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Model A1418 / Mid 2014 / 1.4, 2.7 & 2.9 GHz Core i5 or 3.1 GHz Core i7 Processor

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Have Model 2.9 and 1.4 the same logic board?

I buy now (november 2014)the model 21.5 2.9 mhz, with 8 GB RAM, the guide is EMC 2638 or EMC 2805?

So in the future if i want upgrade memory is it possible?

Thanks

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Is this your machine? Although Apple does not intend for one to upgrade the RAM after purchase, and doing so is difficult, it is possible.

If this answer is acceptable please remember to return and mark it.

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