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Dual Channel RAM on iMac
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Junior Member
Join Date: Jul 2006
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Does the Intel iMac have support for dual channel RAM? The reason for me asking this is that I'm trying to make a descision whether to get 1x1GB or 2x512MB of RAM on the 20" iMac I'm looking at. I used to mainly be a PC person, and in PCs 2x512 always beats 1x1GB, but I'm not sure if it's different for macs. Thanks.
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Junior Member
Join Date: Jul 2006
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Haha! My question was answered by mduell's sig. And I quote: "All of the Intel Macs support 4GB RAM (2x2GB) and asymmetric dual channel (matched pairs are not needed)." Thanks mduell! I guess I'll be getting 2x512MB since I don't plan on upgrading any time soon. >1GB is just excessive, don't you think?
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Mac Elite
Join Date: Jun 2005
Location: UK
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Originally Posted by Def Jef
. >1GB is just excessive, don't you think?
I think more than 4 gig is excessive. I have 1.5 gigs in my iMac and find it to be enough at present. I am wondering what performance will be like with 1 GB RAM, as for the time being, when I get my MacBook, I am planning to take 512 out of my iMac and put it into the MacBook, making it 1 Gig in each
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iMac Core Duo 1.83 Ghz | 1.25GB RAM | 160HD, MacBook Core Duo 1.83 Ghz | 13.3" | 60HD | 1.0GB RAM
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Junior Member
Join Date: Jul 2006
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Originally Posted by harrisjamieh
when I get my MacBook, I am planning to take 512 out of my iMac and put it into the MacBook, making it 1 Gig in each
Sorry to break this to you, but you just can't do that. A desktop DDR2 module is a 240 pin DIMM, whereas a notebook DDR2 module is a 200 pin SO-DIMM.
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Dedicated MacNNer
Join Date: Feb 2006
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Originally Posted by Def Jef
Sorry to break this to you, but you just can't do that. A desktop DDR2 module is a 240 pin DIMM, whereas a notebook DDR2 module is a 200 pin SO-DIMM.
The intel iMacs use so-dimms also same as the MBPs
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Mac Elite
Join Date: Jun 2005
Location: UK
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Originally Posted by Def Jef
Sorry to break this to you, but you just can't do that. A desktop DDR2 module is a 240 pin DIMM, whereas a notebook DDR2 module is a 200 pin SO-DIMM.
As said above, all the new Intel Macs - desktop or laptop - so far use the exact same memory modules - SODIMMs of DDR2 memory running at (IIRC) 667 Mhz.
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iMac Core Duo 1.83 Ghz | 1.25GB RAM | 160HD, MacBook Core Duo 1.83 Ghz | 13.3" | 60HD | 1.0GB RAM
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Junior Member
Join Date: Jul 2006
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Oh wow, that's weird. I'm sorry for being a noob 
I'm used to PCs, where it would be ridonkulous to have notebook memory in a desktop.
So do you think I should go dual channel or leave room for upgrades? I'm personally leaning towards dual channel, but I could be swayed.
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