Adding 4 gig ram
i have been in electronics for over 22 years. my soldering is perfect.
i understand the ram in a macbook air is soldered. i would like to replace the 2 gig chips with 4 gig or even 8 gig, will the macbook air hardware recognize the additional memory?
if yes, other than warrenty issues; why would ifixit team not take a chance to un-solder the chips?
The memory is soldered onto the logicboard in these computers, unless you are good at soldering, it isn't possible to add more memory, sorry!
On the other side, warranty considered, you will be voiding it no questions asked
Regards to service, I am entirely unsure about that
As with anything it could be done with the proper equipment (expensive) and a person with a very high skill level. Most people lack one or both of these requirements rendering the project not cost effective. Its easier and less expensive to trade the computer in on one that more accurately suits your needs.
I haven't seen the MBA board, so my answer will be more generic. If the memory is soldered onto the board (and we build h/w where we solder flash chips on mother boards for differnet deployments - expensive routers!), to replace/upgrade
Even after factory re-work, some boards/assembly simply fail (shorted etc). Definitely not worth the risk unless you have direct access to a mother board assembly factory and someone does it for you over there.
can it be TECHNICALLY done.
raised the challenge a bit. take a 4 gig 13 inch air and make it 8 gig by either replacing the chips or adding- considering i have not seen a closeup photo of the specific area.
i have worked with surface mount components.
i would also like to get he part numbers of the 4 gig ram that is currently in the macbook air.
i am making a presumption that the bios will recognize 8 gig. if it does not then it cannot be done. we all know the mac os does recognize more then 4 gig.
so think i need;
the part numbers of 4 gig ram that is in the 13 inch air.
the answer to the question of does the macbook air bios recognize 8 gig ram.
thanks and happy new year
Take a look here at the teardown for the late 2010 macbook air, the one with 320m graphics chip.
In the last photos i can see 8 ELPIDA chips in a row... those are the ram chips... they are DDR3 1066mhz spec.
They are double data ram so they use both channels. So four of them are 2gb on one side are one channel and four of them are 2gb on the second channel. That means that for the 4G ram version for example they use 512mb per chip, for the 2GB version that would mean 256mb per chip. The problem it seems is that most memory sticks have 8 chips per stick with a total of 16 is you count in most laptops have two slots to put the memory in.
It would appear that Apple has chosen to use "single sided" sticks with just enough room to put 8 chips instead of 16.
For those willing to unsolder... 2GB version is most certainly upgradeable to 4GB if you unsolder all the chips and solder in double density ones.
NB. There is one more thing... there is another smaller chip called the SPD which stores information about the memory, speed, latency and so on. This might need to be changed too ... or overwritten with new data with something like Thaiphoon Burner. Or it might just work out of the box.
Now the problem with the 4GB version and upgrading to more is more stringent. First, you are limited my the number of chips so you can only increase density. In a normal situation, i know for a fact 320m will support two full 8GB of ram, and i've even seen 16GB ... i plan to get one pair to max out my mac mini 2010 (using the same 320m).
But with the Macbook Air essentially having space to use only half the amount of chips... just 8 instead of 16 you would need to get JUST ONE normal 8gb so-dimm memory stick (or buy a pair totaling 16gb and give one to a friend) and use it's chips... unsolder them and resolder on the mac. Make sure they are the same make and model Elpida, Hynix, Micron or Samsung of the original ones if possible.
This is risky, it might just not work, but you can probably resolder the old ones and be ok.
PS. Make sure you use an infrared soldering machine when doing it... you don't want to do more harm than good.