Cooler Master

Cooler Master N400 - Mid Tower Computer Case with Fully Meshed Front Panel (NSE-400-KKN2)

Name: Cooler Master N400 - Mid Tower Computer Case with Fully Meshed Front Panel (NSE-400-KKN2)
Brand: Cooler Master
SKU: B00DKXXBU0

Status: Cooler Master N400 - Mid Tower Computer Case…: Unavailable on Amazon as of 2026-10-04 22:27 UTC. SpecPicks has no in-stock listing with matching specs on file; the search below lists current offers. eBay sellers may still list this model new or used.

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Bottom line: The Cooler Master N400: Fully meshed front panel built for unrestricted airflow; main trade-off: only 2 of the 8 supported fans are included, so a full airflow setup costs extra.

Unavailable on Amazon as of 2026-10-04 22:27 UTC

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By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-04

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. About the author →

Pros & Cons

Pros

✓ Fully meshed front panel built for unrestricted airflow
✓ Fits a 240 mm radiator on the side or top, plus a 120 mm radiator at the rear
✓ Two Cooler Master XtraFlo 120 mm fans included, with room for up to 8 fans
✓ Three dust filters: top, right side panel, and PSU intake
✓ Two front USB 3.0 SuperSpeed ports; mounts for up to three SSDs, two on a tool-less bracket

Cons

✗ Only 2 of the 8 supported fans are included, so a full airflow setup costs extra
✗ Included XtraFlo fans are non-LED, so they add no lighting to RGB builds
✗ Rear radiator mount is limited to 120 mm
✗ Front I/O lists USB 3.0 only, with no USB-C port mentioned

Manufacturer description

The Cooler Master N400 (NSE-400-KKN2) is a mid tower computer case built around one priority: airflow. Its fully meshed front panel lets cool air flow straight into the chassis. Two Cooler Master XtraFlo 120 mm fans come pre-installed and are arranged for optimum airflow out of the box. If you plan to water cool, the N400 gives you room to do it. You can mount a 240 mm radiator or two 120 mm fans on the right side or top of the case. The rear takes a 120 mm radiator. For air-cooled builds, the case supports up to eight fans in total. The case also suits SSD-first builds. Two drives fit on…

SpecPicks Verdict

SpecPicks scored Cooler Master N400 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.

Frequently Asked Questions

What size radiator fits in the Cooler Master N400?

The N400 supports a 240 mm radiator on the right side or top of the case and a 120 mm radiator at the rear. Cooler Master lists 240 mm as the maximum radiator size.

How many fans come with the N400, and how many can it hold?

It ships with two non-LED Cooler Master XtraFlo 120 mm fans, arranged for optimum airflow. The case supports up to 8 fans in total.

How many SSDs can I install in the Cooler Master N400?

Up to three. Two mount on the tool-less 2.5-inch bracket, and one mounts at the bottom of the HDD cage.

Does the N400 have dust filters?

Yes. It has three dust filters, covering the top, the right side panel, and the power supply intake.

What front ports does the Cooler Master N400 have, and what is the warranty?

The front panel has two USB 3.0 SuperSpeed ports. Check the product listing or Cooler Master's support site for current warranty terms.

Key Features

Fully meshed front panel for superior airflow
Supports a 240 mm water cooling radiator or two 120 mm fans on the right side or top of case
Supports up to three SSDs -two on the tool-less 2.5 Inch bracket and one at the bottom of the HDD cage
Supports a 120 mm water cooling radiator at the rear
Includes two Cooler Master XtraFlo 120 mm fans (non-LED) arranged for optimum airflow with support for up to 8 fans total
Three dust filters (top, right side panel, and power supply) for easy maintenance

Full Specifications

Brand	Cooler Master
Color	N400
Fan Size	12 centimeters
Material	Metal
Case Type	Mid Tower
Model Name	NSE-400-KKN2
Unit Count	1 Count
Connectivity	USB
Model Number	NSE-400-KKN2
Built-In Media	case
Cooling Method	Air
Number of Fans	3, 8
Mfr Part Number	NSE-400-KKN2
Number of Items	1
Total Usb Ports	2
Antenna Location	Business
Compatible Devices	NVIDIA GTX 690, AMD HD 7990
Enclosure Material	Metal
Total USB 3.0 Ports	2
Warranty Description	2 years

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