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My parents have an iMac circa 2007. Documentation says that this model should use this type of RAM:

Memory: DDR2 PC2-5300 Memory Type: DDR2 PC2-5300, DDR2 (non-ECC) Maximum Memory: 4GB

I've got a couple of 2GB RAM chips lying around that I just pulled from my "new" iMac. The info on the chips reads:

2GB 1Rx8 PC3

Will these work in my parent's iMac, or am I just asking for trouble?

Thanks!

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Apple's support knowledge base is probably the most definitive source for answers for this question. –  koiyu Nov 23 '12 at 17:09
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1 Answer

No.

Those new iMacs are using DDR3, and it won't even fit.

DDR2 are pretty cheap right now, you can get some off the Internet.

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Thanks for your help -- figured as much. –  alex cutter Nov 23 '12 at 16:25
    
You can read more about DDR2/3 on Wikipedia! –  Shane Hsu Nov 23 '12 at 16:40
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And Other World Computing has your back for legacy upgrades. –  Dan J Nov 23 '12 at 17:08
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