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Cooler Master Silencio S400 Micro-ATX Tower with Sound-Dampening Material, Sound-Dampened Solid Steel Side Panel, Reversible Front Panel, SD Card Reader, and 2 x 120mm PWM Silencio FP Fans

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In stock.
Ships from Canada.
Most customers receive within 4-8 days.
  • Steel, Plastic, Sound Dampening Material Micro ATX Mini Tower
  • 2 x USB 3.2 Gen 1 (formerly USB 3.0), 1 x 3.5mm Headset Jack (Audio+Mic), 1x SD card reader Front Ports
  • 1 External 5.25" Drive Bays
  • 4 Internal 3.5" Drive Bays
Cooler Master Silencio S400 Mirco ATX case angled to right


Cooler Master's Silencio S400 is a masterpiece crafted to deliver the best in design, quietness and cooling performance. The minimalistic look makes a unique statement wherever you place it. Silencio Technology integrates sound dampening material to effectively reduce vibration and counter prominent frequencies, so your system will run extremely quiet. In addition to two pre-installed Silencio FP 120mm PWM fans, it offers support for radiators and more fans to keep your powerful PC cool even at full load.

Silencio S600 placed near a monitor on the wooden desk


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.

a nosie detection device placed near Silencio S600


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.

design detail of sound dampening materials


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

design detail of ventilation holes



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 to work in conjunction to cool the system.

design detail of front panel



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.

design detail of steel front 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.

design detail of Silencio FP 120mm PWM fan


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.

design detail of 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.


All images are for illustration only. Unless specially stated, components are sold separately.

Warranty & Returns

Warranty, Returns, And Additional Information


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details

Return Policies