Is Photoshop able to keep the files on RAM only while
doing batch scan? If not you want a faster disk rather
than more memory.
Herbet.
--- Gerald Cermak <[EMAIL PROTECTED]> wrote:
> herbet brasileiro writes some very good info on
> computer choices:
>
> [good stuff deleted]
>
> > There's no point
> > in installing 768Mb of RAM in a computer with a
> 500MHz
> > Pentium Celeron processor because processor power
> will
> > be an issue before all this RAM gets used.
>
> This point is questionable from a scanning
> perspective, and I'll give an
> example from last night:
>
> PIII/733 256MB Ram, Photosmart S20 bulk scanning (4
> frames per strip), and
> 16 bit RGB at 2400 dpi. Each image when saved to
> disk with LZW compression
> takes between 35 and 60 MB. That means the raw
> image in Photoshop 5.0 LE is
> at least 50 MB. When I get done bulk scanning a
> strip of negatives, there
> is considerable disk activity and very long delays
> in Photoshop while I try
> to save out the images. This setup definitely needs
> another 256MB or RAM
> for a total of 512MB (max limit of the Intel 815ep
> chipset on this
> motherboard). 4 images at 50 MB is 200MB, so some
> paging does occur with
> only 256MB RAM, since the OS (Win2000 server)
> generally takes about 90MB for
> itself upon booting. Even though the system is a
> PIII/733, the processor
> doesn't help much, and even a Celeron 500 would
> appear fast compared to the
> slow disk. This is just a case in point specific to
> digital imaging that
> makes our requirements as digital darkroom
> photographers a little different
> than the average PC users' needs.
>
> My recommendation is to go for as much memory as the
> system reasonably
> supports. Image files in the future will only get
> larger, not smaller. A
> quick calc of a 4000 dpi scan using 48 bit color
> results in a raw image byte
> size of 144 MB, meaning a bulk scan of 4 images
> would need 576MB just for
> images! Wow, I think my next PC gets a GIG of
> memory.
>
> Cheers,
> Gerald
>
>
>
>
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