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The computer currently has a faulty logic board with a 2.6 GHz i7 and 16 GB of RAM. Is it possible to replace it with the one with 2.3 GHz i7 and 8 GB of RAM or are they incompatible?
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While you could swap out your logic board I'm not sure if the direction you are going will leave you happy. Your downgrading both the CPU and the RAM.
As it turns out many of these system have a bad tantalum capacitor. You see Apple put the cheaper caps near the GPU which can cook them! I've now have had repaired over 12 boards where the cap was upgraded with a better mica cap which solved the problem!
How about finding someone to fix your logic board. I think you'll end up being much happier and it will be cheaper than replacing the logic board ;-}
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here you have the two motherboards
the 8gb
the 16 gb
It seems to me that all the connectors are in the same spot, so yes you can downgrade to a 2.3, 8 Gb of ram
From my experience the board number 820 3332 from your board is the same like the other only difference is A or B at the end.
@mayer please correct me if i'm wrong
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The trick is staying within the same build MacBookPro9,1 in this case. These are direct drop-in's. Sometimes the next model up will also work! As Apple doesn't modify the cases as often as they do with the logic board. But even still you do need to watch the I/O connections and display interconnection as they might change.
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The issue I've been having is the standard GPU problem where the laptop can't seem to use it's Nvidia 650m anymore. Apple told me that it would be $800 to replace the board, but all it needs is a tiny capacitor swapped out?? That sounds too good to be true...
Aaron Beaudoin さんによる
The GPU problem is caused by the high heat burning out the cap the part you need is less than 20 cents and about three hours if nothing else is bad.
Apple as well as its service centers don't do board level repairs only logic board swap outs which is why they quoted you the higher cost.
Dan さんによる
@danj could you give me the cap number you are talking about please?
Oros さんによる
Here's a similar issue: Problem with NVIDIA GeForce GT 330M 256 MB?
My board guy it more knowledgable on this than I am. He tells me the caps are the ones near the GPU that cook. He just replaces them.
Dan さんによる