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

RAM Upgrade Question


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Peakoverload

 
Member Since: Feb 13, 2007
Location: Worthing, West Sussex, UK
Posts: 207
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Mac Specs: 27" iMac 3.1Ghz 16GB RAM, 1TB HD. iPhone 4.

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I've just bought a new iMac which came with 4GB of RAM but I want to upgrade it to at least 8GB and ideally 16GB (apparently the maximum it supports even though there are 4 slots each of which support 8GB DIMMS).

I wondering if there is any performance difference in using just 2 memory banks or all 4?

If I upgrade to 8GB should I buy 2 more 2GB DIMMS or replace the existing RAM and replace with 2x 4GB DIMMS?

If I upgrade to 16GB should I use 2x 8GB or 4x 4GB DIMMS?

Or does it not matter?
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codda

 
Member Since: Apr 20, 2010
Posts: 472
codda is a jewel in the roughcodda is a jewel in the rough
Mac Specs: 21.5 iMac 3.06 ghz 12gb ram 500g HD iPad 2 16G

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Matching pairs top and bottom...any combination...just matching.
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Peakoverload

 
Member Since: Feb 13, 2007
Location: Worthing, West Sussex, UK
Posts: 207
Peakoverload has a spectacular aura about
Mac Specs: 27" iMac 3.1Ghz 16GB RAM, 1TB HD. iPhone 4.

Peakoverload is offline
Quote:
Originally Posted by codda View Post
Matching pairs top and bottom...any combination...just matching.
Cheers Codda. Have ordered now 4x4GB as this was massively cheaper than 2x 8GB
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