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  1. #1

    CarlConti08's Avatar
    Member Since
    May 29, 2006
    Location
    Tallmadge, Ohio
    Posts
    371
    Specs:
    MacBook Pro 2.5 GHz, 2 GB RAM, 250 GB HD
    Shared Memory Graphics Card
    Will someone please explain the shared memory graphics card to me. If it sucks so much compared to the regular graphics card, then why did apple choose to use it in the macbook. Is there any way to alot more memory to the graphics card if the computer has more memory. For instance, if i upgrade the memory to 2gb, will i or is there any way to receive an increase in graphical performance? Someone help me out, i dont exactly kno what to ask someone to explain so please just explain what you can!

    Thanks!!!

  2. #2

    taseal's Avatar
    Member Since
    Jul 21, 2006
    Posts
    286
    it just means that the graphic card 'borrows' 64mb of ram from the onboard ram to do it's graphic stuff... and it has to emulate T&L which takes from the CPU...

    macbook doesnt have this because if it did, it would be just as well equipped as a macbook pro, so then man ppl wouldnt buy the mbp
    MacBook White [2Ghz] [2Gb RAM] [60Gb HDD] [Super Duper Drive]
    People that keep telling others to search = a**holes, instead be positive, and help, if you have nothing to say, leave the thread alone

  3. #3

    Aptmunich's Avatar
    Member Since
    Mar 09, 2004
    Location
    Munich
    Posts
    9,073
    Specs:
    Aluminium Macbook 2.4 Ghz 4GB RAM, SSD 24" Samsung Display, iPhone 4, iPad 2
    Shared memory means that the graphics chip doesn't have it own dedicated batch of memory, it simply accesses the main memory and uses part of that.

    So adding memory will improve overall performance, as your standard 512MB are really 432MB for the system and 80MB for the graphics.

    The graphics card can't access more memory than that under OS X though, so adding more memory will boost overall system performance, but not the graphics throughput.

    The chip was used because it's whilst it's not brilliant for games, it's cheap and affordable and has enough horsepower for probably 90% of users out there.

    Performance really isn't that bad... it's probably on par with the 64MB chip in the powerbooks and waay better than the chip in the iBooks.

    Also because this system is generally really fast, the cpu can compensate quite well.
    Do a search on macbook gaming, there's quite a few first-hand experiences posted - I am one of a number of happy macbook gamers. (It's "good enough"). If you are really into gaming though, look at the macbook pro.

  4. #4

    lionel's Avatar
    Member Since
    Jul 27, 2006
    Posts
    132
    When i was checking the shared memory on the Macbooks at my local Apple store, one of the 1GB models had 256 shared, the Genius told me the version of OS X it had allowed you to scale it the following way:

    512 RAM = 64 Shared
    1GB = 128 Shared
    2GB = 256 Shared

    Baffles me why 1GB had 256 shared but he mentioned after 10.4.7 (i think) it automatically scaled as above as needed.

    Oh yeah, and they used it because the chip itself costs $7 per unit apparently.

  5. #5

    Aptmunich's Avatar
    Member Since
    Mar 09, 2004
    Location
    Munich
    Posts
    9,073
    Specs:
    Aluminium Macbook 2.4 Ghz 4GB RAM, SSD 24" Samsung Display, iPhone 4, iPad 2
    Well I have 1,25GB but I still only have 64MB available for the graphics card....

  6. #6

    lionel's Avatar
    Member Since
    Jul 27, 2006
    Posts
    132
    Maybe while you run something like a game it scales up, i'm not sure about it, all i know is that store model with 1GB ram had 256 shared and another with 2GB had 256 shared too.

  7. #7

    taseal's Avatar
    Member Since
    Jul 21, 2006
    Posts
    286
    I have 2gigs, and I have 64 as well

    not sure where u get that 256, doesnt show in system profiler, and it would show there...

    i've also never heard of computers changing it dynamically (VRAM for gfx card)
    MacBook White [2Ghz] [2Gb RAM] [60Gb HDD] [Super Duper Drive]
    People that keep telling others to search = a**holes, instead be positive, and help, if you have nothing to say, leave the thread alone

  8. #8

    lionel's Avatar
    Member Since
    Jul 27, 2006
    Posts
    132
    I would have taken a photo, but the security guard in the Apple store said i couldn't... :/

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