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 Post subject: DIY "Silent" PC Case
PostPosted: Sun Jan 06, 2019 7:54 am 
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Joined: Sat May 20, 2017 7:47 am
Posts: 188
Location: Surfleet, UK
Hi guys,

I'm upgrading my PC at the moment ready for the studio and need to get a new case (New form factor motherboard). But I thought to myself... Why not use some of the knowledge I've gained in studio construction to build a PC case!

So that's my plan. I want to limit noise from internal fans and also make it cheap(ish).

My new PC is made from refurbished and retired server components (Good deals!).

Supermicro R9DRI-F, E-ATX server board
2 x Intel Xeon E5-2667 2.9GHz (3.5GHz Turbo) 6-Core CPU
4 x 4GB DDR3 1600MHz RAM
AMD RX 580 4GB GPU (Main)
Geforce 650ti Boost (Additional - for use with virtual machine)

The PC Case design is built around the concept of maximum airflow via high-flow case fans and built-in baffle box style silencers to reduce fan noise.
There will be positive pressure in the case with cool air coming in the from the front and hot air expelled from the rear of the case.
The silencer runs will be lined with 6mm acoustic foam and have dust filters on each one.

The rear of the motherboard connections will not be exposed (as it is in every other PC case), but contained in the case and wires from the necessary ports run into a sealed box, attaching to a Euro Module wall plate with replaceable insert modules. The power cable will run through a "brush" module in the rear panel and remain plugged in at all times. The DVD drive and front panel wires will run through the dividing wall and all holes caulked.

I plan to build the whole thing out of 9mm MDF (I have some left over from my silencers).

The side panel will be removable (with rubber seals) and attached by screws into threaded insert nuts.

Here's my design so far.

Let me know what you think!

Dan

Attachment:
PC case design.png

Attachment:
PC case design back.png

Attachment:
PC case design euro module plate.png

Attachment:
PC case design front.png

Attachment:
PC case design side back.png

Attachment:
PC case design vents front.png

Attachment:
PC case design vents.png


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 Post subject: Re: DIY "Silent" PC Case
PostPosted: Sun Jan 06, 2019 12:43 pm 
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Joined: Wed Feb 01, 2017 6:03 pm
Posts: 636
Location: St. Albert, Alberta, Canada
Very cool!

If you took measurements of the noise from the fans, you should be able to build and implement a tuned stub on your silencers!

Greg

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 Post subject: Re: DIY "Silent" PC Case
PostPosted: Mon Jan 07, 2019 12:13 am 
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Joined: Sat May 20, 2017 7:47 am
Posts: 188
Location: Surfleet, UK
Hi Greg,

You mean like a helmholtz absorber with an opening sized for the frequency? Would be cool! Might struggle to fit it in though.

Dan


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 Post subject: Re: DIY "Silent" PC Case
PostPosted: Sat Jan 12, 2019 11:25 am 
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Joined: Wed Feb 01, 2017 6:03 pm
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Location: St. Albert, Alberta, Canada
Like this:
Attachment:
Tuned Stub.png

Greg


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 Post subject: Re: DIY "Silent" PC Case
PostPosted: Sun Jan 13, 2019 3:41 am 
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Posts: 188
Location: Surfleet, UK
That's a really good idea!
I would tune it for the frequency produced when all the fans are running at full speed.

I think to get this right though I'd need some way to adjust it once fitted to dial in to exact the right frequency. I saw some do this with adjustable membrane traps to perfectly hit the right tones.

I'll investigate. If you have any ideas for adjustable tuned stubs that'll be great.
Dan


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 Post subject: Re: DIY "Silent" PC Case
PostPosted: Sun Jan 13, 2019 4:08 am 
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Joined: Wed Feb 01, 2017 6:03 pm
Posts: 636
Location: St. Albert, Alberta, Canada
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If you have any ideas for adjustable tuned stubs that'll be great.

You could make a plunger type stub in which you could add a bolt at the top of the plunger you could screw in/out to raise/lower the plunger which would allow you to change the area in the stub, ultimately tuning the stub. The biggest issue to overcome would be maintaining the seal during tuning. Once you got the size right, you could permanently mount the top and seal it all up. Something to think about for sure.

Greg

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