RAM upgrade MBA A1466 820-00165

[Dozer]

starting highsierra osx from external is no problem in system i can see 16GB RAM

 

[2informaticos]

Maybe bad solders, or even a bad RAM chip...

 

[tomtom67]

You maybe want to get in touch with Colin (dosdude1). He has a video on YT where he did the RAM expansion, and mentioned he had to modify EFI to enable booting.

 

[2informaticos]

That is old 2012 Air, which Apple didn't manufacture it in 16GB configuration.
2015-17 Air machines have 16GB configuration option on the MLB.

 

[Dozer]

thanks tomtom67 from this i was inspired to try this.

the state now is i can start high sierra without problems and i can see the 16GB in the system information. the main problem still is its randomly freezing .
so my guess there is wrong timing configuration. what do you mean?

 

[Dozer]

i think i figured it out.

got another 11" 820-00164 and i had still 4 RAMs left, so I soldered them there in and the same problem occurs.

today i found out that the SEC K4E6E304EE-EGCE I ordered has only 16Gb that means 2Gbyte !

So I soldered 8GByte in the Board and configured it as 16Gbyte, that should be the problem. I configured it now to 8 GByte and all is working well. Ofcourse i wanted to upgrade from 8 to 16, but now I have again 8 )

Ok )))) I ordered now 32Gbit Chips from Hynix H9CCNNNCLTMLARNUD and i will report back when done

nice christmas everyone

 

[Dozer]

ok got he new chips H9CCNNNCLTMLARNUD
with that all working good. so problem solved