The Cooler Master Silencio S400 Case is a silent case that makes no compromises in thermal performance. Sound dampening material minimizes noise from the pre-installed fans, the power supply, all steel panels, the steel front door, and all storage mounting points for 2.5” and 3.5” drives. Two Silencio FP 120mm PWM fans are pre-installed with rubber padding to reduce noise. To connect additional fans, one 4pin 1-to-3 splitter is included. The sound-dampened, steel front door features a reversible mounting system that is capable of opening in two directions.
The Cooler Master Silencio S400 Case is a silent case that makes no compromises in thermal performance. Sound dampening material minimizes noise from the pre-installed fans, the power supply, all steel panels, the steel front door, and all storage mounting points for 2.5” and 3.5” drives. Two Silencio FP 120mm PWM fans are pre-installed with rubber padding to reduce noise. To connect additional fans, one 4pin 1-to-3 splitter is included. The sound-dampened, steel front door features a reversible mounting system that is capable of opening in two directions.
in 3 offers
The lowest price for Cooler Master Silencio S400 Midi Tower Black right now is $115.00 at PLE Computers, compared across 3 retailers.
The all-time low was $99.00 on 21 Sept 2025 — today's price is 16% above the lowest ever. That's a little above the best price we've seen.
Prices last updated 24 July 2026.
Cooler Master Silencio S400 Midi Tower Black
The Cooler Master Silencio S400 Case is a silent case that makes no compromises in thermal performance. Sound dampening material minimizes noise from the pre-installed fans, the power supply, all steel panels, the steel front door, and all storage mounting points for 2.5” and 3.5” drives. Two Silencio FP 120mm PWM fans are pre-installed with rubber padding to reduce noise. To connect additional fans, one 4pin 1-to-3 splitter is included. The sound-dampened, steel front door features a reversible mounting system that is capable of opening in two directions.
The Cooler Master Silencio S400 Case is a silent case that makes no compromises in thermal performance. Sound dampening material minimizes noise from the pre-installed fans, the power supply, all steel panels, the steel front door, and all storage mounting points for 2.5” and 3.5” drives. Two Silencio FP 120mm PWM fans are pre-installed with rubber padding to reduce noise. To connect additional fans, one 4pin 1-to-3 splitter is included. The sound-dampened, steel front door features a reversible mounting system that is capable of opening in two directions.
Last updated at 24/07/2026 01:50:27
Cooler Master Silencio S400 Micro Tower Case (Black)
Delivery between 27 July – 5 Aug $31.26
Cooler Master S400 Silencio mATX Quiet PC Chassis
Delivery $159.50
Cooler Master Case Silencio S400 Black ( MCS-S400-KN5N-S00 ) mITX/mATX, 5.25x1/3.5x4/2.5x4, 4 slots, No PSU, Front 280mm/Top 240mm/Rear 120mm, USB3.2
originally posted on box.co.uk
Pros: The design is very good, but the instructions, and particularly changing the front door from left to right is far too tricky and results in damage to the door inserts. Let's face it - it's good quality, but it's nowhere near European engineering standards!It's easy to use and set up, though with hindsight, requires removal of the two fans in order to get the motherboard into placeDefinitely quiet, but perhaps more a function of quieter fans than anything special about the case itself?Value for money - the overall design and quality of materials is definitely worth the price of this otherwise excellent caseCons: It's heavy. Once PSU, HDD etc. are installed, it's even heavier!Following instructions to swap the door from left to right results in the black paint ... MorePros: The design is very good, but the instructions, and particularly changing the front door from left to right is far too tricky and results in damage to the door inserts. Let's face it - it's good quality, but it's nowhere near European engineering standards!It's easy to use and set up, though with hindsight, requires removal of the two fans in order to get the motherboard into placeDefinitely quiet, but perhaps more a function of quieter fans than anything special about the case itself?Value for money - the overall design and quality of materials is definitely worth the price of this otherwise excellent caseCons: It's heavy. Once PSU, HDD etc. are installed, it's even heavier!Following instructions to swap the door from left to right results in the black paint chipping off the inside of the door. The workmanship simply isn't there to allow for easy reversal. Best to simply reverse the hinges and allow the Logo to swap from bottom to top - will save you the hassle and damageInstalling water-cooling radiator wasn't difficult, but it wasn't easy either. Orientation of the fan and compared to CPU position makes it difficult. Also, be warned - the claim of fitting a dual radiator is not universal. The lower fan slot is partially blocked by the divider between the main space and PSU space. Anything over 8cm in total thickness simply will not fit!You cannot have the fan mesh on the top of the case and the cover in place together - i.e., you cannot leave the mesh in place and only take off the cover when you want to. They have to be "swapped". Surely a basic design oversight?And oh, did I mention it's heavy!? Other than that, pretty good and happy with it.
originally posted on box.co.uk
Pros: Plain, Small, Sound dampening,Interior has enough space for an oversized air cooler and the graphics card could have been twice as longCons: No usb-cThe dust cover for the PSU fan is really flimsy and disappointing when compared to the rear of the case.
originally posted on pccasegear.com
Nice quiet, flexible, mid sized case.Everything is good except these 3 minor issues1) USB front ports are pretty poor quality. They aren't colour coded and tolerances are such that a USB Type A plug can be inserted the wrong way, which should be impossible. (No type-c support on front either)2) The mesh filter on the underside for the PSU is rubbish quality. Has sharp edges which catch of stuff and get bent & damaged.3) The feet on button of case are around 5mm high. Which isn't high enough to allow good airflow for PSU. Especially on carpet, where the case basically sits on the carpet and blocks ventilation. Would be OK on a hard surface,
| General | |
| Form Factor | Tower |
| Max Mainboard Size | Micro ATX |
| Supported Motherboards | microATX, Mini-ATX |
| Internal Bays Qty | 8 |
Cooler Master Silencio S400 Micro Tower Case (Black)
Delivery between 27 July – 5 Aug $31.26
Cooler Master S400 Silencio mATX Quiet PC Chassis
Delivery $159.50
Cooler Master Case Silencio S400 Black ( MCS-S400-KN5N-S00 ) mITX/mATX, 5.25x1/3.5x4/2.5x4, 4 slots, No PSU, Front 280mm/Top 240mm/Rear 120mm, USB3.2
Pros: The design is very good, but the instructions, and particularly changing the front door from left to right is far too tricky and results in damage to the door inserts. Let's face it - it's good quality, but it's nowhere near European engineering standards!It's easy to use and set up, though with hindsight, requires removal of the two fans in order to get the motherboard into placeDefinitely quiet, but perhaps more a function of quieter fans than anything special about the case itself?Value for money - the overall design and quality of materials is definitely worth the price of this otherwise excellent caseCons: It's heavy. Once PSU, HDD etc. are installed, it's even heavier!Following instructions to swap the door from left to right results in the black paint ... MorePros: The design is very good, but the instructions, and particularly changing the front door from left to right is far too tricky and results in damage to the door inserts. Let's face it - it's good quality, but it's nowhere near European engineering standards!It's easy to use and set up, though with hindsight, requires removal of the two fans in order to get the motherboard into placeDefinitely quiet, but perhaps more a function of quieter fans than anything special about the case itself?Value for money - the overall design and quality of materials is definitely worth the price of this otherwise excellent caseCons: It's heavy. Once PSU, HDD etc. are installed, it's even heavier!Following instructions to swap the door from left to right results in the black paint chipping off the inside of the door. The workmanship simply isn't there to allow for easy reversal. Best to simply reverse the hinges and allow the Logo to swap from bottom to top - will save you the hassle and damageInstalling water-cooling radiator wasn't difficult, but it wasn't easy either. Orientation of the fan and compared to CPU position makes it difficult. Also, be warned - the claim of fitting a dual radiator is not universal. The lower fan slot is partially blocked by the divider between the main space and PSU space. Anything over 8cm in total thickness simply will not fit!You cannot have the fan mesh on the top of the case and the cover in place together - i.e., you cannot leave the mesh in place and only take off the cover when you want to. They have to be "swapped". Surely a basic design oversight?And oh, did I mention it's heavy!? Other than that, pretty good and happy with it.
Pros: Plain, Small, Sound dampening,Interior has enough space for an oversized air cooler and the graphics card could have been twice as longCons: No usb-cThe dust cover for the PSU fan is really flimsy and disappointing when compared to the rear of the case.
Nice quiet, flexible, mid sized case.Everything is good except these 3 minor issues1) USB front ports are pretty poor quality. They aren't colour coded and tolerances are such that a USB Type A plug can be inserted the wrong way, which should be impossible. (No type-c support on front either)2) The mesh filter on the underside for the PSU is rubbish quality. Has sharp edges which catch of stuff and get bent & damaged.3) The feet on button of case are around 5mm high. Which isn't high enough to allow good airflow for PSU. Especially on carpet, where the case basically sits on the carpet and blocks ventilation. Would be OK on a hard surface,
| General | |
| Form Factor | Tower |
| Max Mainboard Size | Micro ATX |
| Supported Motherboards | microATX, Mini-ATX |
| Internal Bays Qty | 8 |