9400M shared memory always 1/8 of total system?

Discussion in 'iMac' started by dubhe, May 5, 2009.

  1. dubhe macrumors 65816

    dubhe

    Joined:
    May 1, 2007
    Location:
    Norwich, UK
    #1
    Looking at MacBooks, iMacs and Mac minis with the NVIDIA GeForce 9400M graphics, which share memory with the main system.

    I notice on all 2GB machines the graphics has 256MB of SDRAM and the machines with 4GB the graphics has 512MB. Does this mean if I bought a base model mac mini, with 1GB memory and 128MB SDRAM, increased it to 4GB of memory, I would have 512MB of shared video SDRAM?
     
  2. Cave Man macrumors 604

    Cave Man

    #2
    It appears to be capped at 256 mb, even with 4 gb of RAM. Of course, those of us with hackintoshes with this chipset can get 512 mb. ;)
     
  3. dubhe thread starter macrumors 65816

    dubhe

    Joined:
    May 1, 2007
    Location:
    Norwich, UK
    #3
    But if I bought the basic Mac mini with 1GB and therefore 128MB video and upgraded to 4GB I would get at least the same 256MB of video SDRAM as if I had bought the top spec Mac mini, with the larger hard drive I don't need?
     
  4. J&JPolangin macrumors 68030

    Joined:
    Jul 5, 2008
    Location:
    Thule GL @ the TOW
    #4
    ...yes, adding 2 or more GB of RAM seems to bump it to 256 MB of shared memory...
     
  5. dubhe thread starter macrumors 65816

    dubhe

    Joined:
    May 1, 2007
    Location:
    Norwich, UK
    #5
    Thank you, just saved myself £100! Only need the 120GB HDD but wanted the maximum memory.
     

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