Hugh RAM usage on fresh restart

Discussion in 'MacBook Pro' started by OngL, Apr 8, 2011.

  1. OngL macrumors member

    Feb 17, 2009
    I have just upgraded from MBP 2008 Unibody running 10.6.7 to MBP 2011 running the exact 10.6.7. The issue that I had is that upon a fresh restart, I see significant increase of RAM usage between the two.

    iStat is installed in both laptops and upon fresh restart MBP 2008 has about 930 MB on some boot-ups and 1.05 GB RAM on others. For MBP 2011, the RAM usage is between 1.3 GB to 1.4 GB RAM. Both has similar start-up application e.g. dropbox, istat, growl and standard apps.

    All I can identify is that the built-in graphics shared memory between 2008 and 2011 is different by 128 MB (256 vs 384 MB), however, the RAm differences between the two after boo is about 400-500 MBs.

    Is there a good explanation for this? I mean the OS is the same, the hardware shouldn't impact the RAM usage that much, should it?
  2. marc11 macrumors 68000

    Mar 30, 2011
    NY USA
    Compare the apps and app memory usage in Activity Monitor between the two, that will tell you where the extra ram is going.
  3. OngL thread starter macrumors member

    Feb 17, 2009
    Did that but doesn't seems apple-to-apple despite both are Intel and runs on 10.6.7. The kernel task and windows server processes has different size on both (significantly). So can't be comparing this way.
  4. mulo macrumors 68020


    Aug 22, 2010
    Behind you
    the integrated graphics card uses the system ram as Vram, and uses 387MB at minimum. so theres part of it.
    it al has to do with hardware.
  5. OngL thread starter macrumors member

    Feb 17, 2009
    Yes, I have taken this into consideration that the new MBP has 128 MB more tham than older MBP, still doesn't explain the 200-300 MB missing after offsetting the 128 MB.

    You wrote minimum 387 MB, does it go higher than that? I thought max is 385 MB?

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