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Mid 2009 Model A1278 / 2.26 or 2.53 GHz Core 2 Duo processor EMC 2326

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What is the numbering of the DIMM slots?

Hi all,

I have a bad DIMM in my A1278, but I'm not sure which slot is which. Does Slot 0 correspond to lower, and Slot 1 to upper, or vice versa?


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some guy figured that out himself on his own macbook (same model as yours)

according to him, 1 is closer to the logic board (below 0 I presume) and 0 is closer to the bottom cover (top I presume)

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Nice research grasshopper ;-)


Excellent! I will give it a try. Many thanks.


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Andrew Macbride will be eternally grateful.
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