Cooler Master Silencio S400 Mini Tower Case fits mini ITX with Tempered Glass Black (MCS-S400-KG5N-S00)

Stock Status: 1-3 days
Key Specifications
  • fits Mini ITX motherboards

  • Max CPU cooler height: 166mm

  • 4 x3.5" / 4 x 2.5"

  • up to 280 mm radiator

SKU:#046150 Warranty2 Years by Cooler Master Product No.:CAS-CMS-MCS400KG5 Short link: See specifications from the manufacturer

Silencio Design
The Silencio’s minimalistic design cloaks its complexity. Design elements fine-tuned in form and function result in minimized noise and efficiently maintained system temperatures.

Silencio Technology
Behind the outer panels are pieces of meticulously placed sound dampening material. The development of the Silencio was driven by Sorama’s Cam64—this allowed for the entire sound spectrum to be visually analyzed by source, resonance pattern, and frequency.

With the identification of peaks within certain frequency ranges, fine-tuning the Silencio for the dispersion of resonance was made possible, reducing the prominence of noise generated by system components. Every detail in design optimized the Silencio for thermal efficiency and silence, from the type of material used to its placement.

Sound Dampening Material
The Silencio utilizes a combination of sound dampening materials, from thick soft foam to heavy mass-loaded vinyl, to precisely counter prominent frequencies.

Seamless Tempered Glass or Sound-Dampened Steel
Available with seamless tempered glass or a sound-dampened steel side panel, systems can be built for show or for stealth with the Silencio.

For an even higher demand for ventilation, the top panel’s Sound Dampening Cover can be removed for unrestricted ventilation. An optional dust filter for the top panel ventilation is included, allowing the top panel and front panel work in conjunction to cool the system.

The front panel features a recurved vent, directing air in through the front bezel. The curve points downward, taking air in from the bottom, and straightens out to direct air in from either side of the steel front door.

Reversible Steel Door
The steel front door features a reversible mounting system, capable of opening in either direction. To prevent vibrations, a softer, thicker material spans the steel structure in conjunction with a hinge system of magnets and rubber stompers.

Silencio Fans
Two Silencio FP 120mm PWM fans are pre-installed with rubber padding to reduce noise, featuring specially designed blades that allow both quiet operation and high air pressure.


2 Years by Cooler Master


Form factorMini Tower
MaterialPlastic,Steel,Tempered glass
Product colourBlack
Supported motherboard form factorsMicro ATX,Mini-ITX
Number of 3.5" bays4
Number of 5.25" bays1
Side windowY
Number of 2.5" bays4
Number of expansion slots4
Anti-dust filterY
Maximum CPU cooler height16.6 cm
Maximum graphics card length31.9 cm
Maximum PSU length32.5 cm

Power supply

Power supply includedN
Power supply locationBottom
Supported power supply form factorsATX

Ports & interfaces

USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity2
Audio inputY
Audio outputY


Front fans installed1x 120 mm
Number of front fans supported (max)2
Front fans diameters supported120,140 mm
Rear fans installed1x 120 mm
Number of rear fans supported (max)1
Rear fans diameters supported120 mm
Number of top fans supported (max)2
Top fans diameters supported120,140 mm
Fan speed800 - 1400 RPM
Front radiator fan sizes supported120,140,240,280 mm
Rear radiator fan sizes supported120 mm
Top radiator fan sizes supported120,240 mm


Supported HDD sizes2.5,3.5,5.25"
Compatible memory cardsMMC,SD

Weight & dimensions

Width210 mm
Depth418 mm
Height408 mm
Weight7.24 kg

Packaging data

Package width278 mm
Package depth480 mm
Package height480 mm
Package weight8.31 kg

Other features

Volume33.9 L