Photoshop + Mac Pro (RAM Question)

Discussion in 'Mac Pro' started by NRose8989, Jun 22, 2008.

  1. NRose8989 macrumors 6502a

    Feb 6, 2008
    Sorry if this has been address already but since the current version of photoshop CS3 is only a 32 bit application. Does this mean that it can only address 3GB of memory like in 32 bit operating systems. or does it still react like normal applications and pull memory from the pool as it is needed? thanks.
  2. Bampei macrumors member


    Jun 23, 2008
    Quick Answer: to adressing 3GB due to the 32-bit OS.

    Dirty Answer:

    Elementary computing math. Both Panther and Tiger, under which Photoshop CS3 was developed and released, are 32-bit operating systems.

    The 2(32) limitation still holds for all 32-bit applications (minus overhead/application footprint 2(31)).

    Because one bit is reserved, the calculation has to be 2(31), which works out to 2147483648, and that's why up through CS2, the Photoshop limit was around 2 GB as it was for any other applications because of the limitation imposed by the 32-bit OS.

    In CS3, the Photoshop engineers devised a workaround the limitations of the 32-bit OS to let it access about 3 GB.

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