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Antec Flux Pro, 6 x PWM Fans Included, vs Cooler Master MasterBox Q300L Micro-ATX PC Case –

Updated July 2026 — Antec Flux Pro, 6 x PWM Fans Included, leads on fan slots and depth.

The Antec Flux Pro excels in aesthetics and cooling performance, while the Cooler Master MasterBox Q300L offers a budget-friendly option with essential features.

Why Antec Flux Pro, 6 x PWM Fans Included, is better

Cooling

Supports up to 12 fans

Materials

Crafted with metal, glass, and wood

Features

Includes dual temperature display

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

Price

More affordable at $39.99

Size

Compact design for smaller builds

Modularity

Adjustable I/O panel

Overall score

Antec Flux Pro, 6 x PWM Fans Included,
85
Cooler Master MasterBox Q300L Micro-ATX PC Case –
65

Specifications

SpecAntec Flux Pro, 6 x PWM Fans Included,Cooler Master MasterBox Q300L Micro-ATX PC Case –
Cooling Support12 fans5 fans
Material QualityHigh-endStandard
I/O PanelFixedModular
Radiator Size420mm + 360mm240mm
Price$179.99$39.99

Dimension comparison

Antec Flux Pro, 6 x PWM Fans Included,Cooler Master MasterBox Q300L Micro-ATX PC Case –

Design and Aesthetics

The Antec Flux Pro offers a sophisticated design with a combination of metal, glass, and walnut wood, while the Cooler Master MasterBox Q300L features a more utilitarian look with a transparent side panel. The Flux Pro’s high-quality materials create a premium aesthetic that appeals to those seeking elegance in their PC build. Conversely, the MasterBox Q300L, designed for practicality, emphasizes airflow with its perforated surfaces and modular I/O panel, allowing users to customize the case to their liking. Both cases have their unique charm, but the Antec Flux Pro stands out if you're looking for a more refined and visually striking option.

Cooling and Airflow

Cooling performance is a significant differentiator between the two cases. The Antec Flux Pro supports up to 12 fans simultaneously, including six pre-installed fans, ensuring excellent airflow and temperature management. In contrast, the Cooler Master MasterBox Q300L accommodates up to five fans and supports a 240mm liquid cooler. While both cases are designed to promote airflow, the Antec Flux Pro offers a more extensive cooling capability, making it the better choice for high-performance builds that require superior thermal management.

Space and Compatibility

When it comes to internal space and compatibility, the Antec Flux Pro is engineered to support larger configurations, accommodating E-ATX motherboards and offering ample space for extensive upgrades. The Cooler Master MasterBox Q300L, while compact, is still versatile enough for Micro-ATX and Mini-ITX motherboards, making it suitable for smaller builds. However, it has limitations on component sizes, supporting CPU coolers up to 159mm in height and GPUs up to 360mm. For those who prioritize expandability and high-end components, the Antec Flux Pro is the clear winner.

Price Point

The Antec Flux Pro is priced at $179.99, significantly higher than the Cooler Master MasterBox Q300L, which retails for just $39.99. This price difference of $140 is about 350% higher for the Antec model. While the Flux Pro offers premium features and materials, the MasterBox Q300L presents a budget-friendly option for users who may not need extensive cooling or high-end aesthetics. If you’re looking for a cost-effective solution, the Cooler Master case is hard to beat.

Installation and Assembly

Both cases offer straightforward installation processes, but the Antec Flux Pro includes innovative features like removable cooling brackets and a unique iShift PSU 90° mount that facilitates easier assembly and cable management. The Cooler Master MasterBox Q300L, while also user-friendly, focuses on modularity with its adjustable I/O panel, allowing it to fit various setups. However, the additional features of the Antec case may appeal to users who value a more convenient assembly experience.

Features and Functionality

The Antec Flux Pro is packed with features, including a CPU/GPU dual temperature display and support for simultaneous installation of both a 420mm and a 360mm radiator. These attributes cater to high-performance users who demand more from their cases. On the other hand, the Cooler Master MasterBox Q300L features magnetic dust filters and an open thermal design but lacks the advanced features seen in the Antec model. For users who prioritize functionality and advanced cooling solutions, the Antec Flux Pro provides superior options.

Target Audience

The Antec Flux Pro is ideally suited for enthusiasts and gamers who desire a high-end, aesthetically pleasing build with extensive cooling capabilities. Its premium materials and advanced features justify its higher price point. In contrast, the Cooler Master MasterBox Q300L targets budget-conscious users and those building compact systems, offering essential features without unnecessary frills. If you’re looking for a case that balances performance and cost, the Cooler Master model is a compelling choice.

Which should you buy?

Deciding between the Antec Flux Pro and the Cooler Master MasterBox Q300L ultimately hinges on your specific needs and budget. If you prioritize aesthetics, higher cooling performance, and advanced features, the Antec Flux Pro is worth the investment at $179.99. However, if you’re looking for a more compact, budget-friendly case that still delivers on functionality, the Cooler Master MasterBox Q300L at $39.99 is an excellent option. Each case serves different user needs, so choose based on what features align best with your PC-building goals.