Fan noise when I Target Disk Mode - power supply or 500 GB drive, or RAM?

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Level 10

85,314 points

Fan noise when I Target Disk Mode - power supply or 500 GB drive, or RAM?

I have a Revision B iMac G5 which falls squarely in the power supply replacement program and has had the power supply replaced twice. I'm wondering if my extra RAM, or larger hard drive could be to blame for the fan speeds upramping at random during normal operation, and always when I Target Disk Mode the machine. I have a Western Digital WDC WD5000KS-00MNB0
and two 1 GB RAM modules with the following spec PC3200U-30330.

Before I try to pin down the cause one by one, has anyone noticed whether there are 500 GB drives on these Macs which will not up the fan speeds? Has anyone noticed whether target disk mode on these models will not increase the fan speeds when RAM is upgraded to 2 GB?

MBP 15" 2.2 Ghz/iMac C2D 2.17/20 inch/iMac G5 1.8 1st gen/iMac G4/Mac OS 9, Mac OS X (10.5.1), AppleTV, Samsung TXP-3064W HDTV, HP SJ 3970, Epson R220

Posted on Dec 22, 2007 9:34 AM

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Answer 1

MGW

Level 7

27,047 points

Dec 22, 2007 9:58 AM in response to a brody

Your fans will normally ramp up in TDM, during that operation the fans are not being controlled by the iMac, and I doubt it's the drive either. 2GB of RAM is within the normal amount of RAM, so I think your problems will still lie with your power supply.

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Answer 2

a brody Author

Level 10

85,314 points

Dec 22, 2007 10:02 AM in response to MGW

Not what I wanted to hear. Cause those fans make me worry it might work itself to death. Oh well. I guess I'll have to Target Disk Mode the other direction. Thank you.

Message was edited by: a brody

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Answer 3

gaobi

Level 1

0 points

Mar 7, 2008 1:56 AM in response to a brody

same problem here. very loud fan noise when my imac is in target disk mode. it also won't appear as volume when connnected to my new macbook. could you solve it?

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Answer 4

Mar 10, 2008 12:32 AM in response to a brody

I have the same iMac as yours. Changed the original 80 gig hdd to a 250 gig. Both drives are seagate barracudas. I also upgraded the memory to 2gigs. The fan noise was terrible.

6 months later a ram module gives up the ghost. I originally thought hard drive, so purchased a Western digital 500 gig WDC WD5000AACS-00ZUB0. (The green power series).
http://www.wdc.com/en/products/Products.asp?DriveID=338

Fans very quite. still waiting for the replacement ram module;
to see if extra ram will increase fan noise
.

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