Digital BW, The Print

4x4800 x5x4800 x16bit = 900M of memory for the image alone!

jpeg size is not going to matter because photoshop always work on
uncompressed image.

Your best bet is to upgrade your memory to 2G at least and then get
the fastest processor or go dual processors. But a layer or two will
still use up all your memory quickly. And you can't even convert your
image to RGB easily as 16bit RGB means your image size will triple. 

Michael

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Matthew Wensing
<wensing@s...> wrote:
> I scan in 4x5 negatives at 4800 dpi, 16-bit grayscale,
> and am having a tough (read: slow) time of it with
> Photoshop 6.0 with the resulting files.  Actually, I
> can't even work with the 50-90 mg .jpeg's, but instead
> downsize to roughly 12 megapixels and then
> dodge/burn/tweak those.  Does anyone here work with
> digital files around 50-90 megs in Photoshop that is
> happy with the quickness of their setup in doing so? 
> Right now, with the machine I have, manipulating such
> files is impossible.
> 
> My machine is an Athlon XP 1.46 Ghz with 1 gig of DDR
> RAM.  Two possible bottlenecks from what I know are
> memory bus speed (333 Mhz with my current motherboard)
> and also the version of PS I'm using.  CS might be
> faster from the get-go?
> 
> Thanks in advance,
> 
> Matt
> 
> =====
> E-mail: wensing@s...
> Blog: <http://seaofglass.blogspot.com>
> Photography: <http://www.wensing-photo.com>