Cooler Master Silencio S400 Silent MATX Mini Tower Case for mATX /ITX ,CPU Cooler Supports Upto 166mm, GPU Supports Upto 319mm, 4 X PCI Slots 2XUSB 3.0,Sound-Dampened Side Panel, Sound-dampened Steel Front Door, Removable Sound Dampening T

I bought this case to transplant an old desktop PC during a NAS conversion, and there is plenty of room for such a task. Plus the sound dampening really reduces the hum from mechanical hard drives. If you want a minimalist chassis with none of the RBG nonsense, this is the one to get.
The only downside with this case is the power and reset buttons are on the top of the case, and are a bit prone to accidental pressing. I bought this case to transplant an old desktop PC during a NAS conversion, and there is plenty of room for such a task. Plus the sound dampening really reduces the hum from mechanical hard drives. If you want a minimalist chassis with none of the RBG nonsense, this is the one to get.
The only downside with this case is the power and reset buttons are on the top of the case, and are a bit prone to accidental pressing.

Great little case, let's me pack a lot of punch into a tiny package. If you are using 3.5' hard drives be careful with your power supply and/or radiators as it can get very cramped very quickly. Included fans are dead silent, had to check they were running a few times Great little case, let's me pack a lot of punch into a tiny package. If you are using 3.5' hard drives be careful with your power supply and/or radiators as it can get very cramped very quickly. Included fans are dead silent, had to check they were running a few times

Was a bit bigger than i was expecting (it might as well be a mid tower) and is actually jet black in colour rather than grey (which is sort of how it looks in the photos).
Build quality seems really good and can confirm that it is quiet, all side panels are coated with sound deadening material from the inside.
The price for being so quiet is that it can get a bit warm compared to a better ventilated case, definitely get another fan so you can have two on the front.

Definitely don't put this thing on carpet as the only intake for the power supply is from the bottom! Was a bit bigger than i was expecting (it might as well be a mid tower) and is actually jet black in colour rather than grey (which is sort of how it looks in the photos).
Build quality seems really good and can confirm that it is quiet, all side panels are coated with sound deadening material from the inside.
The price for being so quiet is that it can get a bit warm compared to a better ventilated case, definitely get another fan so you can have two on the front.

Definitely don't put this thing on carpet as the only intake for the power supply is from the bottom!

Very happy with this case, big improvement in quality over my last pc case without a big increase in price. Nice and quiet fans. No complaints Very happy with this case, big improvement in quality over my last pc case without a big increase in price. Nice and quiet fans. No complaints

There are some comments about the price, it seems a very good price point for the build quality.

This is a solid case, and much better than any thing I've purchased at this price point. No noise, quite fans and good options. I've even placed a SAS backplane for 8 * 2.5" drives as there is plenty of room There are some comments about the price, it seems a very good price point for the build quality.

This is a solid case, and much better than any thing I've purchased at this price point. No noise, quite fans and good options. I've even placed a SAS backplane for 8 * 2.5" drives as there is plenty of room

A bit more expensive than a normal ITX case. But it is worth the money, the build and material are very solid, and you can see the difference with a touch.
Be aware PB Tech sold the steel panel version only. There is no glass panel included in the box. A bit more expensive than a normal ITX case. But it is worth the money, the build and material are very solid, and you can see the difference with a touch.
Be aware PB Tech sold the steel panel version only. There is no glass panel included in the box.

This is a great case for a silent build. Do not underestimate the benefit of the noise cancelling lining This is a great case for a silent build. Do not underestimate the benefit of the noise cancelling lining

Great case for its purpose.. For a non RGB setup... Very quiet and solid chassis... Looks very elegant.
Good airflow Great case for its purpose.. For a non RGB setup... Very quiet and solid chassis... Looks very elegant.
Good airflow

This case is solid steel - so no risk of breaking any glass side-panels, and no RGB nonsense. It runs quietly - which also means you can expect it to run 3-4 degrees hotter than other cases. The case has room for an extra fan at the front which I got added. With a Noctua front fan, and Noctua CPU cooler I'm idling around 28-32 degrees. It goes up to 60 with occasional spikes to 70 degrees when playing 4k games on ultra settings. It's been great so far.

FYI I believe there is a minor mistake or two in the description - it gives 2 model numbers in 2 different places - one for the glass panel edition, and one for the steel edition. This is th...view more This case is solid steel - so no risk of breaking any glass side-panels, and no RGB nonsense. It runs quietly - which also means you can expect it to run 3-4 degrees hotter than other cases. The case has room for an extra fan at the front which I got added. With a Noctua front fan, and Noctua CPU cooler I'm idling around 28-32 degrees. It goes up to 60 with occasional spikes to 70 degrees when playing 4k games on ultra settings. It's been great so far.

FYI I believe there is a minor mistake or two in the description - it gives 2 model numbers in 2 different places - one for the glass panel edition, and one for the steel edition. This is the one with the steel side-panel.

I'm using this by my TV for a plex server and gaming PC. It hides well - which is what I wanted for it. I've fit a i7 13700 and rtx4070 in here. Had to use the single fan Noctua CPU fan as the double Noctua fan wouldn't fit properly - which is still keeping cool temperatures so I've got no problems.

As others have mentioned, the feet are really low, and it has an intake from the bottom so you'll want to put it on something solid so it doesn't suck in all your dust. Apparently you should put all PCs that suck air from the bottom on something solid though as either way it'll be sucking in too much dust.

Case is actually black.
Perfect for my Media PC as it still can take x4 3.5" HDD's! That's even a harder thing to find in regular ATX cases these days.
It's a good size (smaller but, not too small) if you have a bit of hardware you still need to fit in.
This case with Be Quiet! fans in it is near silent, if I listen very closely you can only hear the faint arm movements of the HDD's Case is actually black.
Perfect for my Media PC as it still can take x4 3.5" HDD's! That's even a harder thing to find in regular ATX cases these days.
It's a good size (smaller but, not too small) if you have a bit of hardware you still need to fit in.
This case with Be Quiet! fans in it is near silent, if I listen very closely you can only hear the faint arm movements of the HDD's

Can't complain, does what's advertised Can't complain, does what's advertised

This case all feels a bit retro, but with hints of more modern features. It has a USB2 full size SD card reader, a 5 1/4" bay, a reset button and no USB-C ports. But the PSU is in the bottom and the switches/buttons are on the top like a more modern case.

The side panels slide on and off, and there is no window, also old school. Both side panels have a thin sound deadening material on them and they are heavy steel parts. The PSU can only be removed from one side. The front panel hinges open (can be set to open either left or right), and there is a removable dust filter below the 5 1/4" bay. The front 'door' is lined with sound deadening f...view more This case all feels a bit retro, but with hints of more modern features. It has a USB2 full size SD card reader, a 5 1/4" bay, a reset button and no USB-C ports. But the PSU is in the bottom and the switches/buttons are on the top like a more modern case.

The side panels slide on and off, and there is no window, also old school. Both side panels have a thin sound deadening material on them and they are heavy steel parts. The PSU can only be removed from one side. The front panel hinges open (can be set to open either left or right), and there is a removable dust filter below the 5 1/4" bay. The front 'door' is lined with sound deadening foam, but leaves a 10mmx250mm gap along both sides, so the only airflow restriction comes from the the filter. The filter and foam are OK at reducing noise from the front fans.

The top mount can take fans or a radiator, but there's less than 50mm of space so the combined thickness would need to be carefully considered. Around 300mm of length is available, if the 5 1/4" bay bracket is removed (about 200 with it left in). The top cable can either have a filter or a sound-deadened panel fitted, these are both included and sit in place with magnets.

Two 140mm fans can go in the front, and a 120mm in the rear. Two 120s are included, these are good quality PWM models that run silent at full speed. A 3-way splitter cable is included. There are rubber mounts for three fixed mount HDD/SSDs, I believe there are four locations for these. There are two 3 1/2" drive bays in the bottom, with slide in mounts included for these.

Overall the case feels kinda large for a miniATX. At 400mm x 400mm, it can take a full length graphics card (mine is 310mm and just fits with the fans 'inside' the front panel). A miniATX mobo sits against the bottom and has 50mm clearance at the top of fans/radiator. The depth of the case is 210mm and can fit a large CPU cooler (mine is 160mm and it just fits). Full size PSU sits in the bottom with a filter over the intake. The perforated area below the PSU fan is only 120x90mm, but there are four dimples pressed into the bottom of the case to hold the PSU up from sitting flat against the bottom panel. This will allow extra airflow around the PSU and no restrictions into the intake fan. The feet of the case are only 5mm high so there is very little clearance under the ase. These are basic cylindrical feet held on with a single screw, so fitting taller feet would be easy and might be a good idea, certainly if you need to place this on carpet. 300mm diameter x 15mm (or more, maybe 20/25mm if on carpet) round aluminum feet would be about right.

Cable management is provided with cutouts and hoops to fix cables, but only zipties are provided. The loops are over 10mm wide so velcro straps could be added. There are 8 loops around the edges of the backplate by my count. This is all very adequate and you will be able to tidy up the cabling if that is your thing.

The build quality of the case is fine. It is steel and screwed/riveted together, painted in a flat black. The front panel where the filter mounts is plastic, but the colour and texture match the steel finish, except on the sides where two gloss finished areas border the 10mm x 250mm cut outs mentioned about - it looks good. The front door is steel, around 10mm deep and full of foam. The flat black finish does a good job of hiding fingerprints and will be a tough material.

In terms of any defects, the only one I can spot is that the captive thumbscrews on one side panel were slightly bent, however they still function normally. The case is shipped packed in thick polystyrene and was delivered without visible damage so it is difficult to see how this could have happened in transit.

In summary this case suited my needs perfectly. Plain, quiet, good airflow, can fit full size coolers and cards, has good cable management options, while still being miniATX in size (technically). At this price point there are many options for more showy cases with RGB and glass panels. But if you're wanting a non-descript and quiet solution for your server, workstation, NAS or gaming rig this case can offer you that.