RAM Upgrade Question

Peakoverload · Peakoverload #1 (**permalink**)

02-06-2012, 07:04 AM

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?

codda · codda #2 (**permalink**)

02-06-2012, 07:25 AM

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

Peakoverload · Peakoverload #3 (**permalink**)

02-06-2012, 09:07 AM

Quote:

Originally Posted by codda

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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Peakoverload #1 (permalink)
Member Since: Feb 13, 2007 Location: Worthing, West Sussex, UK Posts: 207 Mac Specs: 27" iMac 3.1Ghz 16GB RAM, 1TB HD. iPhone 4.	02-06-2012, 07:04 AM 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?
	QUOTE Thanks

codda #2 (permalink)
Member Since: Apr 20, 2010 Posts: 467 Mac Specs: 21.5 iMac 3.06 ghz 12gb ram 500g HD iPad 2 16G	02-06-2012, 07:25 AM Matching pairs top and bottom...any combination...just matching.
	QUOTE Thanks

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