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iMac G5 maximum HD size
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Fresh-Faced Recruit
Join Date: Sep 2004
Location: FL
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I have been wanting to upgrade the HDD in my iMac G5. I have the standard 80GB drive, and want to go much larger. Does anyone know what the maximum size HDD the iMac supports? i would like atleast 250GB, which i think it supports, but was thinking about buying larger. Thanks for you help.
I have one of the original iMac G5's with 17" display, 1.8GHz, 1GB, 80GB.
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Mac Elite
Join Date: Sep 2005
Location: Los Angeles, California
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Apple has a 400 GB HD as a Build-To-Order option on the new iMacs, so I'm pretty damn sure a 250GB drive is supported. 
I think 500 GB is currently the highest capacity drive on the market, and I'm also pretty sure the iMac (and OS X) support them.
(Last edited by brokenjago; Oct 9, 2005 at 07:56 PM.
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Linkinus is king.
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Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
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In theory the limit is in the hundred million gigabyte range, in practice the limitation of the implementation may be lower (but still larger than you'll ever want to put in an iMac).
Any Serial ATA drive on the market (including the 500GB Hitachi) should work fine.
250GB is the best in terms of cost per storage space (about $0.40/GB).
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Fresh-Faced Recruit
Join Date: Jul 2005
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But be careful with the temperature in the iMac, as its already very very hot inside. Those modern large HD gets to 75 degree at times and may be hotter because of iMac is so compact...
Choose one of the 5200 rpm drive instead of 7200 rpm does help...
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Moderator  Join Date: Apr 2000
Location: Gothenburg, Sweden
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My iMac has a 250 gig drive, so that works. 400 gigs also works. I'd say any SATA drive you can find is likely to work.
The rpm of the drive has nothing to do with the heat it generates. I'm sorry, but it doesn't - the friction is so low that its negligible. What does have an effect is the size of the cache memory - the bigger the hotter. Don't remember if mine has a 2 MB or 8 MB cache - I'll check when I get back home.
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Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
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Originally Posted by P
My iMac has a 250 gig drive, so that works. 400 gigs also works. I'd say any SATA drive you can find is likely to work.
The rpm of the drive has nothing to do with the heat it generates. I'm sorry, but it doesn't - the friction is so low that its negligible. What does have an effect is the size of the cache memory - the bigger the hotter. Don't remember if mine has a 2 MB or 8 MB cache - I'll check when I get back home.
I'm not so sure, 7200RPM drives typically draw more power than 5400RPM drives, and that power is converted into heat.
But it's a moot point, since I don't think you can even buy 3.5" 5400RPM Serial ATA hard drives; they're all 2.5" notebook drives.
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