🖤 Compact power, limitless style — build your dream rig with MasterBox Q300L!
The Cooler Master MasterBox Q300L is a versatile micro-ATX mini-tower case designed for professionals and gamers who demand flexibility and style. Featuring a fully adjustable I/O panel, a transparent acrylic side panel for full component visibility, and a high-performance ventilation system with magnetic dust filters, it supports a wide range of hardware including large GPUs and multiple cooling solutions. Its compact footprint and smart cable management options make it perfect for clean, powerful builds that stand out in any workspace.
| ASIN | B0785GRMPG |
| Antenna Location | Gaming, General Computing |
| Best Sellers Rank | #37,777 in Computers ( See Top 100 in Computers ) #257 in Computer Cases |
| Brand | Cooler Master |
| Built-In Media | 1 computer case |
| Case Type | Mini-Tower |
| Case type | Mini-Tower |
| Color | Black |
| Colour | Black |
| Compatible Devices | Micro-ATX and Mini-ITX motherboards, Cooler Master devices |
| Cooling Method | Fan |
| Customer Reviews | 4.5 out of 5 stars 16,489 Reviews |
| Enclosure Material | Alloy Steel Plastic |
| Fan Size | 120 Millimeters |
| Global Trade Identification Number | 00884102038006, 00884102095313, 04719512065488 |
| Hard Disk Form Factor | 3.5 Inches |
| Internal Bays Quantity | 1 |
| Item Dimensions D x W x H | 39.1D x 23W x 38.1H centimeters |
| Item Type Name | grocery |
| Item Weight | 480 Grams |
| Item height | 15 inches |
| Manufacturer | Cooler Master |
| Material | Alloy Steel Plastic |
| Model Name | Q300L |
| Motherboard compatability | Micro-ATX and Mini-ITX |
| Number of Fans | 3 |
| Other Special Features of the Product | Magnetic Dust Filters |
| Power Supply Maximum Output | 500 Watts |
| Power Supply Mounting Type | Bottom Mount |
| Recommended uses for product | Gaming, General Computing |
| Supported Motherboard | Micro-ATX and Mini-ITX |
| Total Expansion Slots Quantity | 4 |
| Total USB 3.0 Ports | 2 |
| Total Usb Ports | 2 |
| UPC | 884102095313 884102038006 |
J**.
Best for compact purposes. will fit big luggage for check-in.
While nothing is really perfect, this modular case lets you style give you a lot of options for your PC. Small form factor case for your mATX (perfect fit) and ATX (pushing it a bit but still okay). Can accommodate long GPUs. You have the liberty to fix CPU components (PSU, Fans, I/O Panel) as you like. Cooling is a bit tricky but should be fine after a few arranging of parts which i totally love about it. I enjoyed arranging components to get where i wanted. Plenty of wire routing options which are stealthy for a cleaner install. While cooling takes a bit effort compared to mid-tower/full towers, Im sure this will accommodate more cooling parts and be way cooler than your regular small form factor ITX cases. will buy another one for a future project if needed.
F**O
Compact
Smallest case I could find that fits a full ATX motherboard. Had to add fans to get proper airflow. Otherwise perfect for such a small case.
A**D
average quality
good small size and good price average quality
M**5
جميل بتصميم انيق وتبريد جيد
الصندوقQ500l شكله جميل واماكن تركيب الكابلات فيه جيدة لقد قمت بتركيب لوحة ام من نوع micro ATX ولم اواجه اي مشكلات في التركيب و المروحة الخلفية صوتها منخفض وجودتها ممتازة ، ولاكن مكان وضع مزود الطاقة موجه الى الواجهة الامامية للصندوق فسوف تسمع صوت مروحة الباور سبلاي فقط اذا كان صوتها عالً اما اذا كان منخفض فلابئس بذلك، انصح بشرائه بهذه السعر.
W**S
Best compact atx case
Best compact full atx case. Need tweaking for better airflow.
A**A
Quality
Solid product for the price, happy to buy
E**O
Micro Case with ATX Mobo
Best casing I ever bought. Small and light. My gigabyte 1080 fit this inside and still more space inside.
M**K
Not the best case, mediocre build quality
The case is not that good Build quality is mediocre, with plastic every where The case was a bit difficult to build in due to space Air flow was bad, immediate temperature rise, even I was surprised, and this utilizing as much fans as possible Manual was basic but it covered important information Bottom filter is attached with 4 pins/lock and is easily bendable I do not recommend this product
Trustpilot
2 months ago
4 days ago
