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Cooler Master Cosmos II XL-ATX Ultra Tower Case Black 3X5.25 13X3.5INT No PS Front USB & Sound

Cooler Master Cosmos II XL-ATX Ultra Tower Case Black 3X5.25 13X3.5INT No PS Front USB & Sound - 1
Actual product may not be exactly as shown.
Cooler Master Cosmos II XL-ATX Ultra Tower Case Black 3X5.25 13X3.5INT No PS Front USB & Sound - 67337_l.jpg Cooler Master Cosmos II XL-ATX Ultra Tower Case Black 3X5.25 13X3.5INT No PS Front USB & Sound - 67337_1.jpg Cooler Master Cosmos II XL-ATX Ultra Tower Case Black 3X5.25 13X3.5INT No PS Front USB & Sound - 67337_2.jpg Cooler Master Cosmos II XL-ATX Ultra Tower Case Black 3X5.25 13X3.5INT No PS Front USB & Sound - 67337_3.jpg Cooler Master Cosmos II XL-ATX Ultra Tower Case Black 3X5.25 13X3.5INT No PS Front USB & Sound - 67337_4.jpg Customer Photos (0)
Reg. Price: $487.75  CAD
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   Shipping Weight:   57 lbs
   Part #: RC-1200-KKN1
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Features    [ Edit | History ]

Incomparable in design and specifications, the Cosmos II comes in as one of the first Ultra Tower chassis. Inspired by luxurious supercars, the exterior of the Cosmos II melds aluminum, steel, and mesh into an elegant artistic piece. It maintains its trademark Cosmos profile and outlook with its reinforced aluminum rails while being further refined for today's advancements in air/water cooling, peripheral support, and styling. Large swinging aluminum side panels and sliding doors lend to its stylish and smooth movements to access ports, drives, and system hardware. With the Cosmos II, build as you wish as the options are endless.

Quick Specs:
Material Aluminum Steel Rubber
Motherboard Supported XL-ATX SSI CEB SSI EEB ATX Micro ATX EATX
Limited Warranty 2 Year
Weight (Approximate) 48.50 lb
Color Midnight Black
Form Factor Full-tower
Height 27.7"
Width 13.5"
Depth 26.1"
Number of Fans Supported 10
Number of Fans Installed 5
Number of External 3.5" Bays 2
Number of External 5.25" Bays 3
Number of Power Supplies Supported 1
Number of Power Supplies Installed No
Number of Internal 3.5" Bays 11
Number of Total Expansion Bays 16
Number of Total Expansion Slots 11
Total Number of USB Ports 6
Total Number of Audio Out Ports 1

Specifications    [ Edit | History ]
     Number of External 3.5" Bays: 2
     Number of External 5.25" Bays: 3
     Number of Internal 3.5" Bays: 11
     Number of Total Expansion Bays: 16
General Information  
     Brand Name: Cooler Master
     Manufacturer: Cooler Master Co., Ltd
     Manufacturer Part Number: RC-1200-KKN1
     Manufacturer Website Address:
     Product Line: Cosmos
     Product Model: RC-1200-KKN1
     Product Name: Cosmos II RC-1200-KKN1 System Cabinet
     Product Series: II
     Product Type: Computer Case
I/O Expansions  
     Number of Total Expansion Slots: 11
     eSATA: Yes
     Front Audio In: Yes
     Front Audio Out: Yes
     Front USB: Yes
     Total Number of Audio Out Ports: 1
     Total Number of USB Ports: 6
Physical Characteristics  
     Color: Midnight Black
     Depth: 26.1" (664 mm)
     Form Factor: Full-tower
     Height: 27.7" (704 mm)
     Material: Aluminum
     Weight (Approximate): 22 kg
     Width: 13.5" (344 mm)
Power Description  
     Number of Power Supplies Installed: No
     Number of Power Supplies Supported: 1
Technical Information  
     Motherboard Supported: XL-ATX
Micro ATX
     Number of Fans Installed: 5
     Number of Fans Supported: 10
     Limited Warranty: 2 Year

COOLERMASTER RC-1200-KKN1 Customer Reviews

Product reviews on are screened for relevance and inappropriate content. Reviews may contain inaccurate information about the product. If there is a discrepancy, please use the Flag this Review link located beside each review. Reviews are not an endorsement expressed by, but opinions from customers based on their own experience with a product. We do not recommend you make purchasing decisions based on facts or opinions expressed regarding COOLERMASTER RC-1200-KKN1 reviews.
Experience: 27 Days
 Verified Owner
BIG AND SPACIOUS. and Incredibly handsome.
LOTS of fan wires...
I love this case.
You can fit anything you want ideal for custom pc.
Ideal for water cooling.
So if you got space and want something good looking this is your case.

Tareyu Eyre
Experience: 2 Weeks
Huge, very good airflow, cable management, look, fan settings buttons, 13 hdd, 10 fans
This is the second case that I buy since I custom my computer. I was amazed at the weight and durable quality of the computer case. Ergonomic and portable with two handles. Space much thought. I can take up to 13 hard drives and 10 fans. Well ventilated. This is the ideal case for modding.

Experience: 2 Days
-Huge, so much room to do things!
-if some one tries to steal this fully loaded, i bid them goodluck
=lots of grommits for cable managment and super sturdy
my biggest anger with this case is the cooling, if you are an averge guy that wants the nicest looking case around, but does not want to deal with the hassel of watercooling (custom) kits, you are pretty screwed. after loading this thing with as many fans as possible the ammount of airflow was sad. the side panel has room for only 2 120mm fans, being this is such a huge case youd think there would be ALOT MORE! that is why im giving this a 3 stars. dont be deceived by looks as i was. THIS IS A CUSTOM WATER COOLING CASE!!!!
IT IS BEING RETURNED for something that can accomidate more airflow!

Experience: 3 Weeks
 Verified Owner
Huge. Lots of room to work with.
Great AirFlow
Dust filters
Fan controller
Visually appealing
Cable management
Very heavy. But who cares?
Some of the plastic parts seem a little weak.
Should have better water cooling support.
No option from CM for a window.
Very nice looking case with lots of room and great cable management.
Lots of room for fans, has good airflow.
The built-in fan controller is a nice addition.
Only using for the last 2 weeks or so but I don't think dust will be much of a problem. I do have the case off the floor tho.

Some plastic pieces seem to be very weak. Example: Drives I've had in the hotswap bays did not want to come out easily. Adding extra pressure on the release made it flex... more than I was comfortable with. I ended up having to open the case and pry the drive out gently.

I've read many horror stories of cases getting damaged while in shipment, check your cases for damage upon arrival. The box mine was in had quite a bit of damage... but the case was undamaged.

For the price, I feel it should have better water support. Just more room up top for a bigger rad would suffice. You can place rads in many different places tho.
A better fan controller would be nice, but the one included is not bad. BTW, My case came with the updated fan controller.

CM have said they will not produce a window side panel.

Over all a great case, but because of the price and the few cons I will only give 4 stars.

Experience: 25 Days
 Verified Owner
Very nice case. Super big and super sexy looking.
No side panel window option as of yet. And for such a big case there should be more room above the motherboard for larger rads and push pull configurations up top. Also Unit isnt packaged very well. First one i recieved had a dent on the side and the door wouldnt close properly like it got twisted or something. But NCIX took care of it.
Over all satisfied with the case. few things that could have been done better with the lay out but over all a fantastic case.

Experience: 13 Days
 Verified Owner
It's beautiful, gigantic, so much room!
No side window! A lot of plastic
Case arrived with order in 2 days. Very fast! After reading many reviews online and hearing about the fan controller and shipping damage, I am pleased to say mine arrived in pristine condition with the updated controller. I can't help myself, sometimes I find myself just staring at it! Make sure you have enough room, I actually have to have this monster sitting on top my desk as it doesn't fit underneath. Make sure you have a sturdy desk though, or better yet its own pedestal, this is over 50 lbs!

Experience: 2 Months
Huge(planty of room for anything.)
look cool
great airflow
Huge and heavy.
Really disapointed that case like this had no side panel window.
I know that there is a fan controler issue with this case but I got the NZXT controler so had no problem at all.

I heard it is big but when I first got this monster, I was shocked. I had 1200 from antec which is full tower and big enough but when I put cosmos2 and 1200 side by side, man cosmos2 literally dwarfs 1200.
Size is it's pros and also cons. Since it's big, you can throw any hardware you wish to have and still have enough room to work, like managing the cables. But because of its size, it's heavy. Heavier than any other case in the market. case itself weighs about 22kg, which means when fully loaded, it will be over 25kg at least.

One other thing that I want point out is that it doesn't have the window on the side panel.
With it's price, quality and design I was suprised that it didn't have the window(not even in CMstore.)
If you want it, you have to mod it.

other than that I really like this case.

Experience: 20 Days
 Verified Owner
- Looks great
- Cable Management
- Quality Build
- Fan Controller is still rev.1
- Due to massive weight, watch your backs!
So far I've really enjoyed building my new rig in this beast. I knew it was going to be massive, but when you have it in person, and try to place it under your desk, you really see how huge this thing is.

A few little things that confuse me why Cooler Master would choose to do so, but otherwise a great case to work with.

Experience: 3 Months
 Verified Owner
Very big ...lots of space
Awesome space management and mounting options
Space left for the top rad mounted inside
Fan controller
This case is really awesome and you will have plenty of space but ... why CM did not leave enough space for the top Rad ?!? If you want to mount it inside you'll have to choose slim Rads (like the Swiftech ones) and if you want to go with a 360 Rad you will have two options :
1/ You condemn the top 3.5" tray ... quite disappointing as there is only 3 trays for such a big case
2/ You drill new holes to mount the Rad a bit further back ... Be aware !! with this option you'll have to put the fittings ports to the rear and you'll have to check if the motherboard ports don't interfere with your fittings choice.
For instance with the Asus M5F you will not be able to mount the mPCiE combo card.

You can suffer from malfunctioning front panel controls. It's a known issue for the Cosmos II and there is a new front panel assembly available if you ask to CM. But before check what's your problem. I had issues with the Power-Reset and Led buttons but not all the time. One day all the buttons were down !! After dismantling the Top panel and I discovered the problem ... The link between the buttons and the PCB of the controller is made by a flexible bridge (same type seen in laptops for the keyboard) and CM thought it does not need to be locked. So if you have erratic controls you can try to glue this bridge in place to see if it's correcting your problem.

Sorry for the long summary but these two points are really important before purchasing this case.

Experience: 1 Days
 Verified Owner
It's freaking big. Like...huge.
PLENTY of space to work.
Black, black and MOAR BLACK.
Looks amazing.
Great cable management.
When I yell "hello" inside, it only echo's a little bit.
I can't really say it enough about this monstrosity of a case. It really is a mammoth. Arrived without a scratch, and it was a work out getting it out of the box. Love the hot swaps and the space to work. Epic win of a case.

 NCIX Forum Messages

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Messages about Cooler Master Cosmos II XL-ATX Ultra Tower Case Black 3X5.25 13X3.5INT No PS Front USB & Sound

2nd revision available? (ttfhm4- Oct 20, 12, 3 Replies) Read this message
DAMN! Just when I though I'd found a nearly p (RVirtue- Jun 01, 12, 8 Replies) Read this message
Good Investment? (MoZ- Feb 08, 12, 10 Replies) Read this message
MCR320 compatibility? (Jolyne_W- Jan 22, 12, 1 Replies) Read this message
The motherload... (Mike_Rogers- Jan 21, 12, 8 Replies) Read this message

Post a New Message  |    All Messages       Browse NCIX Forums

Forum messages are not reviewed and may not contain accurate information about a product. Message contents are opinions from customers based on their own experience with a product. We do not recommend you make puchasing decisions based on Forum messages.
Reviews from the Web

Below are reviews found on other web sites for this product submitted by customers.

Comment: Informative, loads of close up pictures
Posted by: Vinh_N @01/03/13
Posted by: TheBigTroll @08/30/12
Comment: So at the end of the day, was Cooler Master's offering able to live up to the tremendous hype surrounding this Ultra Tower? Absolutely.
Posted by: Babaghan @05/30/12
Comment: Tom Logan - Review
Posted by: RVirtue @05/27/12
Comment: If you are looking for an extra-large computer chassis with every feature you could ever want then the Cosmos II it is.
Posted by: BernardP @03/26/12
Submit a review link   |   Latest 30 reviews
Product Warranty
NCIX provides limited warranty for this product for 30 days after purchase.

Support For USA, Canada, & Mexico 
Cooler Master USA, Inc.
Unit A - 1951 S Parco Ave.
Ontario, CA

Phone: 1-909-673-9880
Fax:  1-909-673-9882 or 9883

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While uses all reasonable efforts to include accurate and up-to-date information on the Site, makes no warranties or representations as to the Site's accuracy. assumes no liability or responsibility for any errors or omissions in the content on the Site. warrants product(s) to be in good working condition and free from defects in material and workmanship for a period of one (1) year for OEM packages, and for thirty (30) days for RETAIL packages, from the original Invoice date unless otherwise restricted below or by the manufacturer's own warranty policy. Defective returns and warranty service will be replaced, exchanged or repaired at's sole discretion, and based on vendor's policy.

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Defective software, video games or DVDs will be replaced by the SAME title and format ONLY (and subject to current availability) within 30 days of the Invoice date. Software, video games and DVDs may be returned within 30 days only if the item is UNOPENED (with shrink wrap still intact) at the sole discretion of does NOT apply a surcharge to credit card orders. Please read our RMA & warranty policy and terms & conditions for more information. If you have any questions regarding our sales and warranty policies, please send us a message -- we'll be glad to answer any of your questions.

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