Chosen Solution
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?
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 ;-}
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
