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Item#: N82E16811119290

Cooler Master HAF Stacker 935 Two-Piece Mod-Tower Computer Case with Top Compartment for Extra Storage Space, Water Cooling Support, or Mini-ITX System

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  • 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

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

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.

Stack Up. Stack On.

Patent-Pending Modular Rail System

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.

Endless Possibilities

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






9.25 x 28.3 x 22.75 inches (235 x 719 x 578mm)

Expansion Slots

8 + 1


5.25" Bays (Optical Drives)



3.5" Bays (Hard Drives)



2.5" Bays (Hard Drives or SSDs)

6 + 1 MB 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 very based on configuration and accessories.

120mm, 140mm

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

Motherboard Support



Maximum Graphics Card Length

13.93 inches (354mm)

14.17 inches (360mm)

Learn more about the Cooler Master HAF-935-KWN1

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details

Customer Reviews of the Cooler Master HAF-935-KWN1

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  • David K.
  • 3/5/2015 8:50:12 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsBig, Bad, Black!

Pros: "I am William Wallace!" ...I know, he builds 3 foot tall computers and maxes them out!!!

I own a 945 HAF Stacker and you don't! 'nuff said!

...if you don't understand, check out the pictures!

Cons: hmm, I'll say it again: it's a 945 HAF Stacker! (I added the 915R)

Other Thoughts: means you never have to say you're sorry!

2 out of 6 people found this review helpful. Did you? Yes No

  • Caio M.
  • 2/20/2015 2:33:13 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsAwesome Flexibility

Pros: -Awesome Flexibility for water cooling
-Very easy to remove bays
-Sturdy construction
-Room for any video card config ( 3 way 290x water cooled in my case)
-Much better than my FT02 in terms of air flow despite the FT02 90 degree design

Cons: -Massive. My system is an HAF 935 and a 915R making it very high but it has one 3x120 radiator push-pull and one 2x120 push.

Did you find this review helpful? Yes No

  • Jason G.
  • 1/28/2015 10:47:16 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsGreat idea but needs improvement

Pros: 1) The case is large and there is a lot of space to work inside. I had no problem putting my system together.

2) The cable management is very good and seems very well thought out, aside from the very tight space in the area where the cables hide on the right side of the case behind the side panel.

3) Drive mounting is excellent. There is a latch on each side of the mount, so there is no cramming the drive into the mount. Just undo the latch on either side, slide the drive in, and close the latches. Done. Also, no adapters are needed for 2.5 inch drives.

4) The mini module is incredibly useful for water cooling and/or additional drive storage. I'm not currently using it, but it allows me expansion room for the future.

5) The design isn't gaudy, and the side panel window looks great being that it sticks out a little and is tinted. It gives the interior a sort of a stealth look while still being able to see inside.

6) When I received the case initially I looked it over and didn't notice anything wrong with it, so I cut the UPC off the box and sent in the rebate. A few weeks later when I went to build my system I realized the front panel on the main case was cracked and one of the panel mounts was broken, and the damage was not caused in shipping because there was no damage to the shipping box. Because the UPC was gone Newegg couldn't help me, so I called up Cooler Master and explained my situation and was directed to the website where I submitted an RMA request and was sent a brand new front panel (for both the main and mini cases) free of charge. Impressive customer service!

Cons: 1) First and foremost, the power button is the worst I've ever seen on any case. It is not recessed at all and is incredibly sensitive, so if you happen to bump it just slightly with your knee or whatever else the system shuts down. I've done this 5 or 6 times already and it's infuriating every single time because it's far too easy to do and could have very easily been avoided. Whoever designed the power button needs to be fired.

2) For a "High Air Flow" (HAF) case, the airflow in this thing really isn't all that great and the fan options are limited. The front panel can take two 120mm fans or one 140mm, but all airflow is blocked by the drive bays. I have one drive bay removed so at least one of the fans brings in air, but the other bay is still in place for now and blocking airflow from the other fan. I'm not currently using the mini case in addition to the main case so if I want to move the drive bays I need to buy a 5.25 inch bay adapter to hold my HDD and SSD.

3) As stated above, the fan options are limited, especially considering the size of the case. The front panel can take two 120mm fans or one 140mm, the rear panel can take one 140mm (included), and the top panel can take three 120mm fans or two 140mm fans. For such a large case there are no mounting options anywhere for a 200mm fan, which I find odd. You can buy a different side panel from Cooler Master that includes a 200mm fan for around $35 shipped, but that is the only 200mm option. The top fans are also a very tight squeeze on the ends.

4) The dust filters seem to work well, but they are part of the panels and not easily accessible. In order to remove the front panel, you must first unscrew and remove both side panels, then you can pop off the front panel and clean the filter.

5) The motherboard, rear fan, and 5.25 drive bay are too close to the top of the case to allow room to mount a radiator on the top panel of the main case. I don't quite understand why they would design the case this way.

6) While cable management is very good, the space to hide cables on the right side of the case is VERY tight, making it difficult to pack in all your cables and reinstall the side panel.

7) Some of the plastic parts, particularly the front panel, seems a bit cheap and flimsy, which is probably part of the reason it arrived broken. There was also another broke plastic piece floating around inside the case and I have yet to figure out where it came from (it doesn't look to be from anywhere on the front panel).

Other Thoughts: This is the first system I've built in about 10-12 years, so this case is obviously leaps and bounds better than the huge Chieftec I built in the early 2000's.

The case is large, about 28 inches tall with the mini modular case and about 40 lbs when in the shipping box. It's not easy to move, so I wouldn't recommend it if you need to move it around a lot.

While I do like the case and I'm not necessarily disappointed, the cons are a bit nagging, especially the power button. In fact, if I had to do it over, I would buy a different case, most likely an NZXT Phantom, which was in the final running with this one when I made my choice.

0 out of 3 people found this review helpful. Did you? Yes No

  • Keven H.
  • 12/30/2014 12:04:23 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsSpace for Nepton 140XL Water Cooling

Pros: This case is much taller than any I've owned before. With the smaller piece on top the case stands about 28 inches tall.

There is a lot of room for drives. Given I put the radiator in the top piece the main case if fairly open and should have good airflow.

Cons: The top stacked piece slides on. I have not found any way to lock it in place. (I may have overlooked something?) So if I bump the top part it causes it to slide backwards. Since my radiator is in this part of the case that concerns me.

I'll eventually move the case to a corner of my office and this shouldn't be a problem for me. But beware.

Other Thoughts: I recently purchased a Nepton 140XL. My first foray into water cooling and overclocking.

Unfortunately I didn't realize how much of a problem the 140 mm fan was going to be. None of my existing cases would accommodate the size of the fans and radiator. Some had room on the top of the case, but due to the uneven design of the ventilation that prevented me from mounting the Nepton 140XL.

I didn't initially plan on buying a new case, but wanted to keep the water cooling and felt that since Cooler Master made both the water cooling and case these should work well together.

Other than the fact the top piece can slide around (noted in "Cons") I'm happy with this case.

Did you find this review helpful? Yes No

  • Cody E.
  • 12/14/2014 6:43:11 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsI love this case

Pros: This case has so much room.

Cons: I wish there were mounting points for a top mounted Radiator with out using a 915 for a rad box.

Did you find this review helpful? Yes No

  • Iosif M.
  • 9/27/2014 3:12:32 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsThis is the future!!!

Pros: HUGE completely modular and every piece is available on Coolermaster's website for individual order. water-cooling in this case is amazing. and managing heat is even easier. just throw all hot components on top and only have the psu motherboard and gpu on the bottom. it is way too easy!!!

Cons: very large, but that is kinda what this case is for, it does not fit under a standard sized desk, it is about 2 inches too high. so if your computer needs to fit under the desk this is not for you.

Other Thoughts: I love it and I plan to add more to it. cooler master says that this case is not intended to stack more than 3 sections to one another but I think based on where you put the heavy components it can easily do more, it is very well built and I can sit on it (I don't recommend it) as a stress test. I will probably never buy a case ever again, this is truly a future-proof case

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

  • Benjamin J.
  • 9/22/2014 10:04:41 PM
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggspretty much a beast

Pros: pretty big for being a modular tower, and may be intimidating to most. Very customizable, and cannot wait for my water cooling system to be set up, with new mobo and cpu.

Cons: only con i have, is there is only 1 140mm fan in the back. this really is not a huge problem, i can always throw some after market fans in the front as well

Other Thoughts: the tower itself came in a large box with very durable packing foam. came with its own assortment of screws, mounting brackets, zip ties, sata power cable, and large 140mm fan in the back. the tower itself is heavy (40 pounds) and the tinted glass is amazing. if you plan to throw water cooling in it, this tower will deliverer and much more. the shipping was fast for saver also.

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

  • Eric P.
  • 8/3/2014 2:51:54 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsLove At First Sight!

Pros: It's not just functional its a work of art...

It's Massive...
It's Modular... allowing you to make it more massive.

Cons: It Doesn't Allow You To Travel Through Time & or Space!

Other Thoughts: I'm using this as a File Server/Downloader.

I currently have 12 HDDs installed.
10 are used in a Flex Raid, 8 DRU 2 PPU.
9 are in the small modular bay.

The 2 drive trays in the lower section are empty the remaining 3 drives are in a drive cage above those so I still have room for 6 more drives.

The 10 Raid Drives are all 3TB.

I'm considering buying another for a water cooled gaming system.

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

  • Cody F.
  • 7/20/2014 6:56:41 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsVery big, very nice case

Pros: - The case is very big with many cable routing possibilities (and many CM - that is, cable management.. just occurred to me that we're talking CM which is also Cooler Master - holes).
- As suggested, and as can be seen with pictures, it is very modular.
- For someone like me who is generally:
a) too lazy to improve ability of cable management (I don't have too many components and I don't need multiple video cards or even one large video card).
b) horrible at the cable management (see a).
I can still have the cables in a much nicer arrangement than other cases.
- It is sturdy, well built (inside and out with one minor thing, see cons) and it is hard to move itself (which of course makes it harder to knock over although in Southern California I know very well an earthquake could do that but it could also do that with the rest of the house... and the computers would be the least of my worries). The hard to move can be a problem in some ways (obviously it is only a problem in the rare times I need to move it) but overall I prefer it the way it is.
- The thumb screws that secure the sides of the case, can stay in the holes (of the sides themselves) while you have it left aside (...) while installing cards, moving cables, ...).

Cons: Most of these are minor I admit and I certainly would buy this case again (whether I might try another case or not - absolutely - but I like this case and this is the first case I can truthfully state that... and I've had a lot of cases over the years):
- The thumb screws for the case sides can be stubborn. Specifically, I have (more often than not) have tightened one (or all) and for each one I have to loosen it, straighten it and then tighten it again. This is more than I remember with other cases (even those with thumb screws).
- The sides can appear to be bent and/or seem to not properly close the case (this could partly be one of the personal preferences I refer to in other thoughts: how the side window protrudes out a bit and is not just a flat side... I actually like the look but it at least has thrown me off (but so has the other side)). This could possibly seem more so when you consider the first con (the appearance as well as the fact the thumb screws are not going in straight, can throw you off if you aren't aware or you're like me and doing this stuff at 3am or thereabouts).
- As at least one other person noted: the standoffs are very stubborn. I actually thought I had them in the case properly tightened and had to at some point (because they weren't tightened after all) unscrew the motherboard (only to find out they weren't tightened when the screw stayed attached to the standoff but the standoff actually came out of the case (so I had someone carefully balance the motherboard so that I could unscrew the screw from the standoff)). Then I did exactly as one of the other reviewers suggested (actually I had done this with some of them already but this one seemed to be OK hence not using it with this one): use plyers (British spelling: I mean pliers).
- It is very big. Yes this is a pro and a con. It takes a lot of space. But it offers great expandability so that is also good.
- The side (with the window) doesn't come with a fan. However, at CM's website you can buy this and it is fairly cheap ($20 or thereabouts). Comes with the fan unlike one of the reviewers suggest (at the CM website I mean). Or that's what I was told by a CM staff member who checked.
- The only flaw (or, if you're into computer security and also like puns, which very much fits me: hole) that bothers me - and not terribly so but enough to point out - is that they have no covers for the cable routing holes at the bottom (this is not a problem for the top of the cases because they supply a cover for the top; I've not looked into the possibility that that same cover could maybe - again, pardon the pun, close this hole). And at some point you will stop stacking and there you have the holes so you have potential for more dust to enter. Probably not a huge issue in that it is not simply a hole but rather a hole with rubber grommets.... but it is still something that might want to be considered (and I raised the issue with them, for what it is worth

Other Thoughts: There is a review here that suggests that the Sickleflow fans will not work for hard drives. I noticed this but I decided to take up the issue with CM and here is what they told me as a general rule (and so indeed it worked):
When you buy a case the manufacturer (including but not limited to CM) expects that you have different uses and so they supply the screws that fit the holes for the case in question. This means that you should use the proper screws (which are conveniently not marked...) - which is to say, case supplied screws - for the case including (in the example) the Sickleflow fans. So yes they do work (as a related point: the screws will work at the top of the case where the fan slots are available... although they are a bit tight). I also wrote about (on review of that fan) how you need to thread the holes on that fan first and that would help here too.

Another general rule: if you have kittens like I do, and in particular, a kitten that loves to steal things from you, be certain to either keep the room closed (with the kittens OUT of the room!) or to keep track of the items that come with the case (and everything else in your build or realistically everything in general!). Yes, I failed here and while I caught some of it I'm uncertain if I caught all of it (the accessories of the case and the motherboard - ASUS sabertooth z97mark 1 has many, many accessories... well, I don't know what I should or should not have).

There is one thing that also is lacking on this case that occurred to me now: lack of a manual of any kind. There is a sheet of paper showing how you can stack the modules together but that was about it.

Aside those: I really like the tinted window. I also like how it somewhat protrudes out rather than being flat (as I noted, however, this can give the look and feel that the case sides are not properly placed. However, I have had this same problem on the other side of the case so it probably is less the protruding window and more perception - or lack thereof - on my part.. but it does seem that the sides - or the case in general - has some stubborn properties). I don't consider these pros or cons (you either like the tinted window and how it protrudes out/is not flat, or you don't. That's a look and if you don't like the look of a case and it matters to you, then rating it badly for that is ludicrous. Constructive criticism is great but criticism itself is unhelpful to others. Alternatively, you could try rating your decision or preferences as you bought the case and there ARE pictures!).

Another look I find appealing: the case really has an industrial grade look to it. If you're into computer history (or indeed were part of) and you have a longing (or nostalgia of some kind) for it, then you might see this. I somehow think it is the (is it honeycomb?) mesh grids but for whatever reason, it just reminds me of the much older days. The eye of the beholder, I suppose.

12 out of 12 people found this review helpful. Did you? Yes No

  • Kevin S.
  • 7/2/2014 10:00:04 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsA case for Serious PC Enthusiast

Pros: This case is the ultimate case for anyone that has a lot of components they need to fit for one PC. I needed two power supplies and room for a closed loop cooler, and this case has plenty of room to fit everything.

The cutouts from the top piece to the main piece are very big allowing for good cable management.

Cons: I had a problem with the top piece locking in place after it was assembled. When I went to move the case into it's final position after building the PC it came loose.

Other Thoughts: This case is huge. I knew that, and it is no problem for me because I am not storing it under a desk. But you should make sure there are no hight limitations when you want to keep this beast.

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

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Item#: N82E16811119290
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