Advice: 3GB or 4GB?

Discussion in 'MacBook Pro' started by John01021988, Jan 1, 2008.

  1. John01021988 macrumors 6502

    May 11, 2007
    Hey! I have a 2.16ghz macbook and I am wondering what would be the best thing to do. Currently I have 2.5gb of ram installed and I want to max out my mac's ram capacity (eventually I will add a 7200 rpm hard drive, or maybe a ssd drive) So I am wondering what would be the best thing I could do with my ram: Add the other 2gb stick so I can take "advantage" of the Dual Channel or just add 1GB sitck..... Also I've read the Understanding Macbook Ram in the Guides section, but I did not understand if the 3.3gb ram cap is hardware of software related. Ayone can explain me this? Thank you
  2. heatmiser macrumors 68020

    Dec 6, 2007
    Yes, it's hardware related. Due to the chipset, the OS won't see more than 3gb, even though the BIOS will recognize 4gb. The only way to get past this is to upgrade to a Santa Rosa+ chipset. Yes, add one more 2gb stick. The dual channel apparently makes a significant difference, despite the 3gb limitation.

    See the last few posts in this thread:
  3. aethelbert macrumors 601

    Jun 1, 2007
    Chicago, IL, USA
    Go with 2GB. If you watch newegg, you can find some good deals with rebates. I just got a 2GB stick from there for less than $30 shipped (after rebate). Unfortunately, that rebate expired yesterday, but new deals pop up frequently.
  4. John01021988 thread starter macrumors 6502

    May 11, 2007

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