"Noisless" power supply???

[deltaf508]

I have a friend that want's to know if there is a "noiseless" power supply available anywhere? I have never heard of a power supply that puts off zero noise, due to the fans and stuff. But I told him I would look around and see what I could find. Any Ideas for me....

Thanks,

Gary

[NDC]

Look here:
http://www.zalman.co.kr/english/product/cnpspower2.htm

[Szech]

Enermax ( www.enermax.com.tw (http://www.enermax.com.tw) ) also makes a line of power supplies dubbed the "whisper" series. Very quiet from what I've heard.

[Axel]

What's the goal here?

Is it just noise reduction?

Buy extension cables for the keyboard, mouse, and monitor cables - Put the CPU in another room.

One thing you totally want to avoid - do NOT enclose the CPU in anything that isn't well ventilated. I've pulled many a dead system out of a narrow desk "slot" because the user didn't "want to see or hear the cpu" - well - once it's dead - that will no longer be a problem.....

[Axel]

one other point - a really good power supply can run you about $250.00 US, three extension cables might run you $90.00 if you don't feel a deep seated need for solid gold connectors.

[nickp]

My box made by Hansan System is equiped with a 300W power supply made by MOROTEC.You have to put your ear against the box to hear the fan;it's so quiet.So,just check MOROTEC.COM to go to the site.

[nickp]

Sorry,yhe name of the company is MORETEC instead of morotec.
nickp

[krusty the klown]

Enermax PSUs are extremely quiet!! Excellent piece of kit http://www.sysopt.com/forum/smile.gif

Alternatively, you could go for the ultimate in noiselessness ( http://www.sysopt.com/forum/wink.gif)
http://www.koolance.com

These cases have a watercooled PSU

[Bsdboy]

I have an Enermax,it's pretty quiet but definitely not silent.

Bsdboy

[bhess]

I have an Enermax and am not impressed with it. The antec I took out is quieter. I thought that the fan is supposed to change RPM but mine does not. It has two fans one in the back and one inside at the bottom. Oerhaps the one inside changes RPM but the one outside is still noisy.

[Szech]

This site suggests that a power supply doesn't need a fan:
http://home.swipnet.se/tr/silence.html

The power supply of modern PCs accounts for some of the heat generated, and when built in the system unit needs a fan. But maybe it doesn't have to be this way: It has been said that the power supply can be separated from the system unit, and connected to it with an electric cord. Then it can be sufficiently cooled just by convection, making the fan unnecessary. People criticizing this approach has said that the fan in the power supply is more a solution for the total demands for cooling of the system unit, than just for cooling of the power supply itself, and that leaking currents will cause problems using long cords.

So perhaps if you have good case cooling, you can leave the power supply out of the box.

[Szech]

The Mac Cube's processor runs relatively cooler, so it does not need a fan. The macs here on my campus have those translucent cases, and I can see that most of the heatsinks are positioned vertically. Horizontally mounted heatsinks would block air convections, and the radiated heat would not escape as quickly. This factor, along with cooler running components, I am assuming, allows for passive cooling.

I am pretty sure you could passively cool the lower speed FC-PGA Celerons. They generate less than 20 watts of heat.

[Virtual Infinity]

Rather than buying a whole new PSU, would it not be cheaper to replace the existing fan with a quieter model?

[Szech]

Yes, but you also have to keep in mind that quieter fans often are lower performance. Not that the power supply fan is a Delta black label, but you would have to make sure it is sufficient for the job.

When I gave my computer to my mother (she was hacking away on a Pentium 166), she said that my system was a bit noisy for her. Well, thanks for giving me life and all, I changed out the power suply fan with an 80mm Panaflo L1A. Rated at 21 dBA, 24 CFM, it's whisper quiet now.

[ficus]

Try earplugs? If you're not tender eared, the kind designed to keep water out of your ears during water sports can be obtained at a pharmacy and also keep most sound out.

I know, I know. You want to be able to hear some things, just not the power supply.

[deltaf508]

Thanks for all the replies...I gave my friend all this info and he is checking out all your cool links http://www.sysopt.com/forum/smile.gif

Thanks,

Gary

[Bob The Great]

From what I've heard. Making the fan bigger, and slowing it down fixes all the problems (or else it's making the fan smaller and speeding it up http://www.sysopt.com/forum/smile.gif I'm pretty sure making it bigger and slowing it down is the one. But any way. It moves the same amount of air. But doesn't mess with it or something so it's not so loud. So it could be just as eficent, but quieter.

[Bsdboy]

You're right Bob I'm a believer in large slower rpm fans over small high rpm ones you get good airflow with a bit less noise.

Bsdboy

[araaraara]

The noise a fan makes is mainly created by the speed of rotation and the pitch(angle) of the blades. A 10 000rpm fan with the blades almost perpendicular to the shaft would be quieter than a 5000rpm fan with the blades almost parallel with the shaft. Just put a good sized socket 7 fan in your psu and it will be silent.
Szech-didn't you post a while ago about your psu you modified with chicken wire and stuff to make it quiet?

[bhess]

Doesn't the cube from mac not have a fan? I think it works from convection. There is a hole at the top.
I'm not sure why it has to have a fan. Is it because of all the different volts converted to? Why can a transformer to any appliance (radio,printer,12v halogen light) get away without one?

[Szech]

Oh yeah araaraara, how could I forget? http://www.sysopt.com/forum/smile.gif
http://fordpinto.homestead.com/Chickenpowersupply.html

I must note, however, that the noise reduction for me was mostly due to the fan not being balanced (cheap fan). When I rubber mounted it, the vibration noise went away. The hissing went away as well, which was caused by the air hitting the (obstructive) fan guard.

I have since replaced that fan with a low noise Panaflo, and got a real fan guard http://www.sysopt.com/forum/smile.gif. The fan is itself inaudible, but the noise caused by air going over the PSU's internals is still there. I was thinking about making it temperature controlled a-la www.virtualhideout.com (http://www.virtualhideout.com) 's how-to section, but I gave it to my mother, and she says it's fine.

The shape of the blades also has some factor in sound/performance. Not to mention the finish and the sharpness of the edges. The smoother the finish and the sharper the edge, the better the fan will push air.

[koaptec]

Szech got lost at the virtualhideout! Would you Please post the link to making a fan temp controlled. Thanks!

[Szech]

Whoops! Sorry, that should be virtualhideout.net. Here's the link to the guide: http://www.virtualhideout.net/guides/temp_controlled_fan/index.shtml

I didn't sleep last night. Szech no function sleep well without =P.

[modah2k]

i completely agree with Axel up there. i bought extension cables 2 days ago, and my computer has never been this silent! lol

i absolutely love it http://www.sysopt.com/forum/smile.gif)

Jan

[unfguy]

Invest is a quality soundcard and some decent speakers, pop in your favorite tunes, crank it up. Fan noise should then be effectively masked. http://www.sysopt.com/forum/smile.gif

PS: subwoofer highly suggested...

[Bob The Great]

The problem with having the case in another room is when you want to change CD's. Good excersise though! http://www.sysopt.com/forum/smile.gif