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Cooler Master · Mid-Tower · Solid panel

Cooler Master N400

Mini-ITX, Micro-ATX, Standard-ATX · N400

Quality: 64
Quality / price: 82
Max GPU: 320 mm
Amazon: $70

View Cooler Master N400 Gallery in high resolution

Not currently available Updated Jul 28, 2026 Prime FBA

Overall quality64.0

Quality / price82.3

Cooling support10

$70 on Amazon Case table Compare this case

Check this case with a complete fit chainSelect a CPU and motherboard first; the Builder will then verify board size and GPU clearance. Start the compatibility check

Written analysis

Cooler Master N400 at a glance

The Cooler Master N400 is a Mid-Tower chassis with a solid panel side panel profile. Supported boards: Mini-ITX, Micro-ATX, Standard-ATX. Primary materials are listed as steel, plastic, and tempered glass.

Overall quality is 64.0, summing compatibility, cooling, storage, build quality, and connectivity. Max GPU length is 320 mm. Max CPU cooler height is 164 mm. Largest radiator support is listed at 120 mm.

Best fit: General desktop builds where form factor, I/O, and value outweigh extreme clearance.

Cooling and front I/O

Front ports: 2x USB 3.0 (int.), 2x USB 2.0, 1x Audio (supports AC97 / HD Audio), 1x Mic. Dust filters: Yes.

Current value

At $70, quality / price is 82.3. Compare nearby cases of the same form factor below; clearance and panel type can outweigh a small quality gap.

Chassis data

Full specifications

Construction, clearances, cooling, storage, front I/O, and quality metrics in one technical sheet.

General

Manufacturer: Cooler Master
Case: Cooler Master N400
Model: NSE-400-KKN2
Form factor: Mid-Tower
Side panel: Solid panel
Launch price: —
Amazon price: $70
Amazon availability: Not currently available
Price updated: Jul 28, 2026

Construction

Material: steel, plastic, and tempered glass
Color: N400
Side panel detail: steel
Dimensions: 501.4 x 190 x 426 mm
Weight: 5.60 kg
PSU shroud: No
RGB lighting: No

Quality & value

Overall quality: 64.0
Compatibility: 18
Cooling support: 10
Storage score: 14
Build quality: 12
Connectivity: 10
Quality / price: 82.3

Compatibility / clearances

Motherboard sizes: Mini-ITX, Micro-ATX, Standard-ATX
Max GPU length: 320 mm
Max cooler height: 164 mm
Max PSU length: 160 mm
PSU form factor: ATX, SFX
PSU included: No

Cooling

Max radiator: 120 mm
Fan support: Cooling System - Top120mm fan x 2 (optional)Cooling System - Front120mm fan x 2 (one white LED XtraFlo fan installed, one optional) - for KKN1/KWN1, with no PWM / LED XtraFlo - for KKN2/KWN2Cooling System - Rear120mm XtraFlo fan (no PWM / LED) x 1 (installed) *The bundled XtraFlo fans: 3-pinCooling System - Left side120/140mm fan x 1 (optional)Cooling System - Right side120mm fan x 2 (optional)
Radiator support: Rear120mm
Pre-installed fans: Not specified
Dust filters: Yes

Storage & I/O

Drive bays: 3.5" Drive Bays1 (exposed), 7 (hidden)2.5" Drive Bays3 (hidden)
Expansion slots: 7
Front ports: 2x USB 3.0 (int.), 2x USB 2.0, 1x Audio (supports AC97 / HD Audio), 1x Mic
USB-C: Not listed

Additional information

Also listed as: N400

Amazon

Price history

Nearby quality

Similar cases

Cases close to Cooler Master N400 on overall quality. Open the case table to sort, filter, and compare side by side.

Fractal Design Fractal Design Focus G Mid-Tower · Tempered glass

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Cooler Master Cooler Master N400 This case

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Corsair CORSAIR iCUE 4000X RGB Mid-Tower · Tempered glass

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Corsair Corsair 3000D AIRFLOW Mid-Tower · Tempered glass

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Thermaltake Thermaltake Versa H18 Tempered Glass Mid-Tower · Tempered glass

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NZXT NZXT H6 Flow Mid-Tower · Tempered glass

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NZXT NZXT H5 Flow Mid-Tower · Tempered glass

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Corsair CORSAIR 3500X ARGB Mid-Tower · Tempered glass

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MONTECH Montech X3 Mesh Mid-Tower · Tempered glass

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Compare these in the case table

Discussion

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Vendor copy

Amazon listing details

Marketplace feature text kept for reference. Structured specifications above are the source for scores and comparisons.

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

Two USB 3.0 SuperSpeed ports in front