Cooler Master
Cooler Master MasterFrame 400 Micro-ATX Case
Bottom line: The Cooler Master MasterFrame 400 Micro-ATX Case is a Micro-ATX case; it fits graphics cards up to 390mm long and a 360mm radiator (manufacturer spec), priced around $199.99 on Amazon as of 2026-10-06.
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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Backed by Cooler Master's warranty and support channels
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated
Manufacturer description
Designed for compact performance, MasterFrame 400 Mesh is a Micro-ATX/Mini-ITX open-frame chassis with a modular structure powered by Cooler Master’s FreeForm 2.0. It features magnetic mesh side panels, tool-free access, and support for dual orientations for flexible display and airflow optimization. Despite its small footprint, it supports 360mm radiators, high-performance GPUs, and custom cooling setups. Whether for clean showcase builds, portable systems, or creative workstation setups, the 400 Mesh offers full-sized modularity in a minimal space, giving users the freedom to build…
SpecPicks Verdict
SpecPicks scored Cooler Master MasterFrame 400 Micro-ATX Case using a rating × review-volume × price-fit model applied to published specs and reviews across the pc cases category. Cooler Master's pc cases lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for pc cases of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- Flexible Layouts: Switch between vertical, horizontal, or inverted layouts to fit your desk, workflow, and style.
- Build Your Way: The aluminum open-frame design delivers structural rigidity, clean airflow, and a bold, functional aesthetic.
- Compact Yet Powerful: Fits Mini-ITX and Micro-ATX builds with space for up to nine fans, a top-mounted 360 mm radiator, and 390 mm GPUs with anti-sag support for cool, stable performance.
- Future-Ready Connections: Front I/O includes USB 3.2 Gen 2x2 Type-C, dual USB 3.2 Gen 1 Type-A, and combo audio, giving you the speed and convenience modern setups demand.
- Modern Front I/O: Equipped with USB 3.2 Gen 2 Type-C, dual USB 3.2 Gen 1 Type-A ports, and a combo audio jack for fast connectivity and charging.
Full Specifications
| Brand | Cooler Master |
|---|---|
| Color | Black |
| Material | Aluminum, Metal, Tempered Glass |
| Case Type | Mini-Tower |
| Model Name | MasterFrame 400 |
| Unit Count | 1 Count |
| Connectivity | USB-C |
| Model Number | MF400M-KHNN-S00 |
| Compatibility | Switch |
| Build Your Way | The aluminum open-frame design delivers structural rigidity, clean airflow, and a bold, functional aesthetic. |
| Cooling Method | Air |
| Mfr Part Number | MF400M-KHNN-S00 |
| Antenna Location | Business, Gaming |
| Flexible Layouts | Switch between vertical, horizontal, or inverted layouts to fit your desk, workflow, and style. |
| Modern Front I/O | Equipped with USB 3.2 Gen 2 Type-C, dual USB 3.2 Gen 1 Type-A ports, and a combo audio jack for fast connectivity and charging. |
| Compatible Devices | Micro-ATX, Mini-ITX motherboards, 390mm GPUs, 360mm radiators |
| Enclosure Material | Aluminum, Metal, Tempered Glass |
| Warranty Description | 2 Year Manufacturer |
| Supported Motherboard | Micro-ATX, Mini-ITX |
| Future-Ready Connections | Front I/O includes USB 3.2 Gen 2x2 Type-C, dual USB 3.2 Gen 1 Type-A, and combo audio, giving you the speed and convenience modern setups demand. |
| Full listing title | Cooler Master MasterFrame 400 Micro-ATX Case, High Airflow, 360mm AIO | 390mm Graphics Card Support, 360mm AIO Support, Micro-ATX Motherboards, ARGB Fan, USB-C 3.2, Aluminum, AI Workstation |
Ready to buy?
Cooler Master MasterFrame 400 Micro-ATX Case, High Airflow, 360mm AIO | 390mm Graphics Card Support, 360mm AIO Support, Micro-ATX Motherboards, ARGB Fan, USB-C 3.2, Aluminum, AI Workstation is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
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