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Cooler Master MicroATX Silencio S400 Case MCS-S400-KN5N-S00

Web ID: 27462

PN MCS-S400-KN5N-S00. The Silencios minimalistic design cloaks its complexity. Design elements fine-tuned in form and function result in minimized noise and efficiently maintained system temperatures. ONLY WHILE STOCKS LAST!
Manufacturer Warranty: 2 Year
Manufacturer PN: MCS-S400-KN5N-S00
GTIN: 884102059834
Manufacturer Website


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 Design Silencio Technology

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

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

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

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.

Versatile HDD Cage

The HDD cage is (re)movable. The cage can be shifted forward to make room for a longer PSU, backwards for additional radiator space, or completely removed if HDD storage is not needed.

Cooling Support

Cooling Support


120 / 140mm x 1 Fans  
120 / 140mm x 2 Fans (remove ODD cage)
120 / 240* Radiator 
*remove ODD cage 

120 / 140mm x 2 Fans
120 / 140 / 240 / 280* Radiator 
*may interfere with HDD mounted below ODD bracket 

120 x 1 Fan
120 x 1 Radiator

Motherboard Support

Motherboard Support

Mini-ITX, Micro-ATX

Model Number
MCS-S400-KN5N-S00 (Steel)

Silencio Series

Mini Tower


Steel, Plastic, Tempered Glass, Sound Dampening Material

Dimensions (L x W x H) 
418mm x 210mm x 408mm (incl. Protrusions), 403.5mm x 210mm x 400mm (excl. Protrusions)

Motherboard Support  
Mini ITX, Micro ATX

Expansion Slots

5.25" Drive Bays              

3.5" Drive Bays

2.5" Drive Bays

I/O Panel           
2x USB 3.2 Gen 1 (formerly USB 3.0), 1x 3.5mm Headset Jack (Audio+Mic), 1x SD card reader

Pre-installed Fans - Front             
1x 120mm (PWM 800-1400 RPM)

Pre-installed Fans - Rear              
1x 120mm (PWM 800-1400 RPM)

Fan Support - Front        
2x 120/140mm

Fan Support - Top           
1x 120/140mm, 2x 120/140mm (remove ODD cage)

Fan Support - Rear         
1x 120mm

Radiator Support - Front              
120mm, 140mm, 240mm, 280mm (remove & reinstall ODD bracket to mount 280mm radiator, may interfere with HDD mounted below ODD bracket)

Radiator Support - Top 
120mm, 240mm (requires removal of ODD cage)

Radiator Support - Rear

Clearance - CPU Cooler
Steel: 167mm, TG: 166mm

Clearance - GFX

Clearance - PSU
325mm (w/o front radiator & HDD cage), 140mm (HDD cage in backmost position)

Cable Routing   

Dust Filters        
Top, Front, Bottom

Power Supply Support  
Bottom Mount, ATX PS2

EAN Code           
4719512087381 (Steel), 4719512087374 (TG)

UPC Code           
884102059834 (Steel), 884102059827 (TG)