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COOLERMASTER MASTERBOX Q300L (BLACK)
I/o panel can be adjusted in 6 different locations and the case can be positioned: Vertical or horizontal
Edge-to-edge acrylic transparent side panel offers a full view inside
Body depth height: Can support normal size tax power supply
Front magnetic design dust filter with open perforated front, top and bottom for high air performance
Extra space behind the motherboard tray for hidden cable management
Features
PATTERNED MAGNETIC DUSTFILTERS
Special pattern on the dust filter creates a unique outlook for the chassis.
MODULAR I/O PANEL
The I/O panel can be adjusted to six different locations. On both side of the body you can install the I/O panel at the front, top or bottom.
EDGE-TO-EDGE SIDE PANEL
Show off your build through the full size transparent side panel.
CLEAN ROUTING SPACE
Behind the motherboard tray, it offers 28mm wide and spacy room for hidden cable management.
EXCELLENT THERMAL PERFORMANCE
The open design of the perforated front, top and bottom guarantees excellent thermal performance.
FAN AND RADIATOR SUPPORT
The front supports up to two 140mm fans and up to a 240mm radiator. The rear supports a 120mm fan or radiator and the top two 120mm fans. All to ensure you don't have to compromise on performance.
| Product Name | MasterBox Q300L | |
| Product Number | MCB-Q300L-KANN-S00 | |
| Available Color | Black | |
| Materials | Steel, Plastic | |
| Dimensions (LxWxH) | 387 x 230 x 378mm | |
| Motherboard Support | Micro-ATX, Mini-ITX | |
| Expansion Slots | 4 | |
| Drive Bays | 5.25" | 0 |
| 3.5" HDD | 1 | |
| 2.5" SSD | 2 | |
| I/O Port | USB 3.0 x 2, Audio In / Out | |
| Pre-installed Fan(s) | Front | N/A |
| Rear | 120mm x 1 | |
| Fan Support | Front | 120 / 140mm x 2 |
| Top | 120mm x 2 | |
| Rear | 120mm x 1 | |
| Bottom | 120mm x 1 | |
| Radiator Support | Front | 120mm x 1 / 240mm x 1 |
| Rear | 120mm x 1 | |
| Clearances | CPU Cooler | 157mm |
| PSU | 160mm | |
| GPU | 360mm | |
| Cable Routing | Behind MB Tray | 28mm |
| Power Supply Support | Bottom mount, ATX PS2 | |
| Warranty | 2 Years | |
| Note | ***Features, Price and specifications are subject to change without notice. | |
The Cooler Master MasterBox Q300L is an extraordinary mid-tower computer case designed to cater to a wide array of preferences among PC builders and enthusiasts. Built with flexibility and performance in mind, this case ofers a unique blend of functionality, aesthetics, and efficient cooling options. With its ability to adapt to various user needs and setups, the Q300L stands out as a versatile choice for budget-conscious gamers, home office setups, and compact workstation builds.
The MasterBox Q300L showcases a simple yet elegant design that is both practical and visually appealing. Constructed with durable steel and high-quality plastic materials, the case is built to last while ensuring optimal airflow and thermal performance. The case dimensions (LxWxH) of 387 x 230 x 378mm provide a balanced form factor that accommodates powerful components without taking up excessive desk space.
One of the standout features of the Q300L is its modular I/O panel. This panel can be repositioned to six different locations—both sides of the front, top, and bottom of the case. This flexibility allows users to customize their setup to suit their workspace and aesthetics, making it easier to access ports regardless of the orientation of the case.
The case is designed to be positioned either vertically or horizontally, offering additional flexibility in terms of placement. This adaptability enables users to optimize their desk space or entertainment center configuration, whether the case is used for gaming, work, or as part of an HTPC (Home Theater PC) setup.
The MasterBox Q300L features an edge-to-edge acrylic transparent side panel, providing a full view of the interior. This design element not only showcases the internal components and lighting effects but also enhances the overall aesthetics of the build. The clear panel invites users to display their hardware and meticulous cable management, making it a favorite among PC modders and RGB lighting enthusiasts.
Adding to its unique look, the Q300L includes patterned magnetic dust filters on the front and top surfaces. These filters not only contribute to the visual appeal with their special patterns but also serve a functional purpose by trapping dust and preventing it from entering the case. The magnetic attachment makes it easy to remove and clean the filters, ensuring that the interior remains dust-free and the components operate at optimal efficiency.
Ensuring excellent thermal performance is a priority for the MasterBox Q300L. The chassis features an open perforated design on the front, top, and bottom, which allows for unrestricted airflow. This design innovation helps to maintain low temperatures for the internal components, thus enhancing the overall performance and longevity of the system.
The case offers extensive fan and radiator support to cater to various cooling configurations:
This flexibility ensures that users can choose the best cooling solution according to their specific requirements, whether they prefer air cooling, liquid cooling, or a combination of both.
The Q300L supports Micro-ATX and Mini-ITX motherboards, making it a versatile choice for users looking to build compact yet powerful systems. Despite its compact size, the case does not compromise on essential features or expandability options.
The case includes a variety of drive bays to accommodate different storage needs:
While it does not include support for 5.25" optical drives, the available drive bays offer sufficient storage options for most modern builds that prioritize speed and capacity along with easy SSD installation.
With four expansion slots, users have ample room for additional GPUs, sound cards, or other expansion cards. This makes the Q300L an excellent choice for those looking to build a multi-GPU setup or requiring additional functionality through expansion cards.
Understanding the importance of a tidy and efficient interior, Cooler Master has designed the Q300L with ample cable management features. Behind the motherboard tray, an extra 28mm of space is provided for hidden cable routing, making it easier for users to achieve a clean and organized build. This not only enhances the aesthetic appeal but also improves airflow and system cooling by eliminating cable clutter.
The MasterBox Q300L offers generous clearances for various components,
