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COOLER MASTER HAF series RC-912-KKN1 Black SECC/ ABS Plastic ATX Mid Tower Computer Case

Item #: 9B-11-119-233  |  Mfr. Part #: RC-912-KKN1  |  UNSPSC: 43201601
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    Top Favorable Review

    Great case for my first build

    -well written/drawn instructions -lots of space -well build -easy to disassemble -super bada** looking -can fit about a bajillion and five hard drives if that's your thing. -good airflow (enough for me), especially with all my fans. Read more
    — Linda S. 2/10/2011

    Top Critical Review

    Color Blind Manufacturer

    The person that assembled thias must have been color blind. I spent the better part of 3 hours trying to figure out why only the "reset" LED would come on when I plugged it in. I took the face off the front of the case, this after trying several ... Read more
    — Charles W. 12/24/2011

    Quick Info


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

    Cooler Master HAF 912 Mid Tower Chassis

    Cooler Master’s HAF 912 further enriches the HAF series by adding a compact, yet fully featured mid-tower solution for enthusiasts and budget conscious gamers alike. Its seemingly small exterior supports a plethora of interior features such as twelve devices and high end GPU cards.

    The HAF 912 embodies the rugged aesthetic and qualities of its brethren while remaining attractively priced. Its traits more closely resemble that of a mid to high-end case than that of other cases in its price range. The HAF 912 pays tribute to the legacy of HAF 932 & HAF 922 in ease of installation, high airflow, and compatibility with water cooling hardware.

    HAF 912 is the most compact solution in the HAF Series that still provides full desktop tower component support.
    The HDD cage can be easily removed to accommodate long high-end graphics cards. Rotate the cage 90 degrees to adjust your system airflow and cable management setup as you need.

    Technical Specs:

    Model RC-912-KKN1
    Color Black
    Dimension 230 x 480 x 496 mm / 9.1 x 18.9 x 19.5 inches
    Weight 17.8 lbs
    Material SECC / ABS Plastic
    M/B Type ATX / MATX
    5.25" Drive Bay 4 Exposed
    3.5" Drive Bay 1 Exposed (converted from 5.25" bay) 6 hidden
    2.5" Drive Bay 2+2 (converted from 5.25" bay) 4 hidden
    I/O Panel USB 2.0 x 2, Audio x 1, Speaker x 1
    Cooling System Front: 120 mm fan x 2, 1200 RPM, 17 dBA(one is optional,can be swapped for one 200mm fan)

    Top: 120 mm fan x 2 or 200mm fan x 1(optional)

    Rear: 120 mm fan x 1, 1200 RPM, 17 dBA

    Side: 120/140 mm fan x 1 (optional)
    Expansion Slots 7+1
    Power Supply ATX PS2 / EPS 12V (optional)
    Warranty 2 Years
    UPC Code 884102009877


    • newegg Superior Expandability and Expansive Space The Cooler Master HAF 912 boasts 4 exposed 5.25", 1 exposed (converted from 5.25" bay) and 6 hidden 3.5", 2+2 2.5" / 1.8" HDD/SSDs drive bays (via the 3.5’’ to 2.5’’ adapter) as well as 7+1 PCI expansion slots for increased expandability. 3.5’’ HDD cage can be rotated 90 degree or removed to fit long graphics cards. The bottom mounted 2.5-inch drive cage can also be mounted on top of the bottom half of the 3.5-inch drive cage if more room is needed at the bottom of the case.
    • newegg Excellent Cooling Solution – 200mm Megaflow Fans and Water Cooling Support The Cooler Master HAF 912 features one front and one rear 120mm fans and support another front 120mm (two front fans can be swapped for one 200 mm fan), one side 120/140mm and two top 120mm ( or one top 200mm ) fans for peerless air cooling performance. The HAF 912 also has pre-drilled outlets and retaining holes, and accepts two external radiator 120mm fans for building water cooling system.
    • newegg Flexible Cable Management The 16mm width between side panel and motherboard tray provides sufficient space for hiding cables. HDD cages with holes allow easy cable routing while modular notches tie cables neatly, leading to better internal airflow.
    • newegg CPU Retaining Hole and Removable Dust Filters CPU retaining hole allows easy heatsink installation and removal. The dust filters on the bottom and front cover block dust outside of the enclosure and is removable for easy cleaning.
    • newegg Support for Long Graphics Card The Cooler Master HAF 912 supports high-end graphics cards like ATI HD 5970 and NVIDIA GeForce GTX480 after the removal of the 3.5’’ HDD cage.
    • newegg Convenient Front I/O Panel and Top Platform Convenient front I/O panel offers easy access to two USB 2.0 and two audio ports. Top platform provides room for your personal belongings, like your cellphone or keys.


    Learn more about the Cooler Master RC-912-KKN1

    Customer Reviews of the Cooler Master RC-912-KKN1

    Do you own this product? WRITE A REVIEW

    5 out of 5 eggs Based on 1668 Reviews

    See all reviews

    • Filter Results
    • (1489)
    • (1)
    • (56)
    • (1)
    • Steve F.
    • Verified Owner

    5 out of 5 eggs Great budget case

    Pros: Stylish.
    Lots of drive bays.
    Lots of spots for fans
    If you're not using SSD's, the included bracket works great for holding all of your extra power supply cables.

    Cons: Ok Cooler Master, I realize this is a budget case, but could you have increased the price by 15 cents and included a couple more 5 1/4 drive bay locking clips? 4 bays, 1 clip. Really?

    Just a little more room behind the motherboard would have been nice. As it is, I had to mash the SATA cables a bit.

    I don't understand why they couldn't put in USB3.0 ports in the front. Do they cost more than a few cents extra?

    The included motherboard mounting screws are not correct. The head is much too small, so they don't make contact with the grounding points around the motherboard screw holes.

    Perhaps this is the fault of the ASUS motherboard I installed, but when I mounted it, the board is just a hair too far forward (even when pushed back as screws were tightened), so the rear panel connectors don't quite poke as far out as they should.

    No eggs off for any of this because at this price, it's hard to complain. Just things to watch out for.

    Bottom Line: Overall, this is a really good case for the price. a few sharp corners, but nothing compared to the razor sharp edges in other cases in this price range. It also includes a lot of higher end features (like a bracket to mount 2 SSDs without using a 3.5" bay) and upgrade options (you can add 4 more fans if you want, for example).

    Did you find this review helpful? Yes No

    • Noah D.

    5 out of 5 eggs Great case!

    Pros: Easy to install parts and good cable management.

    Cons: No USB 3.0. Don't know if there is an upgrade kit for it. So I bought an external USB 3.0 card reader and put it on top of the case.

    Bottom Line: I didn't buy this case off of Newegg but wanted to point how great looking case when using 200mm fans. I have one installed in the front with red LEDs and thanks to the mesh grille it looks like it's on fire. Love it!! I also have 200mm fan non LED installed on top of the case so with that in mind pay close attention to the CPU cooler clearance for the Intel i7 quad processors. Mine barely clears it. Then again I was using a fairly massive cooler.

    Overall love the case!

    Did you find this review helpful? Yes No

    • Sam M.
    • Verified Owner

    5 out of 5 eggs ***Large Mid-Tower***

    Pros: Extremely easy to set up
    Well designed
    Plenty of room for a "mid-tower" (20''Lx19''Hx9''W)
    Versitale in respect to setup

    Cons: Older model with no front 3.0 usb ports

    Bottom Line: The rebate is the real deal I received mine within 90 days

    Did you find this review helpful? Yes No

    • Jason M.
    • Verified Owner

    3 out of 5 eggs Case Cable management

    Pros: Can remove the SSD ports for better air-flow. Nice big opening on top for a fan, but wish they had a cover for it for those without the fan to place there. Super easy installation.

    Cons: My only con is there is not a lot of space behind the mobo board to hide your cables. i wish it was just a little bigger, you have to put in a lot of effort depending on your PSU to get your cables hidden well without it pushing on the chasey which makes a vibrating noise.

    Bottom Line: Good case for the price and not heavy. They got feet on the bottom to lift for the bottom air intake which is nice. Just wish there was a little more room behind the case to make cable management simpler/less effort.

    Did you find this review helpful? Yes No

    • Nicholas B.
    • Verified Owner

    5 out of 5 eggs Favorite Case

    Pros: Where to begin? Currently housing my i7-950 overclocked to 4.0 GHz and with my aftermarket CPU cooler and four fans, it stays around 35C at load. The dust filters are nice too, see the cons for my only complaint about them. This case has tremendous air flow as long as you route your cables correctly.

    This has plenty of space for cable management as long as you plan your build out first. I've got a SSD, two HDs, a disc drive, and a front plate for temp/fan speed and were it not for the massive Enermax CPU cooler, I could look through the front of the case and see out the back.

    Plenty of space for anything you need in this case, though if you were going to use up all of the available drive bays, I'd opt for a full-size tower instead for better cable management.

    All in all, this is my personal favorite computer case I've purchased/owned to date, and I recommend it to anyone building a computer that wants a mid-size tower. CM really did their homework on this one.

    Cons: Doesn't make me coffee or breakfast in the morning.

    Joking aside, the only real con I've found is cleaning the dust filters. They're not terrible to get out, but they could have done without a few clips on one side. Not enough to take an egg off by any means.
    Inside of the case is not painted black either, but I knew that when I bought it.

    Did you find this review helpful? Yes No

    • Phil K.
    • Verified Owner

    5 out of 5 eggs Slick Cheap Case

    Pros: Easy to remove unwanted parts. Great front and top ventilation. Comes with two free 120mm fans

    Cons: Looks hard to remove the mesh to clean the screens in between the casings.

    Bottom Line: Don't look any further for a nice fitting starter case unless you insist on shiny lights.

    Did you find this review helpful? Yes No

    • Steven H.
    • Verified Owner

    5 out of 5 eggs Easy install

    Pros: Case features plenty of room, and offers room between the motherboard tray and the back outside panel (which is removable, which was a huge help) for easy cable management. Hard drive bays were well located (and supposedly adjustable, although I didn't have need to test that) and allowed plenty of room to install cords.

    Cons: Not a major con, but there was not enough room between my fan/radiator for my CPU cooler ( CORSAIR Hydro Series H50 120mm Quiet Edition Liquid CPU Cooler – Intel Only) and the 200mm fan I wanted to install at the top of the case, so I had to move the 200mm fan to the front, and install a 120mm on top instead. Not enough for me to take an egg off, but it is something to be aware of if you're using a CPU cooler with a larger radiator.

    Bottom Line: For a relatively low priced case, I was extremely happy with how it functions and looks.

    Did you find this review helpful? Yes No

    • Rebecca P.
    • Verified Owner

    5 out of 5 eggs Fantastic for Beginners - LIKE ME!

    Pros: Easy to take of side Panels
    Comes with 2 fans
    Very nice and easy to install HDD and SSD
    Comes with Brackets and Cable Ties for cable management
    Cables can be routed underneath motherboard
    Very VERY Spacious

    Cons: The Front Panel USB, Headphone jack, and MIC jack all feel cheaply made

    Bottom Line: Extremely nice for beginners, it DOES fit Micro ATX boards like the description said as that is what i put into it. I have a 3 year old OEM and i wanted a bigger case for for better air flow and it fits and breathes just fine.

    I will be ordering another one in about 1-2 weeks for my newer build that ill be working on, I LOVE IT THAT MUCH <3

    Seriously though, if youre a beginner, and you like simple, open cases that are easy to use and set up, this is the case for you.

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

    • Stephen M.
    • Verified Owner

    5 out of 5 eggs Really Good Case

    Pros: This case excels in every category I care about. It looks nice. It's build well. There is plenty of space. You have good airflow options. You have pretty good cable management, and the price is fair.

    Cons: While there is space for more this case only comes with 2 fans. There are slots for cable management, but they are open no grommets. There is no basement the power supply and cables coming from it are open. The 5.25 bay covers are a little flimsy. For the price you can't really expect all that which is why I didn't subtract any eggs.

    Bottom Line: I would buy this case again.

    Did you find this review helpful? Yes No

    • Mr. p.
    • Verified Owner

    5 out of 5 eggs great cooler

    Pros: went back and forth with the idea of water cooling my 4790k but, i'm not overclocking it or anything crazy. i bought this and added corsair 2 sp120 fans with the mounts included in the evo kit. stable system, no heat issues!

    Cons: n/a

    Did you find this review helpful? Yes No