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Cooler Master > 
Item#: N82E16811119225

Cooler Master HAF X - High Air Flow Full Tower Computer Case with Windowed Side Panel and USB 3.0 Ports

  • Black
  • Steel / Plastic
  • USB 3.0 x 2 ,USB 2.0 x 2, Audio x 1, Mic x 1, e-SATA x 1, 1394a x 1 Front Ports
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
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Cooler Master HAF X Full Tower Chassis

The case that is held up as the benchmark for full towers, HAF X has remained the flagship of the highly popular High Air Flow Series (HAF). Its rugged militaristic design offers a tough casing that provides outstanding protection while providing an unprecedented ease of use when it comes to building and managing a complex and powerful system. This extends to support for the latest graphics cards and components.

The HAF X can handle up to four full length graphics cards.
Using micromesh filters located in the front bezel, top exhausts, side panel, and bottom floor, the HAF X is resistant to dust buildup.
A high airflow design strives to eliminate overheating with Large 200 and 230mm fans that spin at lower RPMs to ensure high Airflow without high noise.
There are two X-Dock bays at the front that are compatible with up to two 3.5” or 2.5” drives.
Two front ports are USB 3.0 and compatible with SuperSpeed USB. The HAF X ports are backwards compatible with USB 2.0.

Technical Specs:

Available Color Black
Materials: Case body: Steel
Front and Top Mesh: Plastic
Dimensions (W/H/D) 9.1(W) x 21.7(H) x 23.2(D) inch
Weight 31.6 lbs
M/B Type Micro-ATX, ATX, E-ATX, XL-ATX
5.25" Drive Bay 6
3.5" Drive Bay 5 hidden
2.5"/3.5" Drive Bay 2 (converted from 5.25" drive bay)
I/O Panel USB 3.0 x 2 (Internal)
USB 2.0 x 2
Audio x 1
Mic x 1
e-SATA x 1
1394a x 1
Expansion Slots 9
Cooling System Front: 230 x 30mm red LED fan, 700RPM, 19dBA / 110CFM
Top: 200mm x 30mm fan x 2, 700RPM, 19dBA, 110CFM (one optional)
Rear: 140 x 25mm Fan x 1, 1000RPM, 19dBA, 61CFM
VGA Fan Duct: 120 x 25mm or 120 x 38mm fan x 1 (optional)
VGA Holder: 80 x 15mm fan x 1 (optional)
Power Supply Bottom mounted / ATX PS2
Water Cooling Compatibility Top: 360mm Radiator (3 x 120mm fan)


  • newegg SATA Dock The Cooler Master RC-942-KKN1 features SATA dock to provide easy installation without removing side panel.
  • newegg USB 3.0 on Front I/O Panel The convenient front I/O panel enables easy access to two USB 3.0 ports, two USB 2.0 ports, one eSATA port, one IEEE 1394 port and two audio ports.
  • newegg Supreme Expandability Boasting six 5.25" external drive bays, and five 3.5” drive bays, the Cooler Master RC-942-KKN1 case provides great expandability for future upgrade. And the nine expansion slot supports 3-way and 4-way SLI, and Quad CrossFireX, perfect for hard-core game enthusiast.
  • newegg Peerless Cooling Performance The Cooler Master RC-942-KKN1 case features one 230mm front red LED on/off fan, one 140mm rear fan, one 200mm top and one 200mm side fan, as well as the air duct for exceptional cooling performance.
  • newegg Transparent Side Panel Window The Cooler Master RC-942-KKN1 case features a transparent side panel window to provide a direct view of the inner system. The red LEDs add stylishness and eye-catching fun.
  • newegg Cable Management The Cooler Master RC-942-KKN1 features a cable management system with rubber grommets for better, easier cable routing and neatness. Not only will your case look neat, but air will have no problem getting to the common hot spots.

Learn more about the Cooler Master RC-942-KKN1

Quick Info


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

Customer Reviews of the Cooler Master RC-942-KKN1

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  • Anthony S.
  • 11/11/2014 6:31:24 AM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsUseful case but it has its flaws

Pros: Its HUGE. The front/back space is enormous and you don't really even have to tie anything down in the back to be able to close the back panel. Comes with 3 200mm fans and the ability to have a big side-case-fan which is very useful if you're going to have aftermarket cooler cards in sli, giving those cards adequate airflow or exhaust. It is very spacious (except for one part which I'll get to in the cons) and has a lot of cool features. This case's forte is cooling gpus. It was made for the fermi cards (gtx 400-500 series) which ran incredibly hot, and the sidefan was meant to blow air onto the pcb pipes of the gpu. Its not really needed for blower-type cards anymore but is still very useful for acx sli cards as I've said before.

Cons: Even though the case is huge, the top compartment for whatever reason, is not. There's a few rails on the top which make putting in a radiator and fan AND routing the cpu power around the back almost impossible. You can still route it around the front but that kind of defeats the purpose of cable management. Also, its VERY hard to get wires up and around the top since there's only 1 very small opening to do so. Would've been a perfect case if the top compartment had some bigger openings with rubber grommets and the radiator mounting rails were higher up. There's also a lack of rubber grommet openings on the bottom beneath the motherboard, but that's probably just due to the case having the abillity to house extended ATX boards, which is just a trade off you have to live with.

Also the backplate openeing on the case is too small to put brackets behind the motherboard while its in the case, but not really a big deal.

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  • Linda M.
  • 11/9/2014 8:02:09 PM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsBest Case!

Pros: Great size case
Well layed out
Plenty of room for cable magagement

Cons: None.

Other Thoughts: Price, if you can get is on sale it's better. I got it at regular price but, still I think this case is epic

Did you find this review helpful? Yes No

  • Cyndee L.
  • 11/5/2014 11:24:43 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week

3 out of 5 eggsNot worth the price - Far better options

Pros: Very Very roomy
Usb 3.0 on Front Panel
200mm fans
looks great!
some good coolermaster engineering (wire routing grommets, sliding power/led button shield, easy to use hdd and 5 1/4" drive bays)
Large window w/ 200mm fan
great packaging

Cons: I do have many problems with this case. There is a psu cover to hide your cords, which may be removable, but is extremely hard to place on again and route wires through when the build is finished.
my usb 3.0 front header came 1. way too short to reach my mobo in a clean looking way, and 2. filled with plastic shavings! which bent my mobo's pins to the point of it barely plugging in even after i fixed it all, and it does not hold in place easily, if you even somewhat touch it, it will fall out.
On my right side panel, not only are both panels extremely loud and hard to get on, the places of which the screws go into are drilled in the wrong places, it came with the top screw jammed between the panel and the main frame, and after i got both screws out it wasnt actually even on, it just fell off.

Other Thoughts: I am looking at it right now with my build finished, it looks great, and i feel that it will serve very well, even though it caused many problems during the build process.
Actually, it looks like the cooler master logo isn't even straight...
I thought that the build quality on a $180+ case would be far better..

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  • Troy P.
  • 10/23/2014 2:20:12 PM
  • Tech Level: Average
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsBeware no way to get parts

Pros: Solid and big. Looks cool.

Cons: I've had this for a while now and long enough to change my system a bit. To my surprise there is no way to get parts off the US website. I had to order from Norway to get a new HDD tray and an SSD tray (it only comes with one). I also wanted a face plate for sd card reader. Bottom line check their website if you plan on needing any extra parts more than likely they don't sell them anymore.

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  • John M.
  • 10/17/2014 10:41:23 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsCool Mastere HAF X Hight tower case

Pros: Impressive looking. Has 6 front 5 1/4 slots

Cons: No real instruction manual. USB 3 Port broke - blue plastic pulled out with USB stick.
I am unable to find a way to order a new part under warrantee or pay.
Web page won't take the serial number on the case and stops me from progressing.

Other Thoughts: Web page could be greatly improved as could the instruction manual for a $200.00 case.

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  • Lia F.
  • 9/14/2014 8:59:55 AM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsSo much room!

Pros: Amazing space! Quiet fans. The easy-click drives are fantastic.

Cons: Need to buy extra sata ports for all this adaptability. And yes, fully loaded, this beast is heavy.

Other Thoughts: LOVE this case - it was everything I needed for adaptability for maintaining current build and updating. Only problem - came with a broken wheel and no idea how to get just that piece.

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  • Visa .
  • 9/13/2014 6:36:28 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGreat

Pros: -Huge
-Lot of USB ports
-Easy to build with

Cons: -Can be too big. It cleared under the desk with only 1/3 of an inch.

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

  • Matt V.
  • 9/13/2014 2:11:32 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsReally good case

Pros: Has 6 external 5.25" bays which I use for externally accessible HDD bays. The case itself actually has 2 of these by default in the bottom 2 slots which can be removed.
Plenty of room for CPU coolers.
9 expansion slots
Good build quality

Cons: Could have a little more space behind the motherboard for cables.

Had to take off the side fan's duct because the cables from my RAID card were in the way. Shouldn't be a problem for normal setups.

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

  • Dominic C.
  • 9/12/2014 7:29:47 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsDid not like this case

Pros: It's a hunk of metal with some cases made on the inside, wow big deal.

Cons: The fans in this case did not work at all. The connectors were broken and torn out on some fans.

Manufacturer Response:

Good Morning Dominic,

I apologize your HAF X fans are not working correctly as I can send you a replacement through our CM Fanzone Parts Request at the link below along with your purchase invoice and serial number.

I look forward to your response.

Felinni M.
CMUSA Support
Monday - Friday 9:00 AM - 5:00 PM PST

0 out of 5 people found this review helpful. Did you? Yes No

  • Timothy H.
  • 9/11/2014 10:06:58 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsAwesome

Pros: Case is extremely well built and has plenty of space inside to work with. Looks fantastic and was easy to configure and install.

Cons: Does not come with a 2nd 200mm top fan. Only having 1 should provide plenty of cooling though.

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

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Item#: N82E16811119225
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