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Dynamat Extreme + My case = Quiet [no 56k]

post #1 of 6
Thread Starter 
I have been really annoyed lately by the vibration being induced into my case's panels by the fans and optical drives. It can get rather annoying, especially when the DVD drives spin up.

I remembered that I had a spare sheet of Dynamat Extreme at my parents house from my car audio days so I ran over there and grabbed it. I covered every interior panel in my '04 Dakota with two layers of this stuff (about $500 worth) when I was competing locally, and it made my clunky rattling pickup sound like a Mercedes inside, especially when on the freeway.

There are other less expensive materials available on ebay and from suppliers such as McMaster Carr, but a computer case is such a small amount it really isn't worth it to skimp for the negligable difference in price. I've done A LOT of sound deadening in my day. I've used almost every product on the market. They are all good, and a few are great, but I keep coming back to my old standby Dynamat Extreme. Some of the others are rather hard rubber and have mediocre adhesion, this stuff is an ultra soft butyl rubber/mineral composite, but doesn't produce a rubbery odor like some of the other products. It sticks like crazy, even in hot weather. Additionally it is foil faced which I like... many of the others are not and tend to attact dust with their bare rubber surface.

This stuff is STICKY, I would suggest not doing it on your bed like I did unless you are careful. Also, the foil facing is thick and it WILL cut you, so do not run your fingers down the edges to smooth it down. The easiest way to apply is to start with one corner, and align one edge, then work your way out from there. A small roller is also handy. A razor blade is the easiest way to cut this stuff.





My case and the sheet of Dynamat:






A couple of Inside shots of my case:







I'll start with the side panel, you can see the 2x120mm hole I modded in for when I go to liquid cooling. The 80mm above that is useless and sort of screws up my airflow design, so I'll just cover it up:







One thing to remember that while ideal, it is not totally necessary to cover every square inch of a surface. This stuff absorbs so much vibration energy that even a coulpe of strips across the back of the motherboard plate are more than sufficient.






I cut a strip that runs all the way along the top panel of the case, I had to remove the upper DVD drive and unscrew the PSU to get it in.






My dad gave me a baggie full of little self-adhesive foam squares, I thought they would be useless but they actually worked out considerably well for the front panel. Keep in mind that foam is acoustical insulation, not a vibration reducer. Plastic is already fairly non resonant so I figured these couldn't hurt, but don't go out of your way to do something like this...






Finished. If you look in the top corners and middle edges I stuck a few that extended slightly past the edge to keep the front from vibrating against the case.








My system was already silent with the two Nexus case fans, vf700, and Silverstone cpu fan with frame removed, but this really took it up a notch. When I would tap my case it used to sound like a tin can, now it sounds like a plastic jug full of water. It is almost completely silent (like a ninja )
post #2 of 6
Nice Job

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post #3 of 6
Cool man! , But arent your temps a little higher?
alpha
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post #4 of 6
Thread Starter 
The temps have stayed the same as far as I can tell, I have very good air throughput on my case so the temps are more dependent on the ambient in my room. Steel isn't that great of a thermal conductor either, I may have noticed a difference if this was an aluminum case.
post #5 of 6
Quote:
Originally Posted by iandh View Post
The temps have stayed the same as far as I can tell, I have very good air throughput on my case so the temps are more dependent on the ambient in my room. Steel isn't that great of a thermal conductor either, I may have noticed a difference if this was an aluminum case.
Steel vs Aluminum cases have no noticable impact on temps. Virtually no heat is ever exhausted through the case panelling Feel your side panels and see if you ever find any hotspots. I review compared two identical cases a few years ago and it makes sense.

As for sound dampening, it should not affect temperatures too much. The major reason for a temperature increase is due to reduced airflow and not case insulation.

Since Dynamat is so expensive, you can use other sound dampening materials:
http://www.amazon.com/b/103-3441248-...A2WWWQUWZT1QBQ
http://www.partsexpress.com/webpage....ctGroup_ID=137
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post #6 of 6
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
Steel vs Aluminum cases have no noticable impact on temps. Virtually no heat is ever exhausted through the case panelling Feel your side panels and see if you ever find any hotspots. I review compared two identical cases a few years ago and it makes sense.

As for sound dampening, it should not affect temperatures too much. The major reason for a temperature increase is due to reduced airflow and not case insulation.

Since Dynamat is so expensive, you can use other sound dampening materials:
http://www.amazon.com/b/103-3441248-...A2WWWQUWZT1QBQ
http://www.partsexpress.com/webpage....ctGroup_ID=137

Aluminum vs. steel would have more effect in a case with very poor airflow, we actually purposely use aluminum in some cases at work for electrical enclosures that will either be sealed or have poor airflow.

I've used eDead, and Second skin, some stuff made by cascade, I've even used several of the paint on types such as Stinger roadkill. Dynamat Extreme is still my favorite to work with, but the cost can be too much for those on a budget. The best way to buy it is in bulk packs from ebay. I have a relationship with a local shop that I occasionally still do custom fiberglass and amp racks for so I get it super cheap.

The cheap stuff is definitely effective, and I especially like the foam you posted from PE. I shop there all the time.

The main problem I've seen with the cheaper materials vs. dynamat or second skin is that in hot weather I've seen it literally peel itself right off, or emit fumes for months that make the inside of the car smell like burnt rubber. In a household environtment which is climate controlled neither of those things should be an issue though.
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