Cooler Master

Cooler Master MasterBox NR400 Micro-ATX PC Case Tower, Minimal Design, Airflow Mesh Front Panel, 240mm Water-Cooling Support, Tempered Glass, Single Headset Jack (MCB-NR400-KG5N-S00)

Name: Cooler Master MasterBox NR400 Micro-ATX PC Case Tower, Minimal Design, Airflow Mesh Front Panel, 240mm Water-Cooling Support, Tempered Glass, Single
Brand: Cooler Master
SKU: B07PDT745F
Price: 62.99 USD
Availability: InStock

By Mike Perry, Hardware Editor · Verified 2026-09-15

Mike Perry has researched PC hardware since 2014, tracking 80+ GPU generations, 50+ retro handheld platforms, and 30+ vintage PC configurations. He synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. View full credentials →

$62.99

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View Current Price on Amazon → Compare to similar pc cases

*Price sourced from Amazon.com. Last updated 2026-08-26. Price and availability subject to change.

Bottom line: The Cooler Master MasterBox NR400 Micro-ATX PC Case Tower, Minimal Design, Airflow Mesh Front Panel, 240mm Water-Cooling Support, Tempered Glass, Single Headset Jack (MCB-NR400-KG5N-S00) is a specs-and-price decision rather than a crowd-consensus one in the pc cases category, priced around $62.99. Check the specification table above against one or two close alternatives — on price and spec fit, not on star ratings.

The Master Box NR400 applies optimal cooling and expandability to a minimalist, subtle design. With thermal capability at the forefront of features, the front panel and top panel are designed to signify airflow performance in its purest form. Functionality is blended to a compact design by maximizing use of internal space and implementing subtle design elements. The Master Box NR400 features a tempered glass side panel, fastened by thumbscrews on the rear panel, to keep the surface immaculately flush.

SpecPicks Verdict

SpecPicks scored Cooler Master MasterBox NR400 Micro-ATX PC Case Tower, Minimal… using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis 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 Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Pros & Cons

Pros

✓ Mini Computer Tower
✓ Backed by Cooler Master's warranty and support channels
✓ Ships via Amazon with Prime eligibility and the standard returns policy

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified

Key Features

Mini Computer Tower
Space for a bottom mounted power supply
Four 3.5" bays and four 2.5" bays
Ports: 2 x USB3.2 Gen 1 Type-A
Suitable for Micro ATX and Mini-ITX motherboards

Full Specifications

Brand	Cooler Master
Color	NR400
Ports	2 x USB3.2 Gen 1 Type-A
Fan Size	12 centimeters
Material	Alloy Steel, Plastic, Tempered Glass
Case Type	Mid Tower
Model Name	NR400
Unit Count	1 Count
Model Number	MCB-NR400-KG5N-S00
Compatibility	PC
Cooling Method	Air
Mfr Part Number	MCB-NR400-KG5N-S00
Number of Items	1
Number of Packs	1
Total Usb Ports	4
Antenna Location	Business, Gaming
Compatible Devices	CPU
Enclosure Material	Alloy Steel, Plastic, Tempered Glass
Total USB 2.0 Ports	2
Total USB 3.0 Ports	2

Ready to buy?

Cooler Master MasterBox NR400 Micro-ATX PC Case Tower, Minimal Design, Airflow Mesh Front Panel, 240mm Water-Cooling Support, Tempered Glass, Single Headset Jack (MCB-NR400-KG5N-S00) is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Current Price on Amazon →

*Price sourced from Amazon.com. Last updated 2026-08-26. Price and availability subject to change.