Labor Day SaleEnds September 7. Limited quantities. No rainchecks.Shop now

Skip to contentGo to Product Search
Main Content

Cooler Master - MasterBox Micro ATX Mini-Tower Case with Magnetic Filters and Adjustable I/O Panel - Black

Model: MCBQ300LKANNS00
SKU: 12934958
Sold & shipped by

About this product

House your build with this Cooler Master computer tower. Six possible adjustments let you change the position of the I/O panel for variable mounting, and the tempered glass side displays your system clearly. This Cooler Master computer tower reserves 28mm of space behind the motherboard tray for organized cable storage.

Features
  • Steel construction

    Provides durability for long-lasting use.

  • 3 drive bays

    Include 2 internal 2.5" and 1 internal 3.5" drive bays for installing a variety of components.

  • Front-panel ports

    Include 2 USB 3.0, 1 microphone and 1 headphones for installing peripherals.

  • 4 expansion slots

    For adding graphics cards and other components.

  • Cable management

    Lets you easily route cables for enhanced system airflow.

  • Supports microATX and Mini-ITX motherboards

    For use with a wide range of systems.

See all features
Specifications
  • Motherboard Form Factor
    microATX, Mini-ITX
    Maximum GPU Length
    360 millimeters
    Product Height
    14.9 inches
    Product Width
    9.1 inches
    Product Depth
    15.2 inches
    Window Panel(s)
    Side
Sponsored

Reviews

Rating 4.4 out of 5 stars with 11 reviews

91% would recommend to a friend

Customer Images

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.

  • Rated 5 out of 5 stars

    A great case with a low price and high quality

    I am running this case with the included fan, and an additional 120 and 140 mm fan. It is being used with AMD Ryzen 5 5600X and Nvidia RTX 3060 ti. With this setup the cooling is very good and the case is very clean. I love the runs for the cables and the mesh fan filters are very cool. I have seen other reviews saying that the filters reduce cooling performance however I ran tests and did not notice this. The case was shipped in a good box with high quality foam and there were no issues building the computer. I definitely recommend this case for anyone who wants a good quality low cost case as long as you don't mind spending the time optimizing your fans and setup to ensure thermals are good.

    This review is from Cooler Master - MasterBox Micro ATX Mini-Tower Case with Magnetic Filters and Adjustable I/O Panel - Black

    Posted by Nick

  • Rated 3 out of 5 stars

    Lacking airflow, otherwise good

    I purchased this case hoping that it would have good airflow. It, unfortunately, isn't great. I was lucky to not be running many hot-running components (I have a ryzen 5 2600 and a gtx 1050 ti low profile), but if you happen to have a higher end CPU or GPU, I would recommend looking into a different case. On the plus side, there is room for 6 fans, which I took advantage of, but while my temperatures aren't bad, they are certainly somewhat disappointing. That being said, the case is priced quite well and looks quite striking. You can add an RGB strip along the acrylic as there is a small gap, and any RGB fans would also look nice behind the stylized mesh. Speaking of which, the mesh panels are magnetic and can be dusted out. As with any case at this price point, you are going to make sacrifices. It's also quite compact, even for a micro atx case. The side panel is acrylic, not tempered glass. The pci covers are pop-out, so once you take one out, it's bent and can't be installed again. The standoffs aren't installed, and it's quite difficult to do so; it's entirely possible that I made a beginner mistake, but I had to use pliers to twist them on. The power supply also has a pretty strange mounting mechanism, where it doesn't sit in line with the rest of the case, but instead, a good inch or so in the actual case. Overall, it has a lot of great features, especially if you're willing to put up with the drawbacks of a cheaper case, but is strangely lacking in key areas. I recommend purchasing this case if you want a compact micro atx case and you're prepared to spend a pretty penny on a cooling solution.

    This review is from Cooler Master - MasterBox Micro ATX Mini-Tower Case with Magnetic Filters and Adjustable I/O Panel - Black

    Posted by mouse

  • Rated 2 out of 5 stars

    Budget Case for sure

    Definitely a budget case. Everything was going well until I went to install the fans. I couldn't find the holes for the 140mm fans. Allegedly the front of the case supports two. I may have seen where the 120mm fans go but the screws I had were too big. I ended up having to drill them out a bit. The modular i/o panel, for me at least, it fell apart. The plastic piece that pushes the actual power switch fell out and I can't figure out how to put it back together. I do like that the case can be vertical or horizontal. It can pretty much fit anywhere

    This review is from Cooler Master - MasterBox Micro ATX Mini-Tower Case with Magnetic Filters and Adjustable I/O Panel - Black

    Posted by Chelsea

  • Rated 5 out of 5 stars

    Awesome case for an unbeatable price!

    This is the smallest case I’ve ever built in. With that being said it’s also very spacious to work inside and there’s so many variable ways to position this case as the power button and USB ports are able to move to any side of the case you choose. Also the case has plenty of airflow and fits up to 4x140mm fans with 1x120mm at the back. If you wanted there’s also plenty of room to mount a fan in the bottom of the case as well. I highly recommend this case for compact builds.

    This review is from Cooler Master - MasterBox Micro ATX Mini-Tower Case with Magnetic Filters and Adjustable I/O Panel - Black

    Posted by Bdon1313

  • Rated 5 out of 5 stars

    solid clean case for matx boards.

    This case is nice and easy to install components. alot of space to work with. Cons: acrylic/plastic clear panel is easily scratched. wish it was tempered glass.

    This review is from Cooler Master - MasterBox Micro ATX Mini-Tower Case with Magnetic Filters and Adjustable I/O Panel - Black

    Posted by Bonbon

  • Customer reviews from bestbuy-ca

    Syndicated rating, 1 out of 5 stars with 1 review on bestbuy-ca.

    See all bestbuy-ca reviews

Compare similar products

Cooler Master - MasterBox Micro ATX Mini-Tower Case with Magnetic Filters and Adjustable I/O Panel - Black
Cooler Master - MasterBox Micro ATX Mini-Tower Case with Magnetic Filters and Adjustable I/O Panel - Black
4.4(11)

House your build with this Cooler Master computer tower. Six possible adjustments let you change the position of the I/O panel for variable mounting, and the tempered glass side displays your system clearly. This Cooler Master computer tower reserves 28mm of space behind the motherboard tray for organized cable storage.

Antec - NX200M Micro-ATX Tower, Mini-Tower Case with 120mm Fan, Mesh Vent, Black - Black

Antec NX200M Micro-ATX Tower, Mini-Tower Computer Case with 120mm Rear Fan Pre-Installed, Mesh Design in Front Panel Ventilated Airflow, NX Series, Black

NZXT - H5 Flow 2024 Compact ATX Mid-Tower Airflow PC Case - Black

The H5 Flow boosts airflow and GPU cooling with its fully-perforated PSU shroud, mesh panels, and robust radiator support.

Thermaltake - Versa H18 TG Mid Tower Case - Black/Blue
4.4(29)

Designed for entry-level PC builders and gamers, Thermaltake Versa H18 Tempered Glass Edition Micro Case features the simplicity appearance with easy cable management design, AIO liquid cooling compatible, and ample ventilation options. Supporting the latest PC hardware and all high-end GPU solutions, the Versa H18 TG is a good choice for those who opt for stylish PC case with manageable frame size and advanced features.The beautiful tempered glass window allows users to display all component of the build, offering a direct view of inner system. The mesh front panel and perforated top panel plus the heighted foot-stands at the bottom provide efficient airflow for the system.

Pros for Cooler Master - MasterBox Micro ATX Mini-Tower Case with Magnetic Filters and Adjustable I/O Panel - Black
There were no pros for this productThere were no pros for this productCable Management, Airflow, Ease of Use, Overall Performance, DesignCable Management, Build Quality
Cons for Cooler Master - MasterBox Micro ATX Mini-Tower Case with Magnetic Filters and Adjustable I/O Panel - Black
There were no cons for this productThere were no cons for this productSize, Fan CountSize, Button Placement

Specs

Questions & Answers
  • Does this case support all form factors of power supplies?

    I would say yes. If you're just doing a gaming PC build, the standard atx psu is good. I got a 700w Thermaltake 80+. In hindsight, I probably would have went with a modular PSU for cable management as the case is small.

    Answered by Chelsea
  • Does this fit a hyper 212 black edition cpu cooler?

    Yes, it will.

    Answered by banhMiThitBo
  • How many case fans are included? 1 exhaust and 2 intake?

    One rear exhaust.

    Answered by crimson9mm
  • Will this case will work with dell optiplex 745 computer

    Good question. That's an older model and I think it's the old fashioned mid-tower desktop. It would be difficult to say without knowing what model your motherboard is inside.

    Answered by Dooner
  • Does this come with a pc fan and how many do fans do it need

    No, this product does not come with a pc fan.

    Answered by CommunityAnswer
Ask a question
No content

Customers often buy these together

Sponsored

Finance Options

My Best Buy® Credit Card
Buy Now, Pay Later