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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

iMac - RAM Module Question


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kitjv

 
Member Since: Jul 10, 2007
Posts: 74
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I have an iMac 1.25 GHz 20" which uses PC2700 DDR SDRAM modules. In addition to the factory-installed 256 Mb module, I have added a 512Mb module.

I would like to upgrade to the machine-rated 1GB of RAM maximum. Thus, I have few quick (& remedial) questions:

(1) Can the factory-installed 256 Mb module be replaced or is it permanently installed?

(2) If it is permanently installed, I will have to replace the user-installed 512Mb module. Since (I assume) that the next larger size of RAM would be 1GB, would this be a problem (since total installed RAM would be 1.25GB)?

(3) Which manufacturer(s) would you recommend for high-quality RAM modules?

Thank you for your help!
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the8thark

 
Member Since: Jan 27, 2007
Location: *Brisvegas*
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Mac Specs: 17 inch 2 GHz C2D imac (5,1) with 3GB DDR2 RAM, X1600 (128MB memory) GPU - OSX 10.6.3

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1. Yes it can be replaced. As far as I know all ram modules can be replaced.

2. According to mac tracker your imac has the following 2 ram slots:
PC2700 200-pin SO-DIMM (user accessible)
PC2700 184-pin SDRAM (Factory Installed)

And it says the maximum ran you can have in it is:

2.0 GB actual
1.0 Apple

So by that definition you can have 2 GB of ram in your mac. 1 GB from apple in it's factory installed slot and 1 GB you add yourself. I think. I'm not sure if that factory Ram can be removed. I'm pretty sure it can be though.

And Apple says this here about your mac's memory.

http://support.apple.com/specs/imac/iMac_USB_2_0.html

256MB of PC2700 (333MHz) DDR SDRAM; supports up to 1GB

So hmmm I think even if 1.0 GB is the max memory you can have. Having 1.25 GB of ram in your machine shouldn't affect it at all. Cause only 1 GB of it will be accessed by the machine and the last 0.25 GB will be just forgoten about. Well I think that's how it works. Anyone want to confirm of deny this?

3. If you're in the US a store called Newegg has been suggested here many times. I don't live in the US so I'm just taking the words of the members here.
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