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pudgy-duck
01-30-02, 12:23 AM
Whether you have a HSF or water cooling, either way there are still fans in the case and PSU. I wanted to reduce the fan noise coming from my case. Can't get things too quiet I say.

Went down to the carpet store and bought a piece of 1/4 inch thick carpet pad that was 2 feet by 6 feet. The kind that is a bunch of recycled foam chunks glued together. Cost, not quite $5. Also picked up a roll of double stick carpet tape. Cost, $3 and change.

I have an INWIN Q500 full tower case. The kind where both sides and the top are removeable panels, and the MoBo is mounted on a removeable drawer (for lack of a better word). I cut out pieces of padding and used the double stick tape to attach them to the inside of the sides, top, and bottom of the case. Can't do much with the front or back of the case. The padding is inside the case, and cannot be seen.

This really reduced the fan noise. The howling is gone. From the front, about the only thing I can hear now is the sound of moving air. From the back, the only fan noise I hear is the whine from the PSU fan. I am going to order a Panaflo and replace it. The foam padding absorbs the noise and prevents the case from acting like a resonance chamber. I had the case buttoned up and the computer running. I then removed the left side panel while the computer was still running. The noise level increased noticeably, so I know it is helping enough to make it worth the 1/2 hr to 45 min. I spent installing it. Of course, this is not for everyone, e.g. someone with a window in their case. But if you want noticeable noise reduction for about $10 and 45 min of time, give it a try and post how it worked for you.

I use the classic S shaped air flow. All air enters in the bottom front of the case, and flows to the upper back of the case. I had the side vents already taped off. So, adding the foam padding did not change any of my temps.

Pudge

P.S. I am fairly new to this forum, and I can't harldy believe I am the first to think of this. So if this idea has already been hashed through earlier, I apologize for reposting it.

Neco
01-30-02, 05:38 AM
Did you just do the side & top panels or the whole case ?

that's definately interesting. as for people with windows..

They can learn to measure and cut :D


This is neato info and super cheap thanks for posting it.

demon-eater
01-30-02, 07:33 AM
i did that about 6 months ago with my case.......

it does actually cut down on the noise too

Neco
01-30-02, 11:44 AM
How about case temps ?

do they go up ? down ? stay the same ?

soil
01-30-02, 11:55 AM
are there lint (from the carpet) stick with the CPU heatsink, PSU or anywhere inside the case?

would wool carpet be less inflamable than polyester?

well I really mean it as I have been thinking about this for quite a while after I has sound-deadener sparyed to the bottom of my car...and yes, how about sparying sound-dampener for car on the inner casing of the PC? Any fire hazard?

but seems that most of the noise came from the exhaust of the PSU...

pudgy-duck
01-30-02, 01:13 PM
Neco;

A case has six panels. Two sides, top, bottom, front and back.
So far, I have put the padding on four panels. The two sides, top, and bottom. Did not think it wise to mess with the front. and the back is all connectors, etc, not much you can do there.

Case temps, cpu temp, etc stayed the same for me. As they should if you have good air circulatioin in the case. People think carpet padding will insulate their case and make it hotter. They only way insulating the metal sides of the case would contribute to a hotter case, would be by cutting down on heat conduction through the metal sides. For conduction to take place through the metal sides, there would have to be a temp differential between the sides. i,e, much hotter inside the case than out. If you have decent air circulation through the case, and inside case temps are only a few degress above ambient room temp, then conduction will be a negligible part of your case cooling, and adding the carpet padding will not adversly affect your temps. If a person has case temps so high that conduction through the metal case sides is a contributing factor in cooling, then they need to address that problem before they worry about noise.

Soil;

Quote:
would wool carpet be less inflamable than polyester?

I am NOT using carpet. I am using the foam padding that they install under the carpet. Foam does not have fibers like carpet and lint, etc is not a problem. As for flammability, the padding should be cut and held in place by the double sticky tape so that no part of the foam padding is touching any part of the MoBo, fans, Power supply unit, or anything electrical. You are just adding a layer of foam to the sides, top, and bottom. The foam should be trimmed so that it isn't touching anything but the surface it is attached to.

As to sound deadeners for cars. If it is sprayed on, most of the products I am familiar with would have an obnoxious smell for quite some time. The fans in the case would just circulate that smell in your room. If you go this route, be sure the product doesn't omit noxious fumes while curing.

Yes PSU manufacturers are concerned more about price than noise, so they use cheap fans. The only thing you can do there is buy a different fan that is known for how quiet it is, like a panaflo or a pabst, and swap out the PSU fan. If you are experienced with electrical wiring, this is no problem. If you are not experienced in electrical wiring, get someone to help you with that.

Pudge

Owenator
01-30-02, 01:45 PM
I put the car dynamat stuff in my case and it did reduce noise but it also smelled for awhile. I am used to weird smells from all my work with cars and industrial stuff ( and my kids :) but I like the idea of the foam. dynamat weighs A LOT and my case and the side panels always seem too heavy. I will have to go get some of this foam atn try it out! If you want a source for cheap Panaflo L 80mm fans check out this link.

http://www.allelectronics.com/cgi-bin/category.cgi?category=220&type=store

Only $4.50/ea. I have eight in my case 4 inlet 4 outlet, and they are really very quiet, 24 CFM, 21 dBA. They have grills too for $1.25.

O

soil
01-30-02, 01:59 PM
Originally posted by pudgy-duck
Neco;
If you are experienced with electrical wiring, this is no problem. If you are not experienced in electrical wiring, get someone to help you with that.

Pudge

Yes I did switch the fan inside my Sparkle400W, the wires were plugged rather than soldered...I also cut off the case stamping...but in my current PSU it gets a paper warranty label sealing the PSU...anyway...thanks for the warning of the spray smell...I almost try to get one and start spraying... :rolleyes: