2GB RAM recognized but anything over 2GB is no go

Good Afternoon,

Depending on the MacBook you may have, you may not have support for anything above 2GB of memory.

CoreDuo MacBook's support no more than 2GB of RAM...

Core2Duo (Current Model) MacBook's support 2GB officially or 3GB unofficially.

Hope this helps! 

David

Do you have a core duo or a core 2 duo?

Hi varhamur,

welcome to macbook forum.

As Mort and David said, I believe yours is the original core duo that "capped" to max of 2 GB.

If you just bought that 2 gb module, just refund it and use the matched pair of 1 GB, for apple also said that matched pair "increase" performance since it use max bandwidth if installed in matched pair.

Good Luck.

i was wondering about that...i have a c2d with 4gb physical ram, under tiger activity monitor would show 3gb ram, system profiler would show all 4gb. in leopard both system profiler and now activity monitor show 4gb ram. i know that the chipset in the macbook is not santa rosa and 3gb should be the max...is this just activity monitor recognizing 4gb but only being able to access 3gb of it (as in tiger) or at this point does having 2 2gb sticks slow things down? any thoughts would be appreciated.

thanks, all

I don't think you need to worry. It will only access what it can use. The matched sticks should still help with graphics the way it did before. The software just recognizes it is there.