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Model A1174 with 2 GHz Core Duo or Model A1207 with 2.16 or 2.33 GHz Core 2 Duo

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RAM - capacity and type

I have an iMac 20" / 2 GHz / 512MB RAM computer. There are 2 slots for memory boards EMC No.: 2105. Only one slot is used = 512RAM. Can I purchase an additional 512RAM board without removing my current 512MB board? Or, do I have to remove the current 512MB and purchase a 1GB ram board? Also, please advise specifically which memory board I should purchase? I'm probably not using the correct lingo. Thank you for your help...

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Your 20" iMac which is the the early/mid 2006 iMacs (iMac4,1). The maximum RAM for that is 2 GBs. You can mismatch the RAM sticks (1 512 and a 1 gb card)

The RAM slots support 200 pin PC2-5300 (667MHZ) DDR2 SO-DIMM

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+ Ralph

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Agreed +

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This Machine uses standart DDR2 so-dimms. You can add a second memory card of 512 mb or go straight op to 4 gigs of RAM with two 2gig cards.

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Could you technically use a 1GB or 2GB stick in addition to the 512MB stick? Or does this machine require matched memory?

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I believe the max on this machine is 2GB. http://www.ramdirect.com/macs/iMacMA200L...

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I know this question is old, but if you have an iMac 2006 EARLY (please note EARLY), there is a custom ROM that you can install that will allow you to max it out at 4GB, but only 3+ will be visible.

READ all the comments in this link before you decide you want to do this. It is not an Apple supported ROM.

http://forum.netkas.org/index.php/topic,...

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