing has.

-Some of the removable components, such as the front panel and the top cover, are made of extremely flimsy plastic. Go in too hard on a screw and you will break it. (I know this from experience...)
-The dust filters on the second module are attached with screws, making them difficult to remove for cleaning.
-There's not much room in the back for routing cables, about a quarter inch, so your cable management will have to be pretty tight.
-There is no reset button on the front panel
-I had a stuck screw in mine when it came. It took about two hours to remove. Once it was out, I was able to re-thread the hole with a power drill and it worked fine after that. Don't let that scare you, it's just a manufacturer's fluke.

Other Thoughts: All-in-all, this is a very quality, and economical case. There are better cases out there for water cooling. (The 900D, for example) But if you want to save a couple hundred dollars and still have an excellent product, this is the case for you.

4 out of 4 people found this review helpful. Did you? Yes No

  • albert w.
  • 1/28/2014 8:51:41 PM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsgood case

Pros: if you want a case where all you see is your hardware this is it no matter where the wire is there will be a hole for it and plenty of room to get to point a to b

Cons: doors are kinda flimsy as in very large and takes two hands to seat all pins evenly

Other Thoughts: buy it if you like building and playing with your pc as much as actually playing it this is the one

2 out of 2 people found this review helpful. Did you? Yes No

  • Daniel S.
  • 1/27/2014 6:14:53 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week

5 out of 5 eggsWoW

Pros: Amazing build quality.
Amazing cable management options.
Huge...which make any upgrades/mods easier.
Looks pretty epic.

Cons: Nothing.

Other Thoughts: 15 years building PC's and this case has changed my life. Went from a Gen1 Antec 1200(which I thought was pretty nice) to this and WOOOOW. The quality is amazing and i used the top micro-ATX case to mount my new Corsair H-100i so it is completely separate from my build and went with every 120/140mm slot filled with Scythe Gentle Typhoon AP-15. The airflow is amazing and given the amount of fans it is a dull hum with no headphones on and with headphones I can't even tell its on. Single Best upgrade I have ever done to make my life easier and improve my airflow ever.

Did you find this review helpful? Yes No

  • Brahim B.
  • 1/15/2014 8:53:37 PM
  • Tech Level: High
  • Ownership: less than 1 day

3 out of 5 eggsOkay overall with one major flaw

Pros: - Modular
- Light but sturdy

Cons: - The 3x 5.25" bays in the tower cannot be removed, which is terrible for a modular system (biggest flaw). This restricts those of us with large motherboards and CPUs mounted on the upper right.
You can tell they made a compromise as the 5.25" bay in the 915R is removable. In the tower, the bays are structural and the case would fall apart without them.

- The 915R bundled is unusable on its own as it lacks a power switch unlike the retail 915R, which makes mounting a second mini-itx system there pointless. How would you power it?

- Lack of wide foot pegs for better stability especially if you intend to go all the way to 945 stack.

Other Thoughts: Poor usage of the space for HDDs and SSDs.
If you choose to mount all your storage in the 915R, you will find that the racks leave plenty of space that could have been used for more disks.
It would have been super easy to build an SSD rack that holds 10 of them easy or at least 6 in lieu of one of the 3x HDD racks.

0 out of 4 people found this review helpful. Did you? Yes No

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Item#: N82E16811119290
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