Go Back   MacRumors Forums > Apple Hardware > PowerPC Macs

Reply
 
Thread Tools Search this Thread Display Modes
Old Sep 22, 2011, 08:46 AM   #1
potatis
macrumors 6502
 
Join Date: Dec 2006
iMac G4 fan replacement

I replaced the broken hard drive in my iMac G4 with an SSD, so now it runs more quiet, and I guess cooler too. But now I keep thinking the fan is too loud. As the SSD makes the machine cooler, I figure the fan is a bit overkill now.

I can't get programs like G4fancontrol to do anything, probably because there is no heat sensors in the iMac G4. So what I wonder is, can I replace the standard fan with another fan with less rpm or something, that makes less noise?
How much cooler might the iMac be with no mechanical drive, and what fan is therefore a suitable replacement?

I read that the fan should be 92mm, is it so? Will a 3-pin connector / 4-pin Molex connect? Would any of these suit?
http://www.clickok.se/PartDetail.aspx?q=p:2516657
http://www.mjmultimedia.se/products/...n-adapter.aspx

Last edited by potatis; Sep 22, 2011 at 10:17 AM.
potatis is offline   0 Reply With Quote
Old Sep 23, 2011, 03:54 AM   #2
iDutchman
macrumors 6502a
 
Join Date: May 2010
Location: Amsterdam, NL
Hi,

A quick question here! I have an 800mhz 17" iMac G4 which I'd like to have an SSD in as well. Where did you get it?

As for the fan, I'd say it's better to keep the original one.
__________________
13" rMBP - 27" iMac - Iphone 6+ (and all others..)
iDutchman is offline   0 Reply With Quote
Old Sep 23, 2011, 07:22 AM   #3
potatis
Thread Starter
macrumors 6502
 
Join Date: Dec 2006
On the net, it was a 3.5" model so it was a bit expensive and not available anymore. You could buy any 2,5" IDE model and place in a 3,5" bracket, there should be some on the net, try eBay etc. Why is the original fan better?

Last edited by potatis; Sep 23, 2011 at 05:03 PM.
potatis is offline   0 Reply With Quote
Old Sep 24, 2011, 02:58 AM   #4
reddrag0n
macrumors regular
 
Join Date: Oct 2007
Location: Canada
Send a message via AIM to reddrag0n Send a message via Skype™ to reddrag0n
i replaced the white fan with a quiet vantec fan. it's quieter and pushes more air out the top.
__________________
red-drag0n.co.nr
reddrag0n is offline   0 Reply With Quote
Old Sep 24, 2011, 02:26 PM   #5
potatis
Thread Starter
macrumors 6502
 
Join Date: Dec 2006
Quote:
Originally Posted by reddrag0n View Post
i replaced the white fan with a quiet vantec fan. it's quieter and pushes more air out the top.
How quiet is that model, does it make the iMac as quiet as the Mac mini?
potatis is offline   0 Reply With Quote
Old Sep 24, 2011, 04:32 PM   #6
reddrag0n
macrumors regular
 
Join Date: Oct 2007
Location: Canada
Send a message via AIM to reddrag0n Send a message via Skype™ to reddrag0n
I don't know what model the fan is exactly, but it is very quiet and it does push more air out that the stock slotted fan. Plus i don't use the iMac on a regular basis since the graphics card is toast and i need a new logiboard replacement. But when i VNC'ed into it with my G5, i had it on for hours, and i didn't hear a thing. I felt alot of air coming through the top of the dome, so i know the fan is running.

I took out the white fan, installed a 92mm regular fan, using a 3 to 4 pin adapter connected to the hard drive power and that's how the fan runs.. So if there is a temperature sensor for the white fan, it won't read properly.
__________________
red-drag0n.co.nr
reddrag0n is offline   0 Reply With Quote
Old Sep 24, 2011, 09:20 PM   #7
potatis
Thread Starter
macrumors 6502
 
Join Date: Dec 2006
Could it be the Vantec Stealth fan? Is a 3 to 4 pin adapter needed or will it connect even if you don't have one?
A multicolored fan like this would turn it into a discoball? http://midnightimods.weebly.com/uplo...839365.jpg?347

Last edited by potatis; Sep 24, 2011 at 09:51 PM.
potatis is offline   0 Reply With Quote
Old Sep 24, 2011, 10:30 PM   #8
reddrag0n
macrumors regular
 
Join Date: Oct 2007
Location: Canada
Send a message via AIM to reddrag0n Send a message via Skype™ to reddrag0n
I don't know what fan it is exactly, and it just works.

As for the 3 to 4 pin adapter, yes, you will need one, since the iMac fan connection is in reverse. The fan has male pins on it, while regular fans have a female plug end.

As for the LED fan, if that shakes your boat i guess....
__________________
red-drag0n.co.nr
reddrag0n is offline   0 Reply With Quote
Old Sep 25, 2011, 04:35 PM   #9
potatis
Thread Starter
macrumors 6502
 
Join Date: Dec 2006
Would this work you think? http://www.clickok.se/PartDetail.aspx?q=p:923574
It looks a bit tangled, but I assume if I plug the fan into the 3-pin female, the signal goes to the 4-pin male that must plug into the computer hard drive cabling - is it 4-pin female on the iMac?
Or should I use this one?
http://www.clickok.se/PartDetail.aspx?q=p:923573
It looks like 3-pin female to 4-pin male, or am I wrong?
Or maybe one of these with both 3- and 4-pin at one end is better?
http://www.clickok.se/PartDetail.aspx?q=p:919302
http://www.clickok.se/PartDetail.aspx?q=p:919453
http://www.clickok.se/PartDetail.aspx?q=p:1294220
Not sure if the 3-pin connector is female on all of them though.
potatis is offline   0 Reply With Quote
Old Sep 25, 2011, 05:09 PM   #10
reddrag0n
macrumors regular
 
Join Date: Oct 2007
Location: Canada
Send a message via AIM to reddrag0n Send a message via Skype™ to reddrag0n
Either of these ones will do
http://www.clickok.se/PartDetail.aspx?q=p:919453
This one makes the fan run at a full 12V

http://www.clickok.se/PartDetail.aspx?q=p:1294220
This one converts the fan to run at 7V

Then you just plug the regular 92mm fan into that cable.

and how you would power the mac hard drive, you just put that in between and then you power the hard drive and the new fan.
__________________
red-drag0n.co.nr
reddrag0n is offline   0 Reply With Quote
Old Sep 25, 2011, 08:14 PM   #11
reddrag0n
macrumors regular
 
Join Date: Oct 2007
Location: Canada
Send a message via AIM to reddrag0n Send a message via Skype™ to reddrag0n
his might give you a bit more insight of what you are thinking of doing

iMac G4 Fan Mod
__________________
red-drag0n.co.nr
reddrag0n is offline   0 Reply With Quote
Old Nov 3, 2012, 08:28 PM   #12
potatis
Thread Starter
macrumors 6502
 
Join Date: Dec 2006
Well, did it at last. With the replacement fan from Arctic it sounds almost as quiet as a Mac mini. At first that is - after using the iMac for a while the fan slowly spins up and is slightly more noisier. I attached the temperature sensor behind the hard drive, but maybe there's a better place that is less hot and thus makes the fan spin less? First I had the sensor placed under the dvd drive, which obviously was wrong, since the fan went to maximum at once. Must've been hot since that's right above the logic board.
potatis is offline   0 Reply With Quote

Reply
MacRumors Forums > Apple Hardware > PowerPC Macs

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
Replacement fan wavespank Mac mini 6 Jan 18, 2014 08:54 PM
A replacement fan for a MBP 15"? riggidy MacBook Pro 2 Oct 31, 2013 07:17 PM
MDD PSU fan replacement philz4life PowerPC Macs 2 Mar 9, 2013 12:58 PM
LaCie 2big Raid Replacement Fan DanielCalladine Mac Peripherals 1 Feb 16, 2013 11:28 PM
MBA fan runs at higher RPM after fan replacement paleshadow MacBook Air 7 Nov 27, 2012 05:24 AM

Forum Jump

All times are GMT -5. The time now is 07:50 AM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC