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Cooler Master COSMOS SE Review


Cooler Master COSMOS SE Closer Look: Working Components:

One look inside the COSMOS SE and you see a lot of space. And a lot of hard drive trays. In fact, you can mount eight hard drives or up to 18 solid state drives if you have a need for major storage. Motherboard support includes ATX, microATX, and Mini-ITX. There is a nice cut out in the motherboard tray that provides easy access for your CPU cooler installation and a hefty 34mm of space for cable management behind the motherboard tray. The craftsmanship and construction quality are evident inside this case. All the corners are rounded smooth. All the chassis panels line up and flawlessly fit together.

There are four included fans: two 120mm (blue LED) fans up front, one 140mm fan at the top, and one 120mm at the rear. All the fans are 3-pin and come with Molex adapters that are easy to remove. The view from the back shows the four rubber grommeted cable routing holes. There is a place at the top and bottom of the hard drive cage frame to mount an SSD. If you are a fan of liquid cooling, you have a few options. There is space for the standard 120mm rear radiator, up top you can go up to a 280mm radiator, and up front you can go with up to a 360mm radiator.

Again I have to say how much I like the handles. They sort of ruin it for cases without handles now. And the lower supports carry the handle theme at the bottom. There are four rubber isolators mounted to the bottom of the supports to keep your case from scratching or sliding around on the floor. 













Behind the front fascia you can see the two 120mm blue LED fans. There are two brackets included that are for mounting a radiator up front. There is enough room for a 360mm radiator and three fans. At the bottom there is a hard drive cage and you can access two hard drives and two SSDs from the front. This cage can be removed if you like. It is secured from the bottom of the case by four screws.

There are three optical drive covers, but only the top two bays are functional. The bottom "bay" allows access to the top of the upper front fan. The optical drive covers are easily removable from the front by pulling on the locking tab. This is a nice feature. One thing I find a little odd is that these covers are so easily removable, yet the optical drive bays are not tool-free. The optical drives are retained with screws.





One screw holds the top cover on. Take the cover off and you can see there is the one 140mm fan (included) and room for one more. Or you can go with two 120mm fans. You can also mount the fans on top and up to a 280mm radiator below. And if you mount the fans on top, Cooler Master made sure to have a hole to fish the fan connectors into the case.


The drive cage is made up of three zones, and each zone holds two hard drive trays and has a left and right section. With the sections in place, you can mount two 120mm fans to help cool your hard drives. But if you use a long video card or a front radiator, you will need to remove some (or all) of the sections. For my build, I removed the middle and bottom sections so I could get the GPU in there. The bottom two hard drive trays in the lower cage can remain. This also allows more space for the USB 3.0 cable to motherboard connection and the SATA cables coming off the motherboard.

Looking up you can see the top 140mm fan and the rear 120mm fan.  There is space at the top for two fans. Also at the upper left there is a generous hole for the CPU power cables. There is enough space above the motherboard so you can get the CPU power cable plugs through the access hole even after the motherboard is set in place. 




Here is what the hard drive trays look like. These are not your average flimsy hard drive trays. On the left is a tray in the normal poisition. To install a standard hard drive, there is a little tab underneath you push that allows you to pull the tray apart about a quarter of an inch. You then place your hard drive inside, align the pins with the holes in the side of the hard drive, and snap it shut. Your hard drive is now secured to the tray.




And you do the same thing for your SSD, except it mounts to the bottom side of the tray. You can have both drives attached to the same tray. There are also screw holes so each drive can be even more securly held in position.


This is one of the modular sections shown above. These make up the mounts for your hard drive trays. There are six of these - three on each side. You will likely have to remove these if you use a discrete video card. There are four screws that hold each section in. And if you use a front radiator, then these sections will also have to be removed. But you still have at least two hard drive trays at the bottom cage.

The hardware is standard and includes zip ties, a speaker, security lock buckle, miscellaneous motherboard stand offs, and mounting screws. Also there are two brackets for mounting a radiator to the front of the case. The instruction manual is thorough and easy to follow. The graphics and illustrations are well designed and easy to understand.



Here we have the final assembly. Lots of space for a nice clean build and great cable management; the build could not have gone any smoother. On the right you can see all the LEDs in action. The front fan LEDs can be turned off. I really like the hard drive activity light, which is a narrow horizontal bar just above the top optical drive. Most cases have a small LED tucked away and they are hard to see unless you are on top of them. But Cooler Master did a nice job on this one - you can see it from any angle. Normally it has a steady blue glow until there is some HDD activitiy, then the blue intensifies. On top there are two blue trim sections that accent the top buttons. These are on whenever your system is powered up. It would be nice to have a switch to turn these off (like the fan LEDs) as they are rather bright, especially if you are in a dark room.     


  1. Cooler Master COSMOS SE Introduction & Closer Look
  2. Cooler Master COSMOS SE Closer Look: The Case
  3. Cooler Master COSMOS SE Closer Look: Working Components
  4. Cooler Master COSMOS SE Specifications & Features
  5. Cooler Master COSMOS SE Testing: Setup & Results
  6. Cooler Master COSMOS SE Conclusion
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