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iMac Intel 27" EMC 2309 (Late 2009, Core 2 Duo 3.06 or 3.33 GHz) ID iMac10,1, EMC 2374 (Late 2009, Core i5 2.66 GHz or Core i7 2.8 GHz) ID iMac11,1

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RAM Upgrade - (1066 RAM) to (1333 RAM)

Hi, I have an iMac EMC 2374 with 4x 2gb 1066 RAM and just upgraded to 4x 4gb 1333 RAM. As far as i know this mac doesn't support higher MHz than 1066.... but with my new 16GB 1333MHz RAM it shows in the system 1333MHz...

My Question: Is it running with 1333MHz or does it just recognise the 1333 and running in the background with 1066?

Answered! View the answer I have this problem too

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Using higher speed RAM than it was design for is mostly over kill. You should be fine here.

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Hi, thank you fo your answer. Does it mean, the system is running 1333MHz RAM? If YES: You should be fine here? Thanks

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No, its just reporting what the RAM modules are from the little ID tag each one has. The Bus speed does not change upwardly because you have a faster module present

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dave777 will be eternally grateful.
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