EXT wrote:

Check the internet, there is a whole specialized market producing products
with quiet fans, quiet power supplies, chip coolers and other products to
silently remove the heat. If your fan is too noisy, upgrades are available.
Many upper grade mother boards will control the fan speed according to the
temperature of the CPU chip.

"Stubby" wrote in message
. ..

That's very simplistic. What about changing the fan pitch? The duct
shape? Load-dependent speed?



Ivan Vegvary wrote:

wrote in message
...

My computer power supply fan is terribly noisy when I first turn it
on. After a few minutes it quiets down and is fine till the next time
I turn on the computer. Then I go in my barn and turn on an electric
heater and the fan in there is just as noisy, but it too quiets down
once the thing is running for a few minutes. Why do these small fan
motors do that? If a bearing was bad, I dont think they would quiet
down. I just learn to live with the noise as long as the motors run.

G.T.

Fan designers have two principal ways of increasing output. Increase
horsepower or increase r.p.m. Increasing speed is a lot cheaper than
horsepower, ergo, NOISE.

Ivan Vegvary




You can also buy adhesive backed acoustic padding to line a computer
"tower" case with and a labrinth type "muffler" to screw over the fan
opening.

IME (A sample of one.) spending about $35 on buying both of those items
didn't do ****e to reduce the fan noise enough to satisfy SWMBO.

Buying her a new computer did.

Jeff

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.