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Old Dec 12, 2010, 10:51 PM   #1
Deville
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Quick hardware question

Hi,

One of my fans died on my G4 dual 1ghz. I took it out, got a new fan but I forgot which way it is supposed to blow the air. I put it in so it sucks air into the tower towards the processor, but I'm a bit unsure maybe it is supposed to blow the air out?

I forgot to check before I pulled it out. Here is a picture, if someone could please confirm the airflow direction that would be great.

Thanks.



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Old Dec 12, 2010, 10:54 PM   #2
Dalton63841
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I have never owned a PPC Mac, but most every tower blows air OUT of the tower, to suck the heat off the heatsink and out, instead of keeping the heat trapped in the tower.
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Old Dec 12, 2010, 10:58 PM   #3
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Yea, thats what I figured aswell, but it has a much larger fan to blow air out. Anyone know for sure? I'm about 80% sure that fan I have circled was sucking air in, but I could be wrong.
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Old Dec 12, 2010, 11:06 PM   #4
tom vilsack
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this guy says toward heatsink....

http://www.applefritter.com/node/6319

ok one of you guys with one..open the puppy up and which way should it blow?
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Old Dec 13, 2010, 01:25 AM   #5
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Quote:
Originally Posted by tom vilsack View Post
this guy says toward heatsink....

http://www.applefritter.com/node/6319
This guy is talking about B&W which has different fan direction (because it has only one fan).
This is completely wrong for Quicksilver. In QS big fan sucks in air, small sucks it out.
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Old Dec 13, 2010, 08:32 AM   #6
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Quote:
Originally Posted by tom vilsack View Post
...ok one of you guys with one..open the puppy up and which way should it blow?

just pulled a 2001 QS off the shelf, pulled out the fan in question from the rubber mount thingy, and verified the direction and flow from the arrow marks on the (stock) fan housing.

first pic is correct. the fan in question blows air on the heatsink, so blowing air into the case. the big fan behind the hard drive pulls air out of the case, and the fan in the power supply pulls air out of the case.

best of luck.
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Old Dec 13, 2010, 10:17 AM   #7
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Quote:
Originally Posted by 4JNA View Post
just pulled a 2001 QS off the shelf, pulled out the fan in question from the rubber mount thingy, and verified the direction and flow from the arrow marks on the (stock) fan housing.

first pic is correct. the fan in question blows air on the heatsink, so blowing air into the case. the big fan behind the hard drive pulls air out of the case, and the fan in the power supply pulls air out of the case.

best of luck.
Thank you!
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Old Dec 16, 2010, 11:06 PM   #8
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Hey guys one more question on this thing. Since I upgraded to a Radeon 9800 pro my temp is around 50 degrees, it used to sit at about 40 - 45.

I noticed that the large fan, below the power supply isn't doing anything. Is this normal?

Does it only kick on at higher temps or what? The other 2 fans are working fine ( one by the heatsink and one in the power supply ), but I'm just not sure about the big one, is it supposed to run all the time?

Thanks
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Old Dec 17, 2010, 04:09 PM   #9
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ttt

Can anyone verify if the big fan I'm talking about it supposed to run all the time? Thanks
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Old Dec 17, 2010, 11:01 PM   #10
Dave H
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ttt

Can anyone verify if the big fan I'm talking about it supposed to run all the time? Thanks
I think it is supposed to run all the time.
It did in my G4 "Digital Audio" (one model older).
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Old Dec 17, 2010, 11:22 PM   #11
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That fan is supposed to be on all the time. I used to own a QS and it ran all the time.
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Old Dec 17, 2010, 11:29 PM   #12
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Thanks guys I guess it's dead then, it has never ran as long as I owned it. I hope it's only the fan and not something else.
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Old Dec 18, 2010, 04:10 PM   #13
Dave H
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If you only need a fan, I can recommend one of these.
I replaced my main fan with one more than 2 years ago and it has worked well. It moves more air than the stock fan and isn't any louder.
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