Skip to: |

NeweggBusiness - A great place to buy computers, computer parts, electronics, software, accessories, and DVDs online. With great prices, fast shipping, and top-rated customer service - once you know, you Newegg.

If you are reading this message, Please click this link to reload this page.(Do not use your browser's "Refresh" button). Please email us if you're running the latest version of your browser and you still see this message.

NeweggBusiness - Computer Parts, Laptops, Electronics, HDTVs, Digital Cameras and More!

Add to Cart

More Buying Options

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
$69.99 Save: $10.00 (14%)
Free Shipping Available Additional Shipping Information

    Don't Miss Out on Exclusive Offers!

    Invalid e-mail address


    Great case for my first build

    5 out of 5 eggs
    -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.
    — Linda S. 2/10/2011

    An amazing bang for my buck.

    5 out of 5 eggs
    When I finally got it home I realized that the HAF 912 is very huge for a little guy. It is wider than my CM 690 II, but alsso not a tall. In the inside there are room for 2 optional 200mm fans. I will get 2 blue megaflow fans to increase the airflow. The cable management is perfect, the holes are all in the right areas. There is more than enough room behind the motherboard tray for all the cables. Oh, the CPU retention hole matches my motherboard perfectly.
    — Jonathon L. 9/9/2010

    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 1576 Reviews

    See all reviews

    • Filter Results
    • (1402)
    • (1)
    • (52)
    • (1)
    • Christopher S.
    • Verified Owner

    5 out of 5 eggs Excellent Case

    Pros: Plenty of room for all my components
    Competitive price (I got it on sale)
    Room for 6 120mm fans
    Excellent breathability and airflow
    This case fit my Hyper 212 EVO on my AMD FX processor with room to spare

    Cons: A little on the large side
    It's not super flashy, if that's what you are looking for

    Bottom Line: I am a first time PC builder. This case made installation a breeze. It fit all my components with ease. It has good cable management, and it is super simple to install optical drives, HDD's, and SSD's. I look forward to installing another build in it years down the road.

    Did you find this review helpful? Yes No

    • Robert N.
    • Verified Owner

    5 out of 5 eggs

    Pros: Lots of space. Decent case.

    Cons: The plastic on the top and front makes it look cheap.

    Did you find this review helpful? Yes No

    • Sherrie R.
    • Verified Owner

    4 out of 5 eggs Nice case for the price

    Pros: - Arrived with no damage (Well one of the 5.25" drive bay doors came broken sadly i had to glue it on)
    - Decent Looks
    - Roomy
    - Decent Cable Management
    - Has access to the Motherboard back plate
    - Nice room for 200mm fan on top and front i got so i took the front 120mm stuck it on the side panel so a total of 2 200mm and 2 120mm fans for decent cooling.

    Cons: - Broken 5.25" drive door
    - Only 2 Thumb screws on the back
    - Unpainted interior (Although the price is low for the quality of the case)
    - Stock Case Fans have small wires
    - No Dust filters for front intake (A Cheap mesh)

    Bottom Line: - I recommend getting a modular PSU as this case could be a lot less cluttered with one (I have a non modular and its fine though i only have decent cable management with it).

    - Could be a bit more roomy behind the motherboard (Not terrible would be nice though)

    Did you find this review helpful? Yes No

    • Terrence O.
    • Verified Owner

    5 out of 5 eggs Great case

    Pros: This thing is big. Plenty of room for everything I need. I had to take out the higher HD cage (4 screws) so my ASUS R9280X-DC2T graphics card would fit but since I did there's more than enough room. Came with everything I needed to mount and organize. Big fans. Couldn't ask for more.

    Cons: None

    Did you find this review helpful? Yes No

    • Emre C.
    • Verified Owner

    5 out of 5 eggs I love it.

    Pros: The case has great airflow and can hold up six 120mm fans or two 200mm and one 120mm or two 140mm and 4 120mm fans. Has great aesthetics and is large enough to hold basically any gpu and cpu cooler (well maybe not the huge noctua ones)

    Cons: Dust filters don't work so well but that would be expected for this price. Doesn't have vast internal water cooling support but usually if you are water cooling you would get a fancier case

    Bottom Line: I have had this case for about 8 months now and it is fantastic, I have added a side panel and spray painted the inside black and now it looks even better, its very moddable. Definitely my favorite case.

    Did you find this review helpful? Yes No

    • austin d.
    • Verified Owner

    5 out of 5 eggs darn good case

    Pros: ive owned this case more than once, its has been superb for airflow, amount of hard drives, tons spots for cooling, it can support 2 200mm fans, 3 140mm or like 6 120mm. and the cable management could be better like an extra 5mm but ive gotten so good its not an issue.

    Cons: none

    Did you find this review helpful? Yes No

    • Aaron L.
    • Verified Owner

    4 out of 5 eggs I love this Case!

    Pros: I love this case. The price is good even when not on sale and the case has a good design allowing room for larger video cards. You can even remove a hard drive cage if you need be. I bought two of them to replace my antec 902 and 902se.

    Cons: Only comes with a front and rear fan.

    Bottom Line: I added a red led cooler master 200mm mega to the top and replaced the front oem fan with the same. Then added a red 140mm cooler master to the side cover. The case has a wicked look with the red fans

    Did you find this review helpful? Yes No

    • Anonymous
    • Verified Owner

    2 out of 5 eggs Very stressful

    Pros: It's overall a good case.

    Cons: Literally came with two standoff screws installed into the case. The other 10 that came in the bag included with the case were too big in diameter to fit into the motherboard to hold it into place. Kind of hard to explain but basically one should be able to set the motherboard onto the standoff screws and get a locking sort of effect because the tip of the standoff screw is supposed to be smaller to fit into the hole of the mobo. This was not the case for what I received and now I took apart my whole pc only to find that I have to reassemble it with my old case.

    Bottom Line: Way too much trouble.

    Manufacturer Responses:

    Greetings Georgio, I apologize for the inconvenience, you can register your HAF 912 at our Fanzone along with your purchase invoice and serial number at the following links. I appreciate the constructive feedback and will forward this to our team. Please let me know for further questions and concerns. Regards, Felinni M. CMUSA Support 1-888-624-5099

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

    • Andrew L.
    • Verified Owner

    5 out of 5 eggs Can't go wrong

    Pros: Space. Layout. Build quality. Plenty of screws and accessories. Good directions. It really is worth every penny you pay and more.

    Cons: Really, if you must nitpick it's the absence of USB 3.0 header but man, that is minor. Buy this case and sink the savings into your GPU. OhMyGerd-THERE'S NO PAINT ON THE INSIDE, EITHER! The humanity.

    Bottom Line: Shopped around for two weeks online and compared and this is just one great case.

    Did you find this review helpful? Yes No

    • Julie R.
    • Verified Owner

    5 out of 5 eggs Amazing!!!!!

    Pros: Hands down amazing.

    Cons: Non so far.

    Did you find this review helpful? Yes No