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Item#: N82E16811139011

Corsair Carbide Series 300R Black Steel / Plastic ATX Mid Tower Computer Case

  • Steel / Plastic ATX Mid Tower
  • 4 x 3.5" or 2.5" Internal drive bays
  • 3 External 5.25" Drive Bays
  • 4 x 3.5" or 2.5" drive bays Internal 3.5" Drive Bays
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
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Learn more about the Corsair 300R

Quick Info


  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years

Customer Reviews of the Corsair 300R

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  • David L.
  • 12/7/2014 2:48:06 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year

1 out of 5 eggsStay away from this

Pros: Well ventilated

Cons: Corsair …. Run fast away from this stuff unless you are buying Corsair memory. I believe they never road test their hardware. Nothing fits together, the H110 CPU Cooler is too long and hits the HD bays, the H105 CPU Cooler is to thick and hits the top of the video card. Neither cooler can be mounted inside on the top because the fans hit motherboard heatsinks at the top of most upper lever motherboards like the GIGABYTE GA-Z97X-UD5H I got from New Egg at a great price. Another reviewer made a true statement; the only place to mount a better cooler is externally where children and pets could be endangered of being hurt. In the back room at Corsair the left hand doesn’t know right hand is doing. I believe if you are going to buy this case you need to add a good dremel tool with extra cutting bit to your order. Think about that, this company produces this case and its understudy that won’t accommodate the better Liquid Cooling units without cutting and chopping up the cases. Think about how many headaches and RMA’s could be avoided if Corsair did a few minutes of road testing.

Other Thoughts: If you take this case home take out your dremel tool.

0 out of 1 people found this review helpful. Did you? Yes No

  • Drew B.
  • 11/8/2014 7:40:31 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsStylish an inexpensive

Pros: +Sleek styling
+lots of room for upgrades
+the trays for smaller SSD drives are very nice
+Cable management is.... okay...

Cons: I purchased this case with a thermaltake 2.0 extreme cooler in mind for my cooling device. It would not fit in the case with the motherboard and everything else finally seated in. I had to make some modifications to the case to allow it to fit. Luckily the mesh cover on the top is removable... I took that off, attached the liquid cooler and used some plastic to raise up the mesh from the case itself about a quarter of an inch. I had to use some nice looking tape (oxymoron) to attach it to the case. It looks ghetto rigged if you look closely but it isn't noticeable from a distance.

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  • Trenton G.
  • 11/2/2014 5:10:46 PM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsExpansion Slots Don't Line Up

Pros: - Cheap
- Spacious
- Lots of fan spots
- Decent Quality

Cons: I have two minor problems with this case:

1. The sides of the case have a tendency to warp which makes putting them back on a hassel.

2. The expansion slots don't quite line up with my graphics card. The frame of the slot overlaps with the HDMI port on my card slightly which makes it short out when the HDMI is plugged in.

Unfortunately this has prevented me from being able to connect my TV through my graphics card. I was able to work around it by using my motherboard ports but I can't use graphic intensive programs on my TV.

I only took 2 stars off because it's a pretty decent case but the fact that I can't use my HDMI port has been somewhat limiting. This may be only a problem with my case though.

Other Thoughts: My specs:
XFX 280x Black Edition
Gigabyte GA-z97x-UD3H-BK
Rosewill Capstone 750W-M

0 out of 2 people found this review helpful. Did you? Yes No

  • Jeremy G.
  • 10/26/2014 8:04:37 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsVery good for the price--just a couple issues

Pros: Price is right.
USB3 ports on the front.
Includes higher-end features without the high price.
Plenty of space for any graphics card you could want.
Sides are interchangeable, so if you don't want the fan holes, you can swap sides. I think Corsair also sells the sides separately, so you can buy a solid side and get rid of the holes completely, for a price.
A Cooler Master Hyper 212 Evo cooler does fit.

Cons: Just a little too small in some areas.
Tool-less 5.25" bays more trouble than they're worth.
Included fans are too loud.

Other Thoughts: This case had all the features I wanted, and is reasonably priced. I'm very happy with it, but there are a few areas I'd like to see improved that likely wouldn't add much (if anything) to the price.

1. Add a little more space behind the motherboard. It's cramped to run cables back there. Once you get the ATX power cable for the motherboard back there, you will have to be careful about where you route any other cables to ensure you can still close the back panel. I've had to leave some cables inside the case because I couldn't route them properly and still close the back.

2. The included case fans are too loud. If you're going for a quiet build, you'll need to plan to replace them. I'd rather they weren't included at all and the price were reduced by $5 or so. But, I suppose some people would try to use the case entirely without fans if they did that.

3. I still use 5.25" drives. I've got two optical drives just in case I need to burn a DVD or want to watch a Blu-ray (the Blu-ray drive isn't a burner). These work fairly well with the tool-less system. The problem is with something that isn't full length. I have a Rosewill card reader/USB3/USB2/eSATA device that uses a 5.25" bay but is only a few inches deep. I had to pry off the little tool-less lever and use screws, and to be honest, I'd feel better if the optical drives were put in with screws too. I don't understand case manufacturers' obsession with tool-less bays. What's wrong with screws?

4. The case could stand to be an inch or so taller. You will not be able to fit a case fan in the top front position if you have a full length optical drive installed. If it were a little taller, this wouldn't be a problem. As others have noted, a full length radiator also won't fit for the same reason and because it will likely interfere with your RAM on the motherboard. If you are going with a water cooled setup, I suggest a larger case.

5. No filter for the side fans. Really? No filter for the top either, but these should be exhaust fans so I haven't added a filter to the top, just the side.

1 out of 1 people found this review helpful. Did you? Yes No

  • Soren C.
  • 10/16/2014 10:04:42 PM
  • Tech Level: Somewhat Low
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsNice airflow design but worse drive bay design?

Pros: A lot of fan mounting options.

Got a very good air flow optimized impression.

Nice black clean look.

The optical drive looks pretty good once its in place, looks very natural once in place.

Water cooling options which is always nice.

Cons: Rather than a slide in and out you have a cheap plastic clipping that easily gets stuck when putting them back in place.

There's no dedicated SSD mount, you could use the plastic things but that just looks so inelegant.

Not too many zip tie mounting points as I would've hoped for

Would've liked a longer HD audio cable since routing it with the other front panel cables through the same hole proved to be impossible as it wouldn't reach the socket in the motherboard. Had to cut the zip-tie and loop it around near the optical drive bay.

The side panel fans are placed side by side, but depending on the graphics card you won't be able to use one of the panels because they would be right in front of where the PCI-E cable would be coming out of blocking the possibility of placing a fan there.

Last problem isn't a problem with only corsair 300r, but with cases in general. The side panels are a FRICKEN PAIN IN THE POOPER. Please please I hope someday someone makes a case that can deal with this problem cause its oh so frustrating seeing a tiny bulge when I close the side panels every single time only to have to restart the process.

Other Thoughts: OK so I have the 200r as my personal case and loved it, so when I was building a pc for my cousin I decided that since the 200r was such as great case that the 300r would've been even better right?

Kind of, but not really. The case is clearly more optimized to move air around the case with the meshed front and the elevating corners. But the hard drive bay just seems to inconvenient having worked with the 200r. It seemed like a step forward and backwards at the same time.

1 out of 1 people found this review helpful. Did you? Yes No

  • kirk t.
  • 10/14/2014 2:28:55 PM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

2 out of 5 eggsincorrect dimensions listed by manufacturer

Pros: nice case looks and does everything it says, got it on sale and figured that I would get the 300R for the same price as 200R. more space and great reviews.

Cons: size of case listed at 17.7 height is incorrect. That is without the feet i'm guessing. but as far as I can see they don't come off. height is 18.7" and that just won't fit my desk space. Really dissapointed that dimensions are off by an inch

1 out of 1 people found this review helpful. Did you? Yes No

  • Troy N.
  • 10/1/2014 7:52:53 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month

3 out of 5 eggsSmart Interior, Flimsy Panels

Pros: -Interior is smartly designed and easy to work with; basically everything you've heard about Corsair cases.
-Plenty of locations for fans
-Nice minimalist design
-Front panel ports located on front

Cons: -Flimsy panels are bowed when installed. I came to this case after using one of the old HAF 922 cases, which was a lot sturdier.
-Reset button is ridiculously small
-Headphone and mike ports are not colour coded, not a huge deal, it just helps when it is dark.

1 out of 1 people found this review helpful. Did you? Yes No

  • Kyle J.
  • 9/29/2014 10:49:20 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsA Great Case

Pros: As my first case, I found that this particular case has a LOT of room inside. This means that fitting in parts is relatively easy, and the same can be said for cable management. It might be a rather basic case, as far as the power button is concerned, but it is sturdy and gets the job done. The tool-free HDD bays are great as well, it makes adding and removing new hard drives easy. All in all, a great modular case that can support some a great PC.

Cons: The side panels can be a little difficult to get back on the case. I actually found it to be impossible without the help of a friend. Aside from that, not much for cons.

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  • Chad H.
  • 9/24/2014 9:49:14 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year

5 out of 5 eggsPhenominal Case

Pros: Exceptionally excellent quality case. Tons of cooling options. Water and Air options both work well. This case is clean, well built, durable, and is amazing. I replaced a CM 690 II and I didn't think twice about it. Ive owned tons of cases and this one is a champion by far. And at the price point its perfect, not to expensive, and not to cheap. Fits extremely large video cards, tons of hard drive options, lots of optical space, and cable management is a breeze.

Cons: The only thing I can point out is that Xigmatek 140mm fans have a weird lip on the mounting holes that wont allow the front bezel to seat like it should. Its not Corsairs fault but Xigmatek's, so keep that in mind with your fan options. I sliced the lip off with a razor blade and now it the fans seat perfect.

Other Thoughts: The one reviewer who claimed his Corsair H100 and H100i wouldn't fit, well hate to tell you this man, the website clearly states what will and wont fit. Its not corsairs fault you cant read manufacturers information.

0 out of 1 people found this review helpful. Did you? Yes No

  • Evan B.
  • 9/22/2014 6:21:59 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

1 out of 5 eggsNO RADIATOR SUPPORT

Pros: Great mid-size case
good price for a corsair quality case

Cons: No Radiator support, does not fit a top mount h100 or h100i NO MATTER WHAT!

0 out of 2 people found this review helpful. Did you? Yes No

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