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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 1632 Reviews

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    • Filter Results
    • (1455)
    • (1)
    • (56)
    • (1)
    • Anonymous
    • Verified Owner

    5 out of 5 eggs Fantastic Purchase - Highly Recommended

    Pros: Pretty much everything.
    - The case is very solid, no lose/rattling parts, I wouldn't be surprised if it withstood my chainsaw. (just kidding)
    - The case comes with ample amount of parts. I think this will be the first time I actually have a product where I will never be using the extra parts, because there are so many of them (a good thing)
    - The aesthetics suit my liking fairly well. There aren't any fancy LED's stretching across the whole case, or a fancy clear side panel, but for a value case, I am happy.
    - The airflow is amazing. No complaints at all. Stress tested it using speed fan and played Battlefield 4 max setting for 2 hours, skyrim max settings for 2 hours, and some other games. Temps stayed below 40C
    - The case had plenty of room, as it fit 3 HDD's, a solid state, crossfire GPU'S and my hyper Evo 212 with 2 fans on each side of the heatsinc! (which is a first for me). But it is not ever sized either.
    - If the rating went up to 1000, I would choose a 1000. Case is HIGHLY recommended!

    Cons: While on my morning train to work, for about 30 minutes, I tried to think of a con to put up. The only thing I could think of was that the zip ties were too small.

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

    • justin D.
    • Verified Owner

    5 out of 5 eggs This case allowed me to create a cool and quiet machine

    Pros: Easily the best case for 60$

    I built two machines using this case and both were fun to work in not a hassle.

    Can hide the wires from the power supply

    Can take out the hard drive bay for more airflow which is what I did

    Comes with a SSD bracket (really comes with a lot of extra goodies for those just in case moments)

    Supports 2 200nm fans which is what I bought for both machines (coolermaster megaflow is fantastic)

    Cons: USB 2.0 still

    The 2 fans it comes with are not enough unless you have a lower temp CPU and the fans are real loud at full load.

    Bottom Line: Lots of room to work in and I think it’s a great case for the money.

    Also the case is so big that all my fans actually turn off when doing normal things with the stock Intel heat-sink(with a smaller case heat was trapped more). My board stays at 42C as well.

    Power supply: Corsair 750watt RM fan never turned on since I use 300 watts max in gaming (tested with crysis 3 and a Kill A watt meter)

    GPU: GTX 970 MSI fans once again turn off doing light tasks

    CPU: I7 4790K Stock heat-sink during gaming and the setup above it reaches 70-80C which is fine and during normal use its at <50C which is when my case fans turn off. Getting a 212+ cooler with a COUGAR CF-V12H fan so it can stay very quiet.

    I’m writing this review for someone if they want a cool and extremely quiet machine they know where to look. Also I know many will disagree but I don’t like flashy cases so spending the extra 40$ on the fans was still 100$ and I don’t get that type of cooling with any other case. Keep in mind the bigger the fan the more CFM that can come in with less sound.

    Did you find this review helpful? Yes No

    • Danny F.
    • Verified Owner

    5 out of 5 eggs Real Nice Case

    Pros: - Good airflow
    - Very solid design
    - Easy access to everything
    - Comes with HDD brackets, very easy installation
    - Includes a set of HDD brackets for every drive bay
    - Includes adapter for 2.5in HDD. Great for SSD's
    - Solid power and reset button
    - Easy setup, cable management
    - Awesome price

    Cons: - Case does not show off all my LED's
    - Does not cook eggs
    - Lacks a good location for little stickers that come with a CPU

    Bottom Line: My friend has a HAF case. After inspecting his and seeing how it has stood the test of time, I decided to purchase one. He has had his for about 2 years. Neither of us have had issues setting it up or maintaining it.

    Did you find this review helpful? Yes No

    • Travis F.
    • Verified Owner

    5 out of 5 eggs Amazing Case

    Pros: Sturdy build, great cable management, versatile power supply mounting (fan can be pointed up or down), mounting spaces for large number of fans, tool-less, great looks.

    Cons: None

    Bottom Line: Awesome case for the money. Literally my favorite case that I have ever bought. You cannot go wrong with this case.

    Did you find this review helpful? Yes No

    • Joseph F.
    • Verified Owner

    5 out of 5 eggs HAF case

    Pros: Awesome case..perfect fan placement and number of fans....solid build and perfect paint...i could see myself using this case forever unless form factors change ha

    Cons: .I love everything about this case other than the 2.5" drive thingy on the bottom of the case is just in a horrible spot especially with a modular power just isnt useable...

    Did you find this review helpful? Yes No

    • DENITA C.
    • Verified Owner

    5 out of 5 eggs Good cheap case.

    Pros: It's a nice case. There is plenty of open space to keep all of your components cool. It doesn't have all the flashiness and lights of more expensive cases, but it gets the job done. The power and HD led's are red.

    Cons: The directions could have been a little better for the tool-less installation of the 5.25" and 3.5" drives, but it is easy enough to figure it out.

    Bottom Line: If you need a basic high-airflow case, this will get the job done, and it really doesn't look bad.

    Did you find this review helpful? Yes No

    • Zach M.
    • Verified Owner

    4 out of 5 eggs Great Case, Great Price, Great Service

    Pros: Inexpensive, classy looking case. Includes 2 case fans, tons of space for activities

    Cons: None

    Bottom Line: If you want a nice mid tower with great air flow and plenty of room for installing new hardware, you can't go wrong here...I paid for it at noon one day, and paid for the 4 day shipping and it showed up at my house the next day. Not bad.

    Did you find this review helpful? Yes No

    • Chris M.
    • Verified Owner

    5 out of 5 eggs Excellent Case!

    Pros: A lot of room for your hands to work on. Very easy wire management. Gives you all hardware required to do a motherboard installation. Very easy to work with. Provides great cooling efficiency.

    Cons: Maybe more fans besides the one in the front and back. At least provide one for the side and top. You have to purchase your own if you desire.

    Bottom Line: None

    Did you find this review helpful? Yes No

    • Tianyu W.
    • Verified Owner

    4 out of 5 eggs Some Case Rattling

    Pros: Good room, lots of screws, no flashy lights (i like this about cases), lots of ventilation.

    Cons: the rubber support for PSU flimsy. Broke almost instantly when i try to move the PSU by a bit. not a big deal really.

    Since i live in NYC, there are lots of subways, and sometimes subway train underground creates a subtle vibration. I started noticing a little "metal rattling" sound from the case, and at first I thought it's cables hitting fan hitting the metal case but found out it's the mesh/grill part for the rear fan that's creating this noise. Fortunately, after a while, i finally made it stop by playing around with the screw tightness around the fan, and putting some padding on the bottom of the case.

    Also, the 2.5" cage isn't made to actually just-fit 2.5" drives... you actually need to screw in the 2.5" drives so that the 2.5" cage will tighten enough to mount on top of the front-bottom 3.5" drive bays, or the screw holes don't line up. So far i have no problem with the drives, but not sure if the extra torque going to create problems later?

    Did you find this review helpful? Yes No

    • Matthew G.
    • Verified Owner

    5 out of 5 eggs

    Pros: You can fit anything you want and has several locations for extra fans if you need to. Easy to lock in anything.

    Cons: It's a bit bigger than an ordinary case in width. Not that bad for a con. Instructions a bit difficult.

    Bottom Line: it's a good cheap case.

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