Coolermaster Silencio S400 Micro-ATX Solid Panel Tower Case (MCS-S400-KN5N-S00)

Item # COOMCSS400KN5NS00 (Part # MCS-S400-KN5N-S00)
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Item Description:
  • Silencio Design
  • Silencio Technology
  • Sound Dampening Material
  • Seamless Tempered Glass or Sound-Dampened Steel
  • Top & Front Ventilation
  • Reversible Steel Door
  • Cooler Master Silencio S400 Micro-ATX Solid Panel Tower Case (MCS-S400-KN5N-S00)

    • The Silencio is a silent case that makes no compromises in thermal performance. 

    • Sound dampening material surrounds the system build, rubber padding cushions all included fans, and a removable cover shields noise that escapes from the top panel. For optimal noise reduction, the                steel side panel features sound dampening material.

    • For demanding systems, The top panel’s sound dampening cover can be removed for increased ventilation. 

    • Paired with the front panel’s ventilation, directionally taking in air through the mesh, silence can be accomplished without sacrifice. 

    • The subtle ventilation takes in air from three sides of the sound-dampened front door, with the mesh filter aimed toward the bottom for an efficient intake of air.

    • Motherboard Supported - 15.50 lb - 5 x Fan(s) Supported - 1 x External 5.25" Bay - 4 x Internal 3.5" Bay - 4 x Internal 2.5" Bay - 4x Slot(s) - 2 x USB(s) - 1 x Audio In - 1 x Audio Out.



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

    Series: Silencio Series

    Size: Mini Tower

    Color(s) : Steel

    Materials: 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: 4

    5.25" Drive Bays: 1

    3.5" Drive Bays: 4

    2.5" Drive Bays: 4

    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: 120mm

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

    Clearance – GFX: 319mm

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

    Cable Routing: 20mm

    Dust Filters: Top, Front, Bottom

    Power Supply Support: Bottom Mount, ATX PS2



              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.


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


    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.


    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.


    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.


     5.25” ODD x 1 (ODD version)

     3.5” HDD x 4

     2.5” SSD x 4



    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

    S400 Micro-ATX Mini Tower Case
    Product Manual
    Product Sheet
    Includes Cooler Master USA Authorized Dealer Warranty
    This Kit Includes: