3GB or 4GB?

[Wotan31]

I have a MBP with intel C2D 2.33 Ghz (Calistoga chipset). It's supposed to only support 3 GB of memory. I just installed a pair of Crucial 2GB sticks, and when I go to 'About This Mac' it shows memory as 4GB. System Profiler also shows memory as 4GB.

Surely it isn't actually using all 4GB? 😕 The Calistoga can only address 3.2 GB or something like that, so why does it show 4 GB?

 

[alphaod]

Yes it will show 4GB because that's what it is, but in reality for use if you to Activity Monitor it will only show 3GB.

 

[KingYaba]

To be exact, you'll be able to use 3.3