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Cooler Master MasterBox Q300L Micro-ATX Tower with Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow, Black (MCB-Q300L-KANN-S00)

TLDR Review: Cooler Master MasterBox Q300L

Item: Cooler Master MasterBox Q300L
Author: ShopSavvy

By ShopSavvy Team

Published: August 10th, 2025

Pros

•Great for beginners and budgeonscious buyers, offering excellent value.
•Efficient airflow design with multiple fan installation options, improving cooling performance significantly.
•Compact and lightweight, making it easy to handle and assemble.
•Magnetic dust filters are useriendly, easy to clean, and enhance maintenance.
•Outstanding cable management with sufficient space for neat organization.
•Movable side I/O panel adds setup flexibility.
•Build quality exceeds expectations for the price range, suitable for both budget and hignd projects.
•Aesthetically pleasing design with a true black color and sleek appearance.

Cons

•Acrylic side panel prone to fingerprints.
•Dust filters may shift slightly but don't affect performance significantly.
•Tight fan spacing may require thinner fans to avoid interference with components.
•Limited to one 3.5” drive bay, which can restrict those needing larger HDD capacities.
•Absence of a PSU shroud, which some users consider a premium feature.

Bottom Line

The Cooler Master MasterBox Q300L is a fantastic choice for budget builds and beginners, offering excellent airflow and cable management in a compact, aesthetically pleasing package. While it lacks some premium features like a PSU shroud and has limited drive bay options, its solid build quality and adaptability make it a superb option for those seeking both performance and value without breaking the bank.

Lowest at any Popular Retailer

$39.99 at Amazon