CM Stacker Case Review

A hefty case, well made – Greg Zenger

From the moment I first saw the Cooler Master CM Stacker pictured in a magazine, I have been impressed with its appearance. I would like to thank the kind people at CoolerMaster USA, Inc., for letting me experience all this case has to offer.



At first glance this case appears massive with its 11 drive bays, yet sleek with its two-tone silver and black finish. Designed to be a home-server case, its skeleton is heavy and rigid constructed from steel, while its exoskeleton is beautiful brushed aluminum. The black drive bay covers are a steel mesh allowing air to enter the case.


The rounded sections at the top of the case as well as the front control panel are constructed from plastic and compliment the appearance nicely. The overall dimensions of the stacker are 9 x 23 x 22.5 (W x D x H in inches) the optional casters add approximately 1.75 inches to the overall height. This case, while not much taller or wider than other popular cases, is a good 5 inches deeper, giving it the necessary space to be a home server case.



Its large size and weight will not make it popular among the LAN Party crowd; however less mobile computers, such as servers, will truly benefit from the additional space. If you have room under your desk, I highly recommend installing the casters as they make moving the case much easier.


Those interested in water-cooling should give this case serious consideration, as the extra space will easily accommodate reservoirs, pumps, and additional power supplies. Cooler Master’s own Aquagate cooler has a matching external appearance and should easily integrate with this case.

One feature that stands out most is the 12 inch diameter vent located on the side. This mesh covered opening houses an air filter and an 80mm fan located in the center. To clean the filter or install a fan, the mesh must be removed from aluminum siding with 6 hex bolts. It is possible to remove the filter without removing the mesh; however this heightens the potential of tearing it.




For those of you who do not like the appearance of the mesh cover, Cooler Master sells separately a side with a pre installed window, or those of you who like to get their hands a little dirty could easily mod the opening into a circular window.

On the other side of the case is the intake for the optional Cross Flow Fan, an innovation of Cooler Master to provide superior motherboard, RAM and PCI, cooling. This fan is most suited for upcoming motherboards with the BTX layout. This fan was not included with the case, so I will be unable to comment on its performance.


When looking at the back of the case two things are immediately noticeable: the 120mm fan, and a location for power supplies at both the top and bottom. If only one PSU is desired, two 80mm fans can be mounted in the second PSU bay. I was disappointed in the mounting bracket as it could only be affixed to the case with 2 screws. This is not a problem for low RPM fans, however faster fans may cause vibrations to carry through the case.



The only fans included with the case are 2 x 120mm (rear and HDD) and 1 x 80mm (top). All three of these fans are low RPM and are virtually silent. However, if you desire superior airflow, you may wish to replace these fans with some that have a little more push. The exhaust fan has a mesh grill over it that can easily be removed. I found the grill a little too restrictive for my fan (I upgraded to a higher performance fan); however, with the stock fan it was not a problem.

I found the black mesh faceplates very difficult to remove. The easiest way to remove them is to insert a screwdriver between the faceplate and the aluminum side and gently pry outward. The faceplates are very sturdy, constructed from thick plastic and steel mesh, each housing a filter.

Optical drive installation is simple, just mount the plastic drive rails to the corresponding side of the drive and slide it into place. To remove the drive, unlatch the plastic tabs on each side and the drive will slide out. If you do not wish to use the mounting rails, drives can still be secured in the old way with the 4 screw holes located on each side of the drive.


To install a 3.5″ floppy drive, the 4-in-3 Device Module must be used. The CM Stacker has enough room for 3 of these modules (only 1 is included, each takes up 3 5.25″ drive bays) leaving room for 2 optical drives. The 4-in-3 Device module houses 4x 3.5″ hard drives and has a 120mm fan to keep the drives cool. If the module must be used to hold a floppy drive, an 80m fan can still be mounted to cool the 3 drives below. Hidden beneath the large, yet silent 120mm fan, lies a large grid of circular holes. I found these to be more restrictive then necessary and elected to remove them.









Keep in mind that one of the sections contains 2 of the mounting holes for the 80mm fan, so you may want to keep that section intact. To minimize vibrations created by hard drives and fans, the module is supported by 8 rubber grommets. With three of these modules installed, the case can comfortably hold 12 hard drives.

I myself only have 4 hard drives and decided to space them out more by installing them in their own 5.25″ bay with some adapters I had lying around. While the 4-in-3 module is nice, I decided to make use of the space and spread the drives out. Unfortunately without the 4-in-3 module there is no way of mounting any front intake fans. I was able to secure two 120mm fans into place with zip ties, however I would have liked to see an alternative way of mounting fans at the front of the case.

The front panel houses the Power and Reset buttons as well as hard drive activity and power LEDs. The LEDs are a Blue and are the true blue variety (~430nm) – not the aqua-blue (~470nm) often found on cheaper cases. The LEDs are very bright; bright enough to illuminate my wall in a dark room (a trait common to cases with blue LEDs). Other connectors on the front panel include an IEEE 1394 (firewire) port, headphone and microphone jacks, and 6 USB 2.0/1.1 ports.

The microphone and headphone jacks connected easily to the internal headers on my motherboard (Abit NF7-S) and allow me to connect my headset for gaming. Unfortunately, my motherboard only has 4 internal USB ports, and thus I was only able to attach 3 of the 6 USB ports. My 4th internal port is used by my flashcard/floppy drive combo. Cables not being used can be detached from the inside of the unit. It would be nice to see a case that has an integrated USB hub, thus requiring only one USB header.



I went ahead and converted the case to BTX, which was simple enough, yet did require some time and help from the manual. What is most interesting about the case is that everything is reversible. Because BTX calls for cases to open on the right hand side, the motherboard tray can be easily installed on either side and the side panels can be reversed.



Motherboard installation was a breeze, especially for an ATX board. Even an E-ATX mobo would fit comfortably. I installed an additional power supply I had to power my fans. It’s not really necessary; however, a server running 12 hard drives may benefit from the extra juice. And hey, 600 Watt power supplies are expensive – two 300 Watt power supplies are not. An adapter cable is included with the case to enable you to connect both power supplies to the system.


This is done by connecting the Green wires on each power supply and the ground wires on each power supply. One problem I see with this, however, is that the adapter is ATX form factor. The BTX motherboard power connecter has 4 additional pins, meaning the adapter will not work with BTX power supplies. Perhaps Cooler Master will make a BTX adapter as well.



Overall, I am very impressed with this case. Like most cases it has its faults; however it has a huge list of extra features. With BTX just around the corner, you can feel safe investing money on a nice case and not have to worry about the BTX motherboard you will be buying in the future.


  • Lots of space for server applications or water-cooling
  • Future proof: BTX conversion
  • Excellent airflow
  • Fans included are quiet


  • Large side vent will not contain the noise of louder CPU fans
  • No way to mount floppy drive without hard drive adapter
  • Large and heavy
  • Aluminum scratches easily
  • Fans included are low CFM

Greg Zenger

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Avatar of Mr.Guvernment


14,866 messages 0 likes


well i own a cm stacker:)

the one argument - it is too heavy - what do you expect for a server / high end workstation case! build it in all aluminum and watch it collapose because of it's sheer size!

no one seems to mention the thing does have wheels you can place on the bottom - also - how often does one plan to lift up their case and move it - with this case i have dual 400w Fortrons in it 2 hard drives / cdrom and i can lift it easily - i know most geeks are not overly strong but it is not as heavy as they make it out to be (then again i am 6'4 and 220lbs :D)

as for the removal of the front intakes - yes they can be hard - but once you do it once - it is easier everytime and once you get one out it is easy. The panels are a tight fit and i like that instead of loose flimsy things they fit snug, so it takes a little extra push to snap the teeth out to slide them out. And again - how often are people putting in floppy / cdrom drives? for how in-frequent most people do this also should not be an CON issue.

As for the side intake - it is not ment to dampent noise - it is meant to provide air flow so you dont need a fast loud CPU cooler - a loud CPU cooler will be heard in any case so to me that is a lame con point. I got a thermaltake volcano in my case - i also got the dampening material and put it in the case and my other computer with no side panel intake is louder!!!! then my stacker! that was before i put the dampening material on the side panel!!!!

As for the panel - the side panel's are smooth and are not shiney - news flash - All aluminum scratches easily - the side panel's do seem to be more of a "soft" burshed aluminum alloy but i am rought with my cases and thus far mine has no marks and because it is not a smooth shiney surface - it would be harder to see any scracthes you may give it.

My biggest Con - they are offering the side panel with a window and the mobo cooler but they are not out yet so now if i want the windowed side panel - i got to buy it and have an extra side panel lying around - to me that is the only CON about this case i can see.

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Avatar of JTanczos


1,155 messages 0 likes

I don't much care for the aluminum either, I'm holding out for them to release the one with the black side panels, which was shown on most online vendors pre-release... then the stackers started showing up with aluminum sides :(
If you would buy a black stacker, Let Coolermaster know!

I have the CM Stacker. The fact it came silver annoyed me. Its not smooth and has a textured look to it. I wrote over at the forum to ask what the deal was. They said it was a prototype. Grrr. If its a prototype they shouldn't have posted that pic on the webpage AND on the box as THAT model. Esp when they don't even offer the black one.

The faceplate bezels are incredibly difficult to remove. To the point its painful. I figure once I get a few 4 in 3 modules in they will be near impossible to remove. I scratched up the inside of the case alittle and hurt my fingers trying to get those out. I am thinking about removing the quick connect snaps on the sides. It would APPEAR that there are slots that you could push in with a flat screwdriver to remove the bezel but are inaccessible when those snaps are on. They have to be removed when the case is empty if you are thinking of doing the same thing.

I didn't try out any of the fans yet. I didn't know they were just low cfms. I will get a few Sanyos to replace em. Its going to be a server PC anyway away from sleeping areas so noise isn't too much an issue.

Weight isn't an issue for me. I don't pick up my case often enough to worry about it. Once or twice a year if that. I think the weight said it was only around 40 pounds.


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