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COOLER MASTER HAF series RC-902XB-KKN2 Black Steel, Polymer, Mesh front bezel ATX Desktop Computer Case Standard ATX PS2 Power Supply

Ships from United States. Most customers receive within 3-10 days.

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  • Steel body, Front Mesh, Plastic bezel ATX Desktop
  • 2 x USB 3.0 (internal), 1 x Audio In & Out (supports HD Audio) Front Ports
  • 2 External 5.25" Drive Bays

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

The Cooler Master HAF XB EVO offers a perfect blend of design, performance and function in a unique cube design that stands out immediately. It comes in a dual-layer design to accommodate your high-performance components in an ultra compact footprint. You can cram an ATX motherboard, VGA card up to 334mm in length, and CPU cooler up to 180mm in height, and mix and match multiple ODD, HDD, and SSD to meet your storage needs. All the components are efficiently and effectively cooled thanks to the superb thermal solution, which already includes two pre-installed fans, meshed panels and can be upgraded in future with extra fans and water cooling. The motherboard tray can be removed for easy installation and debugging. And with the recessed handles, you can easily transport your gaming rig to a LAN party and show off your gaming prowess.

General information

Removable Motherboard Tray

With the removable motherboard tray, you can easily transform the case into a test bench – ideal for enthusiasts and overclockers.

General information

Flexible HDD/SSD Support

In addition to two 5.25" drive bays, this case supports up to four 3.5"/2.5" drives via the front bays. The HDD cages are also removable for enhanced convenience and flexibility.

General information

X-dock Bays

Of the four HDD bays, there are two X-dock bays that allow easy access to your 3.5"/2.5" drives.

Upgradable Cooling Solution

General information

Air cooling system
  • Top: 200mm fan x 1 (optional)
  • Front: 120mm XtraFlo fan x 2 (installed; 1200 RPM, 17 dBA), or 140mm fan x 2 (optional)
  • Rear: 120mm fan x 1 or 80mm fan x 2 (optional)
Liquid Cooling system
  • Front: 240mm radiator x 1 (optional)
  • Rear: 120mm radiator x 1 (optional)
General information

Easy Maintenance

Dust filters helps prevent dust buildup that may compromise cooling or even cause damage to your components. And the filters can slide out easily, making cleanup a breeze.

General information

Easy Front I/O Panel

Two USB 3.0 ports and two audio ports located on front panel allow for easy connection to peripherals.


Learn more about the Cooler Master RC-902XB-KKN2

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details
Ownership: more than 1 year
Verified Owner
5/ 5
Love it!

Pros: Airflow is great
Plenty of space

Cons: Challenging fitting on a desk with multiple monitors.

Did you find this review helpful?
Ownership: more than 1 year
Verified Owner
4/ 5
To basic and simple

Pros: cool hot swappable hd trays
great for someone who is learning about computers

Cons: Mine came with a warped motherboard mount tray that was unacceptable and needed to be an rma.
Not enough fan / radiator mounts the sides are just wasted space.
Good luck mounting some hard drives in the hard drive slots with a full sized power supply installed
It takes up so much space yet it's so cramped.
I'm tired of looking at it.

0 out of 1 people found this review helpful. Did you?
Ownership: more than 1 year
Verified Owner
3/ 5

Pros: Lots of air flow.

Cons: The hot swap board. I was trying to copy data from one of my old drives to a fresh drive with nothing on it. Transfers were slow-horrible to say the least. Disk activity was 100% without anything touching it at all. Removed the hot swap board from the equation and speeds/activity returned to normal specs before the upgrade. Hard to install new items into.

Other Thoughts: Remove the hot swap board. It will save you from insanity.

0 out of 1 people found this review helpful. Did you?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Not For Everyone but Me Likes It...

Pros: - Despite its relatively compact size, there's some elbow room to work with in there.
- Two-compartment design (upper/lower) with the lower section housing the PSU, hard drives, optical drives; upper section holds the mobo (horizontal placement), graphics card, and CPU cooler; good for organization.
- Removable motherboard tray is handy if you're going to be accessing the box a lot.
- Both side, as well as the top, panels are completely removable (by two thumbscrews each) which aids access; front panel pops off by tab management.
- Mobo tray easily removable by managing four thumbscrews.
- Dual, side-by-side fan setup at front panel (the only fans included with this case and come pre-installed as intakes).
- Fan options: 1 x 200mm fan placement at top, 2 x 120mm fans at front, 1 x 120mm at left-rear, 2 x 80mm at bottom-right for lower compartment.
- Side handles are, well, handy for moving the box about; bought this as a portable Overwatch LAN box for the wife.
- Rubberized feet give great traction and good clearance below the machine.
- Fits a Coolermaster Silent Gold 1000w PSU length without issue.
- Fits an EVGA 1070ti card with room to spare.
- I find the pre-installed 120mm fans at front to be pretty quiet and offer good airflow.

Cons: - In person this box is a lot bigger than the pictures would have you believe - it's essentially a flattened mid-tower.
- Thumbscrews arrived SUPER tight; needed screwdriver to loosen them.
- Power/HDD buttons in front panel might not work well for those with floor placement setups.
- Accessing lower compartment for even any amount of fine-tuning requires complete/near-complete removable of mobo tray.
- Air-cooled CPUs beware - you cannot fit a 200mm fan at the top panel with a large/tall heatsink installed; my older Xigmatek CPU cooler is just too tall to also allow use of the top fan so I will end up ordering an AIO water cooler for the front panel to accomplish this.
- Top fan can only be 200mm in size (pre-drilled holes though they are rubberized for sound reduction).
- AIO watercoolers can only be installed at front (though this replaces the pre-installed 2 x 120mm fans).
- The mesh-makeup of this case means you will hear components (like fans moving air) in there - a negative of the HAF series but you know that going in.
- The twin optical drive space at front lower-left is essentially wasted if you dont run a DVD burner there; but the locking/unlocking mechanism for these are well done (I had an optical drive installed briefly for application installs, now it just sites empty).

Other Thoughts: - Power/HDD lights are red and only red.
- The case does get heavy when all the components are in place, but this is where the side handles will help you.
- The size and shape wont be for everyone but this is a sound case for building. I have an AIR 540 "cube case" and prefer that one more but this was my runner-up in deciding on my Summer 2018 build. I do hope that cube/multi-compartment cases are the way of the future for case manufacturers - the tower designs have grown stale and repetitive in their offerings.

4 out of 4 people found this review helpful. Did you?
5/ 5
I have 3 of these, only because everybody's out of stock now...otherwise I'd have 5!

Pros: Very modular, easy motherboard mounting, lots of hidden space to run cables, 4 drive bays, very good airflow. 2 fan radiator works perfectly in the front.

Cons: Too much mesh on the top. Set up for a 200mm fan, would rather see mounting holes for several smaller fans. Height of legs really too short to gain usable airflow under bottom of unit, where it's coolest. These are splitting hairs because this is a great product!

Other Thoughts: I build high end customs for a living, and these are proof you don't need full towers! Super easy to work with, just wish I could still find them.

2 out of 2 people found this review helpful. Did you?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
It's huge, but has great air flow

Pros: Purchased two of these for a father/son build.

Excellent air flow. The two fans it came with are pretty quiet. Used them in a push/pull set up with a CORSAIR Hydro Series H105 Extreme Performance 240mm Liquid CPU Cooler and a 8700K processor, these and another 120 mm fan I had lying around keep the processor under 60C under my load tests so far.

Cons: The power switch button is a little oversized compared to switch beneath it, but that's nothing. The only thing I didn't like the 8 screws to hold in the front 3.5" tray. If use the 5.25" slots for a CD/DVD drive, and want to screw it down on the one side, you have to remove the 3.5" to get to it. Pretty minor and not worth taking an egg, but it's kind of a pain.

Other Thoughts: It's a BIG case, so if space is an issue, find something else. Great quality though.

3 out of 3 people found this review helpful. Did you?
Ownership: 1 month to 1 year
Verified Owner
5/ 5
Cooler Master HAF XB EVO

Pros: Sturdy construction, total volume is between a full tower and a mid tower - about 10% more than my very roomy mid-tower case, can sit up on the desk instead of down on the floor, has handles for carrying it to my work bench, not too heavy to carry, motherboard tray, front accessible "X-Dock" bays with removable "X-Dock" trays, screw-less bays for optical drives, places for fans and/or water coolers, lots of head-room for big CPU cooler fans, easily removable sides and top with thumb screws,
screens or grills allow free motion of air as well as observation of condition/error codes and colored lights, front panel audio and USB3.0 connectors. Quiet as far as motor or electronic sounds.
Motherboard temperature points range from 30C to 40C. CPU stays close to 33C. Video card about 34C.

Cons: The Power Supply, the disk drives and most of the cables are under the motherboard tray. Accessing
them may require removing the motherboard tray, which can be a hassle if you have to unplug all the
cables from the motherboard. 2.5 inch SSD has to be attached to the tray with screws. Plug in power supply cables
before you install the power supply. Can hear air blowing, but it's not bothersome.

Other Thoughts: This is the best case I have ever owned. I recommend it to all desktop users!
It would be really convenient if the various thumb screws could stay attached to their respective panels or housings when unscrewed; some of your compeditors have that.

2 out of 2 people found this review helpful. Did you?
Ownership: more than 1 year
Verified Owner
5/ 5
BEST CASE EVER !!!

Pros: The design is very well thought out
- Great air circulation
- Lots of room for components even a double rad liquid cooling system.
- Looks even better with RBG fans installed.
In fact I'm going to reuse this case in my next build. See... It even promotes recycling. lol

Cons: Absolutly NO cons in my experience.

1 out of 1 people found this review helpful. Did you?
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