The MasterFrame 400 Mesh is a premium open-frame compact chassis crafted for Micro-ATX and Mini-ITX platforms. Embracing the FreeForm 2.0 design philosophy, it features a precision aluminum frame, dual-orientation support, and enhanced mesh airflow. With premium aesthetics and performance-grade clearance, it empowers creators and builders to push compact PC design further.

Compact Power, No Compromise.

MasterFrame 400 Mesh

Premium open-frame Micro-ATX case designed for compact performance builds, efficient airflow, and refined structural design inspired by the FreeForm 2.0 platform.

FreeForm 2.0 Exo-structure

The exposed aluminum frame supports versatile positioning and adapts seamlessly to both vertical and horizontal layouts.

Dual-Orientation Ready

Stand it tall, lay it flat, or flip it sideways. Detachable feet and a smart, adaptable design make it easy to fit any workspace or creative setup.

*Vertical orientation may require additional accessories or adapters depending on component layout, connector clearance, or cable routing.

Compact Motherboard Compatibility

Supports Mini-ITX and Micro-ATX motherboards, delivering optimal compatibility for compact, high-performance builds without compromising cooling or component clearance.

Ample GPU Clearance

Accommodates graphics cards up to 390mm in length, providing full compatibility for high-end GPUs and future upgrades.

Extensive Cooling Support

Supports up to nine fans, including 200 mm fans compatibility, plus top-mounted 360 mm radiators for superior airflow in a compact build.

*200 mm fan support varies by location and fan thickness.

TOOL-FREE PANEL REMOVAL

Easily remove side panels without tools for quick access and modifications during build or upgrades.

INCLUDED GPU SUPPORT BRACKET

The included GPU support bracket prevents GPU sag and ensures stability during intense gaming or high-performance workloads, maintaining a clean and secure build.

MODERN FRONT I/O

Stay connected and ready for anything—MasterFrame 400 Mesh features USB 3.2 Gen 2x2 Type-C, dual USB 3.2 Gen 1 Type-A, and a combo audio jack for ultra-fast data, charging, and seamless peripheral support.

ARGB VISUAL POWER

Despite its compact size, the MasterFrame 400 Mesh comes alive with a pre-installed 120 mm SickleFlow ARGB fan—quiet, powerful, and fully customizable.

Specifications

Product NameMasterFrame 400 Mesh
Color(s)Black / Silver
Model NumberBlack: MF400M-KHNN-S00
Model NumberSilver: MF400M-SHNN-S00
MaterialsAL+ SGCC + TG / Mesh
Dimensions (L x W x H)471 x 261 x 373.8 mm (Incl. Protrusions), 471 x 261 x 361 mm (Excl. Protrusions)
Volume44.37 L (w/o protrusions), 46 L (with panel, protrusions and feet)
Motherboard SupportMini-ITX, Micro-ATX
PCI Expansion Slots4
Drive Bays - 5.25" ODDN/A
Drive Bays - 3.5" HDD1 (Only supported without bottom fans. Shares 3.5" and 2.5" mounting positions.)
Drive Bays - 2.5" SSD1 (Only supported without bottom fans. Shares 3.5" and 2.5" mounting positions.)
I/O Panel - USB Ports2 x USB 3.2 Gen 1 Type A / 1 x USB 3.2 Gen 2 x 2 Type C
I/O Panel - Audio In / Out1 x 3.5 Mic / Audio Combo Jack
Pre-installed Fans - Rear1x SickleFlow 120 mm ARGB Black / 1x SickleFlow 120 mm ARGB White
Fan Support - Front2 x 120mm / 1 x 140mm*, 1 x 180mm*, 1 x 200mm* (*Conditional Support)
Fan Support - Top3 x 120mm / 2 x 140mm / 2 x 180mm*, 2 x 200mm* (*Fan thickness ≤ 25.5mm)
Fan Support - Rear1x 120mm
Fan Support - Bottom3x 120mm, 2x 140mm, 2x 180mm, 2x 200mm, and all fans up to 30mm thick.
Radiator Support - FrontN/A
Radiator Support - Top240 / 280 / 360 mm
Radiator Support - Rear120 mm
Radiator Support - BottomN/A
Clearances - CPU Cooler190 mm
Clearances - Power Supply160 mm
Clearances - Graphics Card390 mm
Cable Routing - Behind Motherboard Tray43 mm
AccessoryGraphics Card Holder
Dust FiltersFront, Side
Power Supply SupportATX
Warranty2 years
SeriesMasterFrame Series
SizeMid Tower

PC Cases

Cooler Master Riser Cable - PCIe 4.0 x16 - 200mm - White

Cooler Master Riser Cable - PCIe 4.0 x16 - 300mm - White

Cooler Master Riser Cable - PCIe 4.0 x16 - 200mm - Black/Purple

MasterFrame 600 Silver

Ncore 100 Riser Cable

Case Panel Stone MasterFrame 500/600

Case Panel Natural MasterFrame 500/600

MasterFrame 400 Mesh

MasterBox B311L

MasterFrame 600 Black