This one is quick,
is there a chance to upgrade macbook air mid 2011, 11.6 model DDR3 RAM from 2GB to 4GB?
No, the RAM is soldered onto the Logic Board. Only the SSD is replaceable/upgradeable.
+ very correct
I know it is technically very, very hard to upgrade just the rams. So here’s my question: Is it possible to swap the whole logic board (the one that has soldered 2gb ram with an original 4gb ram model)?
Emir Tuna 2019年05月22日
Self employed contract worker
MacBook Air '11 logic board (backside)
Note the two rows of chips on the bottom edge these of the DRAM chips which are soldered to the logic board and can't be swapped out.
I'll just leave it here.
I know this is an old question but I want to add some information for reference.
This board can support a maximum of 4GB. It is possible to to replace the bga ram chips with hot air soldering. According to the BOM options list for this board it can be populated with HYNIX, SAMSUNG, MICRON or ELPIDA ram chips. They have to be of the same type and of the right type.
Before even considering this type of upgrade you will need experience of similar work or practice. You will also need a schematic of the logic board, boardview software and a board view file of the logic board, a hot air rework station, stencils for memory chips and solder paste or solder balls and flux.
I would also recommend having a micro soldering pencil and to use low melt solder. And a microscope makes it a lot easier. To my knowledge the configuration resistors are 0201 size (0.6mm x0.3mm).
In short: If you have the equipment and the skill it can be done.
Vikstrom - Keep in mind this is not a DIY type of project! I service Mac for a living and even I do dive in to this level of alteration.
Besides, the cost of the parts and getting someone with the needed tools to do it would be prohibitively expensive given what you can buy today for the same amount.
Dan - I agree that this isn't something most people do themself in the weekend. But with a keen eye and steady hands and a lot of practice this is possible. And I still think it's a lie to say that it can't be done...
Alexandr's video shows the kind of procedure that is required. But it isn't the same logic board and therefore the type, and number of ram chips are different. And the location of the configuration resistors are different.