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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
$69.99 Save: $10.00 (14%)
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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 1594 Reviews

    See all reviews

    • Filter Results
    • (1419)
    • (1)
    • (54)
    • (1)
    • babanna s.
    • Verified Owner

    2 out of 5 eggs

    Pros: Decent airflow

    Cons: No USB 3 only USB 2

    Manufacturer Responses:

    Good Evening You can upgrade your HAF 912 with our HAF 912 USB 3.0 5.25" Bracket - OEM Package [621024410-GP] through our CM Store at the link below. You can also register your case through our CM Fanzone for some additional support such as RMA, Parts, Request, Live Chat, and Support Ticket. Please let me know for further questions. Regards, Felinni M. CMUSA Support 1-888-624-5099

    Did you find this review helpful? Yes No

    • Jesse H.
    • Verified Owner

    5 out of 5 eggs Great case!

    Pros: Big case, Lots of airflow, looks great, lots of room, plenty of optical drive bays and hard drive bays. I have 4 hard drives in raid, still have room to slap an ssd in it if I want. Looks beefy, the 922 and 932 are too freaking huge in my opinion. They are great cases too though. I have built over a thousand custom built pc's and this is the one I personally use in my gaming computer. I bought a a big blue fan and installed it on the top of the pc. I bought 2, blue 12" cold cathode lights and it looks fantastic! Goldie locks and the three bears " Not too big, not too small, it's just right"

    Cons: No clear side panel

    Bottom Line: They may have this option, but allow a clear side panel upgrade? It's not that big of a deal though. The Half 923?

    Did you find this review helpful? Yes No

    • Cynthia H.
    • Verified Owner

    3 out of 5 eggs It's an OK case

    Pros: The price. Great for a budget build!

    Cons: When I bought this back a year ago it did not come with the right motherboard screws. The standoffs needed a finer thread. I ordered some and took care of the issue. A little frustrating when you have all the components, but a simple issue henders the build process.

    Bottom Line: The cable management is a little hard, but you can achieve great wiring with a little patience. The case was used in my first build and now I'm using it again for a second build. Due to the fact I didn't have enough money to replace it, but eventually I will.

    Did you find this review helpful? Yes No

    • BENCE E.
    • Verified Owner

    2 out of 5 eggs More of the same

    Pros: The case is wonderfully designed and was very easy to use (exceptions below). The interior is roomy, and there is enough drive bays for anything you can possibly imagine.

    The air circulation in the case is outstanding. If you plan on overclocking and using aftermarket cooling solutions, this case is for you.

    Cons: Nice case for the money over all. There are a few issues with it, that must be addressed. My main "beef" with the case is the quality of fans provided. Within ONE DAY the front case fan started making ticking noises. The sound is considerable, and distracting. This will be the second HAF case with this type of problem. (my 1st being the 932) The front of the case will only accept 120MM fans. This is just a bad design, as all COOLERMASTER really needs to do is punch a few holes in the sheet metal. -1egg for faulty fan. (sounds like a card in bicycle spokes. checked it for clearance, the noise is coming from within the housing itself, not from the blades)

    I will never buy a coolermaster fan because of this flaw. >ever<.

    The perforations all over the case lead to structural issues, and the case is prone to warping.

    Finally, the interior SSD bay is a piece of junk. It does not even line up with the holes drilled for it, and looks like someone stepped on it. That type of quality control is garbage. I should not have to use pliers to bend hardware into shape. - 1 egg

    The "rapid release" on the 5 inch bays is useless, as it fails to hold a CD drive still enough to prevent rattling. I just removed it and used screws.

    Finally there is a sharp edge on this case that gave me a significant cut, and it was near one of the wiring cutouts. I am glad I found it with my finger instead of with a power cable. -1 egg.

    Finally, the rubber grommets on the back pop out with little provocation but are a beast to pop back into place. Expect a fight if you plan on routing cables through them.

    Bottom Line: Overall, if you can get this case for 40-50 bucks, it is worth it. Expect to purchase at least an extra 120MM fan. I am just tired of the poor quality control of CM products.

    Manufacturer Responses:

    Good Morning Emily, I apologize your HAF 912 is not working correctly as we can replace the defective fans through our CM Fanzone along with your purchase invoice and serial number at the link below as a Parts Request. We can also discuss your concerns through Live Chat, Phone and Support Ticket. I look forward to your response. Regards, Felinni M. CMUSA Support 1-888-624-5099

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

    • Aleshia Q.
    • Verified Owner

    5 out of 5 eggs wonderful

    Pros: it looks pretty awesome in person. This is the first time building a pc and im very very happy how everything came out.

    Cons: the only issue i had with this is the grounding mounts it wasnt staying on the case so when i put the motherboard in and tighten it down it made this squeak noise and it was stripping it but all in all love the case

    Did you find this review helpful? Yes No

    • Rob w.

    5 out of 5 eggs Amazing case

    Pros: A lot of space
    Tons of HD slots
    Fits a 1300 Watt PSU and 2 Raedon HD7970 GPU cards

    Cons: none

    Did you find this review helpful? Yes No

    • Rocko G.
    • Verified Owner

    5 out of 5 eggs Good airflow and not too big

    Pros: For the price, this is a steal... Not too big, but everything fits inside. I5 + gtx760, running cool and tower looks awesome actually

    Cons: None that I see.

    Did you find this review helpful? Yes No

    • sher v.
    • Verified Owner

    5 out of 5 eggs Great case

    Pros: Lots of room to work with good cable routing and it fits my Hyper Evo 212 cpu cooler. I don't have to worry about leaving the side panel open and sucking in dust since my room gets super dusty. Overall this is a great case for a great price.

    Cons: none

    Bottom Line: before you put your mother board in if you have the hyper 212 Evo cpu cooler make sure you plug in the cpu 1 and 2 power cable cords first cause the corner is very narrows you can always take the cpu cooler fan off for more space

    Did you find this review helpful? Yes No

    • Lucas H.
    • Verified Owner

    5 out of 5 eggs Very Nice

    Pros: This thing is nice. For the price you pay it is really worth it. And it gives you some good options for fans. I am using the maximum amount of fans you can on this case.

    Cons: I was working on this case and I sliced my finger open and It almost needed stitches it was really bad so be careful but I did not find this a good enough reason take a star off.

    Did you find this review helpful? Yes No

    • EARL L.
    • Verified Owner

    5 out of 5 eggs The ONE for all new builds

    Pros: I have 2 of these cases. One houses a FX8350 with a H60 water cooler. I added a top fan and side fan. Temps are beautiful...20C. Utilizing Win Pro 8.1. 32gb of Gskill. 250 SSD. 1 1G and 2G harddrives. GTX 760. LG Blu-ray DVD burner and a LG DVD burner. 750psu. 3 usb attached drives. All connected to a MSI G46 Gaming Board. Origrinally was using the Asus MA5990X Pro, it died so this was the replacement. Not a bad choice in an emergency situation. This case just made everything feel at home and is highly appreciated. The other case houses a AMD 6300. Both cases have fulfilled my 2 recent builds with 10 stars each,if I was allowed. Both were delivered in 2 days. The garden state has provided us with great Newegg service.(only items I received from cal. were not up to standard. lol. The cases remind me of the Addtronics cases I purchased years ago. Made of steel and sturdy.

    Cons: No lights on the front of the case. Its hard to see the usb ports with no lights on. Will try and find a led diode, small or some colored tape. This not a con. Just a comment.

    Bottom Line: I find this case to be winner. get 1 or 2.

    Did you find this review helpful? Yes No