Activity Monitor shows 256MB less

Discussion in 'iMac' started by vijmal, May 22, 2011.

  1. vijmal macrumors newbie

    Nov 23, 2006
    I just upgraded my late 2009 iMac 24" to 8 GB RAM. the RAM is from Strontium and system profiler says that I have 8 GB. but when i open Activity Monitor i get only 7.75 GB.
    Reading some posts it sugests that the extra 256MB could be the video ram. but when i had 4 GB (the original) activity monitor would show 4 GB.
    is the RAM bad or is the video card now taking 256 as there is just more ram ?
  2. NutsNGum macrumors 68030


    Jul 30, 2010
    Glasgow, Scotland
    Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_1 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8B117 Safari/6531.22.7)

    If you've got an nvidia 9400m, then it's the graphics.
  3. vijmal thread starter macrumors newbie

    Nov 23, 2006
    this is what system profiler says about the graphics card
    Chipset Model: NVIDIA GeForce 9400
    Type: GPU
    Bus: PCI
    VRAM (Total): 256 MB
    Vendor: NVIDIA (0x10de)
    Device ID: 0x0867
    Revision ID: 0x00b1
    ROM Revision: 3379
    Resolution: 1920 x 1200
    Pixel Depth: 32-Bit Color (ARGB8888)
    Main Display: Yes
    Mirror: Off
    Online: Yes
    Built-In: Yes
    Display Connector:
    Status: No Display Connected

    Is there something in the card to say that if there is more than 4GB then take 256 MB ?
  4. nightfly13 macrumors 6502a


    Jul 17, 2008
    Ranchi, India
    That onboard GPU was always using 256mb. Curious that it didn't show up before.
  5. Icy1007 macrumors 65816


    Feb 26, 2011
    Cleveland, OH
    The 9400M takes 256MB from the system memory for use as VRAM.
  6. vijmal thread starter macrumors newbie

    Nov 23, 2006
    exactly that is what is causing confusion for me.
  7. vijmal thread starter macrumors newbie

    Nov 23, 2006
    this happens even on new machines. not sure if this has something to do with a bug or not

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