Can install RAM

[andy9l]

I cant run a 4G by itself. If I run it with 4G and 1G it works fine. I tried all combinations with the 4G and 1G. (Example slot 1 had 4G slot 2 had 1G then swapped it so slot 1 had 1G and slot 2 had 4G) Works fine both ways. I also did this with both the 4G sticks to insure they were working. The computer is showing 5G with the 4G and 1G installed.

Could you answer these questions:

1. Does it work with a single 4GB stick inside?
2. Does it work with the other single 4GB stick inside?
3. Does it work with a single 4GB and the 1GB stick?
4. Does it work with the other 4GB stick and the 1GB stick?

If the answers to question 1 and 2 are no - it really looks like the new 4GB RAM is incompatible to some extent. As to why the Mac recognises everything when another 1GB is in there, I'm lost!

I know you've already answered 3, but for the sake of information for this thread...

What RAM did you get? Did you buy from Crucial, or just use their site for information?

 

[youstolemyname]

All combinations of 4G with 1G work.
4G alone doesn't work

It is crucial memory


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My computer is showing all my memory is 1067 and the crucial update said I need 1066.Wonder if this is the problem

 

[youstolemyname]

Ok so I found out that the Speed I posted in the above is not the actual ram speed. I though it was. The actual speed of the ram I have is 1600. 1600SODIMM MAC. Does that make sense that it could run 4G but not 8G at 1600 MTz?

 

[johnnnw]

Ok so I found out that the Speed I posted in the above is not the actual ram speed. I though it was. The actual speed of the ram I have is 1600. 1600SODIMM MAC. Does that make sense that it could run 4G but not 8G at 1600 MTz?

So this whole time it was 1600 RAM? Ughhhh


Yes that would explain why it's not working. Get the proper clock speed and it should work fine.

 

[XoFu]

So this whole time it was 1600 RAM? Ughhhh


Yes that would explain why it's not working. Get the proper clock speed and it should work fine.

I confirm that! I have 8g (crucial, 1067 RAM) in a MBP 13" 2.26 from 2009 running 10.5 and it works fine.

 

[simsaladimbamba]

My computer is showing all my memory is 1067 and the crucial update said I need 1066.Wonder if this is the problem

1066 MHz and 1067 MHz RAM is the same, as it is really 1066.66 (bar) MHz.

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[youstolemyname]

Thanks for all the help guys.🙂