Cooler Master Cosmos SE Review

Baby Cosmos Reviewed

Cooler Master Cosmos SE Review


Cooler Master are back with a new Cosmos case, this time though rather than the elite pricing that came with the Cosmos 2 the SE comes in at a much more reasonable £140. The specification list below certainly reads well although no mention of watercooling support in that list, so let's move on to a video so we can answer all these questions and many more in a full fat TTL length case review.


COS-5000-KWN1 (windowed)
Available ColorMidnight Black
MaterialPolymer, steel, aluminum, mesh front bezel, rubber
Dimension (W / H / D)263.8 x 569.4 x 524.4 mm
Weight10.8 kg
M/B TypeATX, microATX, Mini-ITX
5.25" Drive Bay3 (exposed)
3.5" Drive Bay8 (hidden)
2.5" SATA HDD Drive Bay18 (hidden; 16 converted from 3.5" bays)
I/O PanelUSB 3.0 x 2, USB 2.0 x 2, Audio In & Out
Expansion Slots7+2
Cooling SystemTop: 120/140mm fan x 2 (one 140mm black fan installed, 1200 RPM, 19 dBA)
Front: 120mm blue LED fan x 2 (installed; with LED on/off), or 140mm fan x 1 (optional)
Rear: 120mm fan x 1 (installed, 1200 RPM, 17 dBA)
Side: 120/140mm fan x 1 (optional)
HDD cage: 120mm fan x 2 (optional)
Power SupplyStandard ATX PS2
Maximum CompatibilityVGA card length:
with HDD bracket: 276mm / 10.9 inch
without HDD bracket: 395mm / 15.5 inch
CPU cooler height: 175mm / 6.9 inch



So lets start with the positives. It looks more expensive than it really is with those trade mark bars for the feet and handles at a quick glance you wouldn't be blamed for thinking it was the Cosmos 2. The large side windows and the blue LED stripes around the buttons and front of the case just add to that. The build quality is awesome, verging on bomb proof where the steel is concerned, the plastic feels tough and durable and the mesh areas just seem to help your eyes enjoy the case that little bit more while providing the ventilation needed without looking cheap or out of place.

The thing is the SE is much smaller than the Cosmos 2. MUCH smaller but so is the price. It's even smaller than the Storm Trooper. So as with everything when you make a case smaller you end up with less room inside and you sure do notice that with the SE to the point that with the HDD bays installed it feels cramped. You can remove those bays to help open it'll up to fit longer graphics cards and even a water cooling radiator in the front if you wish.

Something very strange is one of the front fans is actually about 30% covered by the lower optical bay cover, we understand you can use that area for an optical bay sized device but having a fan partially hidden just sends our OCD senses crazy, we personally think that those two fans no matter how needed to be moved down or that 3rd optical bay just got rid off. It may be a picky thing but it just doesn't look or feel right.

The Cosmos SE is a good case but we cant help but feel that you are paying for form over function. The Trooper is cheaper, bigger and much easier to build a rig in and there are many other cases out there that cost less and deliver more - the difference being none of them look this pretty really. I think the main point we are trying to make is if you love the Cosmos design and cant afford a Cosmos 2 then the SE will be perfect for you, its just you will have to live with a few compromises to have that chunk of sexy on your desk.

It's by no means a bad case, and it does look the dogs danglies plus if you are handy with the tools there are a lot of possibilities for making this case your own. Sadly though we can't give it a gold award just because it looks the like a Cosmos but is much cheaper, it does still feel small and for the price doesn't quite deliver what we would call an OC3D Gold award worthy case, it does however get a very shiny silver.


Thanks to Cooler Master for sending the C-SE in for us to review, you can discuss your thoughts in the OC3D Forums.

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Most Recent Comments

03-12-2013, 16:01:25


We take a look at Cooler Masters latest Cosmos the SE. At £140 this is much more affordable than full fat Cosmos 2 so is this a bargain or a cut too far?

Continue ReadingQuote

03-12-2013, 17:13:17

Heh, Still tempted by the case. I love the Cosmos look and while I'd love the full sized one I don't have the space and I occasionally go to LAN parties. Kinda glad I didn't get the 7990 now...Quote

03-12-2013, 18:10:59

Have it myself and i think its more than worth the money your paying for,i paid 140€ for it, i think that would be like £110-120. Fair deal imo Quote

03-12-2013, 19:04:17

I love those nifty HDD mounting trays which just snap it into place and can also take two SSDs, it really is the little things that make big differences

It's a shame about the funny placement of the front two fans thoughQuote

05-12-2013, 03:25:27

That drive cage is a really good idea, having two on one slot. Also a good idea having the retractable side to install a normal HDD. on that idea.

It's a nice'ish case but it just doesn't look the same quality of the Cosmos 2, but obviously that costs a lot lot more, and with that you need a lot of space to seat it.Quote

08-12-2013, 07:57:33

Next case for me Quote

09-12-2013, 07:50:51

I'd be more tempted to go for the Cosmos 2, it looks gorgeous but this just looks to me personally basic and plastic. I'd like to see what Tom could do with it though, and yeah give him a white one!Quote

09-12-2013, 08:27:21

Ive currently got the Cosmos S. Nice case but shame about the silver and the dodgy cable holes. Ive been holding of Cosmos 2 for a while just purely because of the price. Recently seen the Cosmos 2 in person at Scan. Big??? Wow. I did see this in a display box but couldnt see inside. I was abit dissapointed in the insides. Looks like im gonna be getting a Cosmos 2. I did like the looks of Phantom 820 until Tom said its not as good as the Switch 810 but i dont like that.Quote

09-12-2013, 08:34:22

Cosmos 2 is huge, never seen it in person but I had the Cosmos and even if you just get the tape measure out you can see it'll be a monster, but £300 is to much.Quote

09-12-2013, 08:49:15

If only they had some sort of cover over the drivebays on the SE, like the one on the full size Cosmos 2. Completely spoils the look of the case and makes it look cheap having the drivebays look like that in my opinion. Other than that it looks good, just wish they had given room for a full size rad in the roof.Quote

09-12-2013, 08:59:32

SE = Small Edition?? (havent actually done research on the name here)Quote

09-12-2013, 09:04:59

Originally Posted by Topham View Post
SE = Small Edition?? (havent actually done research on the name here)
Possibly, or standard edition?Quote

09-12-2013, 09:18:52

i thought this case was gonna be bigger than the cosmos 2 !! lolQuote

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