can I use PC3-10600S mem modules in a late 2009 iMac?

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can I use PC3-10600S mem modules in a late 2009 iMac?

I recently upgraded my Mac Mini's memory to 16 Gb. I took out two 2Gb PC3-10600 modules and installed four 4Gb modules. I now have two 2Gb PC3-10600S memory modules in-hand. My wife has a 21.5 inch, late 2009 iMac running OS X 10.8.5, with two 2Gb memory modules installed. I haven't opened up the iMac yet so I don't know the exact part number of the modules in the iMac. My question is, will I be able to install the two PC3-10600 2Gb modules in the late 2009 iMac to achieve a total of 4Gb?

Thanks for any help.

Kevin H.

Mac mini (Mid 2011), OS X Mountain Lion (10.8.4), Photoshop CS6

Posted on Jul 22, 2014 12:54 PM

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Answer 1

Jul 22, 2014 12:59 PM in response to kjhart0133

No, that will not work. The Late 2009 iMac uses PC3-8500 DDR3 1066 MHz memory modules. The 10600 will not work. And iMacs are extremely sensitive to their ram modules, mixing module types never works.

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Answer 2

kjhart0133 Author

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Jul 22, 2014 1:11 PM in response to Ralph Landry1

Thanks, Ralph, for answering my question so quickly. I assumed they wouldn't work, but I thought I'd best check with the experts.

Kevin H.

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Answer 3

Jul 22, 2014 1:13 PM in response to kjhart0133

You are welcome...always saves frustration when one checks first 🙂

A great site to check for info is: http://www.everymac.com then click on iMac (or Mini) and find the year/model and you can get all of the data on that machine.

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