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Cooler Master MasterBox Q300L Micro-ATX PC Case – vs JONSBO C6-ITX Black Mini ITX Handled Mesh PC Case,

Updated July 2026 — Cooler Master MasterBox Q300L Micro-ATX PC Case – wins on depth and height, JONSBO C6-ITX Black Mini ITX Handled Mesh PC Case, wins on cpu height.

The Cooler Master MasterBox Q300L offers better value and versatility, while the JONSBO C6-ITX excels in portability.

Why Cooler Master MasterBox Q300L Micro-ATX PC Case – is better

Price

MasterBox Q300L is $39.99 compared to $65.00 for C6-ITX.

Cooling Options

Supports up to 5 fans and a 240mm liquid cooler.

Interior Space

More room for components and future upgrades.

Why JONSBO C6-ITX Black Mini ITX Handled Mesh PC Case, is better

Portability

Includes a carry handle for easy transport.

Tool-Free Design

Simplifies assembly and disassembly.

Compact Size

Smaller footprint suitable for tight spaces.

Overall score

Cooler Master MasterBox Q300L Micro-ATX PC Case –
85
JONSBO C6-ITX Black Mini ITX Handled Mesh PC Case,
75

Specifications

SpecCooler Master MasterBox Q300L Micro-ATX PC Case –JONSBO C6-ITX Black Mini ITX Handled Mesh PC Case,
Cooling Support5 fans + 240mm2 fans
Motherboard SizeMicro-ATXMini-ITX
Price$39.99$65.00
Weight3.8 kg3.5 kg
MaterialSteel + PlasticSteel

Dimension comparison

Cooler Master MasterBox Q300L Micro-ATX PC Case –JONSBO C6-ITX Black Mini ITX Handled Mesh PC Case,

Overview of the Cooler Master MasterBox Q300L

The Cooler Master MasterBox Q300L is a compact Micro-ATX PC case designed for functionality and modularity, priced at $39.99. This case offers a unique blend of style and practicality, making it an attractive option for users looking to build a capable gaming or office PC. It features a perforated design for optimal airflow and a transparent side panel that showcases your components.

The MasterBox Q300L excels in its ability to accommodate a range of hardware despite its small footprint. Users can install Micro-ATX or Mini-ITX motherboards, and it supports a maximum GPU length of 360mm and CPU coolers up to 159mm tall. The modular I/O panel can be adjusted to suit various configurations, making it a versatile choice for different setups.

Overview of the JONSBO C6-ITX

The JONSBO C6-ITX is a compact Mini ITX handled mesh PC case retailing for $65.00. This case is designed for users who prioritize portability and simplicity in their builds. Its mesh structure allows for excellent airflow, while the adjustable carry handle enhances its mobility for those who may need to transport their systems.

While the C6-ITX is slightly more expensive than the MasterBox Q300L, it offers a unique tool-free structure for easy disassembly, making it user-friendly for builders of all skill levels. The case supports Mini-ITX and Mini-DTX motherboards and can accommodate GPUs up to 255mm long and CPU coolers up to 170mm tall, providing ample room for essential components.

Design and Aesthetics

In terms of design, the Cooler Master MasterBox Q300L stands out with its modern and distinctive appearance. Its perforated sides not only enhance airflow but also give it a unique aesthetic that appeals to many users. The transparent side panel allows for showcasing internal components, making it a favorite among gamers who want to display their builds.

Conversely, the JONSBO C6-ITX adopts a more minimalist approach with its mesh design. While it may not offer the same visual flair as the MasterBox Q300L, its practical design is well-suited for users who prefer simplicity and functionality. The handle adds a unique touch, making it easy to carry, which is particularly advantageous for LAN parties or events.

Cooling Performance

Cooling performance is a critical factor for any PC case, and both the Cooler Master MasterBox Q300L and the JONSBO C6-ITX provide solid solutions. The MasterBox Q300L supports multiple cooling configurations, accommodating a 240mm liquid cooler and up to five fans, ensuring excellent thermal management for high-performance builds.

On the other hand, the JONSBO C6-ITX also emphasizes airflow with its fully meshed design. While it can support a single 120mm fan at the top and one at the rear, it is inherently limited compared to the MasterBox Q300L’s extensive cooling options. If cooling is a top priority, the MasterBox may have the edge due to its versatility and higher fan capacity.

Interior Space and Component Compatibility

The Cooler Master MasterBox Q300L boasts an ample interior space that allows for easy installation of components. It can accommodate both Micro-ATX and Mini-ITX motherboards while supporting a powerful GPU and CPU cooler without much hassle. This flexibility is a significant advantage for users looking to future-proof their builds or upgrade components over time.

In contrast, the JONSBO C6-ITX is more restricted in terms of component compatibility. Designed specifically for Mini-ITX and Mini-DTX motherboards, it limits future expansion options. However, it still provides enough space for essential components, making it suitable for compact builds, especially for users who prioritize a small footprint over extensive upgrade options.

Portability and Convenience

Portability is a key feature of the JONSBO C6-ITX, thanks to its adjustable carry handle that uses a Velcro fastener. This design makes it convenient for users who need to transport their PC frequently. Additionally, the tool-free open structure simplifies the assembly process, making it easier for users to modify or clean their builds.

The Cooler Master MasterBox Q300L, while not specifically designed for portability, does offer modularity in its I/O panel positioning, allowing users to customize their setups. However, it lacks the transport-friendly features that the C6-ITX provides, which could be a deciding factor for those who attend gaming events or LAN parties.

Pricing Comparison

The Cooler Master MasterBox Q300L is priced at $39.99, making it about 38% cheaper than the JONSBO C6-ITX, which retails for $65.00. This significant price difference may appeal to budget-conscious builders who still want a capable case without sacrificing essential features.

While the C6-ITX offers unique portability and a tool-free design, the price premium may not be justifiable for all users. The MasterBox Q300L delivers excellent value for its price, making it an appealing option for those looking for a reliable case without breaking the bank.

Which should you buy?

Choosing between the Cooler Master MasterBox Q300L and the JONSBO C6-ITX ultimately depends on your specific needs. If you're looking for a compact case with excellent airflow, versatile cooling options, and a lower price point, the MasterBox Q300L is a fantastic choice. Its modularity and ample interior space provide room for future upgrades and expansions.

However, if portability and ease of assembly are your top priorities, the JONSBO C6-ITX may be worth the additional cost. Its compact design and transport-friendly features make it suitable for users who frequently move their systems. Consider your usage scenario and preferences carefully to make the best decision for your build.