Macbook - after upgrade ram it wont turn on

[Radass23]

Hi, I have macbook A1342.
Im upgrading ram from 2gb to 8gb.
Before 2x1gb and I buyed 2x4gb.
But I have problem. When I installed 2new ram modules, macbook wont turn on, only after 5sec beeeep.
When I install 1x old ram 1gb and new 4gb, macbook works and turn on.
I tryed all combination, but works only with 1x old ram and 1x new ram (5gb), but macbook support 8gb. Where is a problem, please? Thank u

 

[DeltaMac]

I think your new memory is just too different from the old memory, and probably a bit too fast for compatibility with your MacBook. It "kinda" works, but not with both new sticks at the same time. That's not a very accurate "technical" explanation for what's happening, but your best choice should be memory that has timing/speed that is within the specs for your MacBook
Your 4GB memory is PC3-12800 (1600 MHz)
Specs for your MacBook (and the original 1GB stick that you show) is for PC3-8500 (1066MHz).
Return the 12800 pair, and purchase a pair of PC3-8500 (1066 MHz)
(If your MacBook is the 2.4 GHz 2010, then you COULD go with 2 x 8GB for a max of 16GB. Not sure if a 2010 is worth the extra cost of 16GB, but that would be up to you...

 

[jsmith_273]

I think your new memory is just too different from the old memory, and probably a bit too fast for compatibility with your MacBook. It "kinda" works, but not with both new sticks at the same time. That's not a very accurate "technical" explanation for what's happening, but your best choice should be memory that has timing/speed that is within the specs for your MacBook
Your 4GB memory is PC3-12800 (1600 MHz)
Specs for your MacBook (and the original 1GB stick that you show) is for PC3-8500 (1066MHz).
Return the 12800 pair, and purchase a pair of PC3-8500 (1066 MHz)
(If your MacBook is the 2.4 GHz 2010, then you COULD go with 2 x 8GB for a max of 16GB. Not sure if a 2010 is worth the extra cost of 16GB, but that would be up to you...

DeltaMac is bang on the money with this one, you have purchased RAM with an incorrect MHz speed

 

[Radass23]

Ah, okay mate, thank u very much. And I can put 1x old and 1x new together for 5gb ram without problems? I need using my laptop for work. Laptop works with old and new, but not same RAM. Thank u

 

[DeltaMac]

hmm...
"works" may not be the same as "works reliably". I recommend that you return the new RAM, and get the correct speed for your Macbook.

 

[ScreenSavers]

That’s a super common issue with those MacBooks. Ideally you need PC3-8500 in there. It’s actually not an issue, as the laptop isn’t compatible with higher speed DDR3 DIMMs. If you’re using 10600 or 12800 speed it won’t turn on UNLESS you “mix” it with a DIMM of the correct speed. The proper solution is to buy two 4GB PC3-8500 DIMMs.