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Model : Cooler Master MasterFrame 400 Mesh Micro-ATX Case
SKU : ATX-COOL MASTERFRAM 400 B

The Cooler Master MasterFrame 400 Mesh is a bold, visually distinctive Micro-ATX gaming case that reimagines the compact PC chassis through an open-frame mesh design philosophy — delivering maximum airflow, spectacular component visibility, and a uniquely architectural aesthetic that transforms the PC case from a closed box into an open, gallery-like showcase for premium components. The MasterFrame 400's mesh construction eliminates the solid panel barriers that conventional cases use to enclose components — replacing them with an open mesh framework that allows unrestricted air movement through every face of the chassis simultaneously, creating a thermal environment that dramatically outperforms solid-panel alternatives for sustained high-load gaming and compute-intensive workloads. Supporting both Mini-ITX and Micro-ATX motherboards with clearance for 360mm liquid cooling radiators and including a pre-installed RGB fan for immediate out-of-the-box visual impact, the MasterFrame 400 Mesh delivers the rare combination of compact form factor, open-frame airflow freedom, large radiator compatibility, and RGB aesthetic in a Micro-ATX chassis that sets it apart from every conventional closed-panel compact case in the market. For builders who want maximum thermal performance, showcase component visibility, and architectural visual presence in a compact Micro-ATX package, the Cooler Master MasterFrame 400 Mesh is the open-frame gaming chassis that proves airflow and aesthetics are not competing priorities — they are the same priority.
Performance / Technology
The MasterFrame 400 Mesh's open-frame construction represents the thermal performance extreme of PC case design — eliminating the solid panel barriers that create airflow resistance, pressure buildup, and heat recirculation in conventional closed cases to achieve a thermal environment where ambient air flows freely through every component zone simultaneously. In conventional closed cases, cooling performance is constrained by the quantity, size, and positioning of the case fans that move air through defined intake and exhaust pathways — the solid panels limiting airflow to these specific fan-driven channels regardless of how many fans are installed. The open mesh framework eliminates these constraints entirely — allowing natural convection, panel-face crossflows, and component-level airflow to supplement fan-driven air movement for a thermal environment that achieves lower component temperatures under equivalent fan configurations than closed alternatives.
The 360mm radiator support is a particularly significant capability for a compact Micro-ATX chassis — most compact cases in the Micro-ATX category limit radiator size to 240mm due to the spatial constraints of fitting a large radiator within the chassis's structural framework. The MasterFrame 400 Mesh's open-frame design removes many of the conventional spatial constraints by eliminating the solid panels that typically compete for the mounting space that radiators occupy — enabling the full 360mm radiator width to be accommodated within the compact chassis dimensions through creative placement that the open framework facilitates.
Why This Product Stands Out
The Cooler Master MasterFrame 400 Mesh stands apart in the compact Micro-ATX case market through its rare combination of open-frame mesh maximum airflow, 360mm radiator clearance, dual Mini-ITX and Micro-ATX motherboard support, pre-installed RGB fan, and Cooler Master's engineering quality — creating a compact chassis that delivers the thermal performance of open-frame design, the radiator cooling capability of larger cases, the component showcase visibility of a display frame, and the motherboard flexibility of dual form factor support in a single compact package. For builders who want maximum airflow performance, maximum component visibility, and maximum design distinctiveness in a compact gaming chassis without the physical footprint of full-tower open-frame alternatives, the MasterFrame 400 Mesh delivers the complete open-frame compact gaming experience that no conventional closed-panel Micro-ATX case can approach.
Feature | Specification |
|---|---|
Model & Colors | MasterFrame 400 Mesh | Black (MF400M-KHNN-S00) |
Form Factor & Build | Mid Tower | AL + SGCC + TG / Mesh Materials |
Motherboard Support | Micro-ATX, Mini-ITX |
Storage & Expansion | 1x 3.5" HDD or 1x 2.5" SSD (shared mount, w/o bottom fans) | 4x PCI Expansion Slots |
Clearances | CPU Cooler: 190 mm | GPU: 390 mm | PSU: 160 mm | Cable Routing: 43 mm |
Fan Support | Top: 3x 120mm / 2x 140/180/200mm | Bottom: 3x 120mm / 2x 140/180/200mm | Front: 2x 120mm / 1x 140/180/200mm | Rear: 1x 120mm |
Radiator Support | Top: 240 / 280 / 360 mm | Rear: 120 mm |
Pre-installed Cooling | 1x SickleFlow 120 mm ARGB Fan (Rear) |
Dust Filters | Front, Side |
Front I/O Panel | 1x USB 3.2 Gen 2x2 Type-C, 2x USB 3.2 Gen 1 Type-A, 1x 3.5mm Mic/Audio Combo |
Power Supply Support | ATX |
Dimensions & Volume | 471 x 261 x 373.8 mm (Incl. Protrusions) | 46 L Volume (max) |
Included Accessories | Graphics Card Holder |
Warranty | 1 Years |