Cooler Master MasterBox Q300L Micro-ATX PC Case – vs Lian Li ATX PC Case 4 Slots Vertical GPU Kit
Updated July 2026 — Cooler Master MasterBox Q300L Micro-ATX PC Case – wins on cooling fans, Lian Li ATX PC Case 4 Slots Vertical GPU Kit wins on height and width.
The Cooler Master MasterBox Q300L offers great value and flexibility, while the Lian Li ATX GPU Kit excels in aesthetics and GPU performance. Choose based on your specific needs.
Why Cooler Master MasterBox Q300L Micro-ATX PC Case – is better
Price
More affordable at $39.99
Compatibility
Supports Micro-ATX and Mini-ITX motherboards
Cooling Options
Can accommodate multiple fans and a liquid cooler
Why Lian Li ATX PC Case 4 Slots Vertical GPU Kit is better
Performance
High-speed PCIe 5.0 riser cable
Aesthetics
Integrated RGB lighting for visual appeal
Airflow
Dual-angle tilt function improves GPU cooling
Overall score
Specifications
| Spec | Cooler Master MasterBox Q300L Micro-ATX PC Case – | Lian Li ATX PC Case 4 Slots Vertical GPU Kit |
|---|---|---|
| Price | $39.99 | $81.62 |
| Motherboard Support | Micro-ATX | ATX |
| Cooling Support | 240mm Liquid | None |
| Riser Cable | No | Yes |
| RGB Lighting | No | Yes |
Dimension comparison
Overview of the Cooler Master MasterBox Q300L
The Cooler Master MasterBox Q300L is a compact Micro-ATX PC case priced at $39.99, making it a budget-friendly option for users seeking a blend of functionality and style. This case is designed to accommodate Micro-ATX and Mini-ITX motherboards while ensuring ample interior space for easy expansion and customization.
The MasterBox Q300L features a perforated airflow design, which promotes optimal heat dissipation, and comes equipped with a magnetic dust filter that adds both functionality and aesthetic appeal. Its modular I/O panel can be repositioned in six different locations, enhancing flexibility based on user preferences. The case also supports a variety of cooling solutions, including up to five fans and a 240mm liquid cooler, making it a versatile choice for gamers and general users alike.
Overview of the Lian Li ATX PC Case 4 Slots Vertical GPU Kit
The Lian Li ATX PC Case 4 Slots Vertical GPU Kit is a premium accessory priced at $81.62, serving a specific purpose in enhancing GPU installations. Unlike typical PC cases, this kit is tailored to facilitate vertical GPU mounting, making it an attractive option for users who prioritize aesthetics and cooling performance in their builds.
This kit features a high-speed PCIe 5.0 riser cable, supporting data transfer rates of up to 32 Gbps, which is double the bandwidth of PCIe 4.0. It includes a dual-angle tilt function that improves airflow around the GPU, and an anti-sag support arm to prevent GPU droop. This tailored approach to GPU mounting ensures that users can display their graphics cards while maintaining optimal thermal performance.
Design and Aesthetics
In terms of design, the Cooler Master MasterBox Q300L showcases a modern and minimalistic aesthetic, making it suitable for both office and home environments. Its transparent side panel allows for visibility of internal components, encouraging users to showcase their builds. The unique pattern on the magnetic dust filter adds a distinctive touch, enhancing its overall visual appeal.
On the other hand, the Lian Li ATX PC Case 4 Slots Vertical GPU Kit is designed specifically for GPU visibility and airflow optimization. The dual-angle tilt function allows users to position their GPUs for both aesthetic showcase and improved cooling. With integrated RGB lighting, this kit further enhances the visual experience, making it a standout feature for builds that focus on aesthetics.
Cooling and Airflow
The Cooler Master MasterBox Q300L emphasizes airflow with its open thermal design. Its perforated structure allows for excellent ventilation, accommodating multiple fans and a liquid cooling solution. This design is particularly advantageous for users running high-performance components that generate significant heat.
Conversely, the Lian Li ATX PC Case 4 Slots Vertical GPU Kit is engineered with airflow in mind, specifically around the GPU. The dual-angle tilt function helps improve air circulation, allowing cooler air to enter and warm air to exit more efficiently. This focus on GPU cooling and positioning makes it an essential addition for users who prioritize thermal performance in their builds.
Compatibility and Installation
The Cooler Master MasterBox Q300L is compatible with Micro-ATX and Mini-ITX motherboards, and it supports standard ATX power supplies, a feature not common in similarly sized cases. This flexibility allows users to build systems that meet their specific needs without being constrained by the case size.
The Lian Li ATX PC Case 4 Slots Vertical GPU Kit is compatible with most ATX cases, requiring at least six PCIe slots for standard vertical mounting. Its adjustable position feature allows it to fit thick GPUs up to four slots, ensuring broad compatibility with modern graphics cards. However, users must be mindful of specific installation requirements to avoid conflicts with GPU features.
Price Comparison
The Cooler Master MasterBox Q300L is priced at $39.99, making it an economical choice for users looking for a compact case with excellent features. In contrast, the Lian Li ATX PC Case 4 Slots Vertical GPU Kit comes at a higher price of $81.62, which is about 104% more expensive than the MasterBox Q300L.
This price difference reflects the specialized nature of the GPU kit, which is designed to provide enhanced GPU support and aesthetics, while the MasterBox Q300L focuses on providing a versatile and compact case for a broader audience. Users must consider their specific needs when evaluating the cost-benefit of each option.
User Experience
User experience with the Cooler Master MasterBox Q300L is generally positive, particularly for those who appreciate the ability to customize their case's I/O panel and airflow configurations. The ample interior space allows for easy assembly and upgrades, making it a practical choice for both novice and experienced builders.
The Lian Li ATX PC Case 4 Slots Vertical GPU Kit offers a unique user experience by allowing for vertical GPU mounting, which can significantly enhance the visual presentation of a gaming rig. However, the installation process may require additional considerations to avoid potential conflicts with certain GPU models. Users who prioritize aesthetics and airflow will find this kit to be a valuable addition to their setups.
Which should you buy?
Choosing between the Cooler Master MasterBox Q300L and the Lian Li ATX PC Case 4 Slots Vertical GPU Kit ultimately depends on your specific needs and budget. If you're looking for a compact, affordable case that offers flexibility and good airflow, the MasterBox Q300L is an excellent choice at $39.99. However, if you want to enhance your GPU's visual appeal and performance with specialized mounting options, the Lian Li kit at $81.62 may be worth the investment, especially if aesthetics and airflow are top priorities in your build.

