Q300L V3 is a performance-ready mATX case designed for strong airflow and efficient cooling in a compact footprint. Built under Cooler Master’s Thermal Excellence philosophy, it supports larger GPUs and taller coolers while maintaining easy installation. As part of the Q300L family, it features modular design elements like flexible I/O placement and multiple orientation options for a versatile build experience.

• Builder-Friendly Design: Feature rich Micro ATX case with high-airflow cooling, flexible hardware support, and a compact layout that delivers premium performance without compromising on quality.
• Fits High-Performance GPUs: Supports graphics cards up to 366mm, making it easy to build with today's NVIDIA GeForce RTX and AMD Radeon gaming graphics cards
• High Airflow Cooling: Fit 6x 120mm or 140mm fans, 240mm AIO radiators, and 178mm CPU air coolers, for flexible cooling for gaming and productivity.
• Modular Everyday Design: Supports ATX power supplies up to 200mm and features a movable I/O panel, magnetic dust filters, tempered glass, and clean cable management for hassle-free builds.
• Complete Your High-Airflow Build: Pair with the Cooler Master V4 Alpha 3DHP Air Cooler, MasterFan M120, and MWE Gold 850 V3 PSU for powerful cooling, reliable power, and optimized airflow.