Actually, over 2GB of RAM would be overkill due to the fact that system does have some memory limitations (unless you've re-written some code.)

David

Also, is 128MB of RAM for the one attached directly to CPU?  This is
less than the RAM of our current system.

That was probably 128MB on the video card.

Does this mean memory is not
that critical for visualization?  Our data file is typically tens of
MB.  When we animate it, dx sometimes aborts saying that there is not
enough memory, so we have to make the size of file smaller by selecting
fewer number of data at each grid cell (our data is multi-valued, up to ~30
variables).  This is another source of frustration.  Is there any
recommendation for this as well?

As much as you can afford. Eight gigabytes of RAM wouldn't be overkill in many cases; from my (albeit limited) experience with DX, I wouldn't recommend anything less than 1 or 2 GB.
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David L. Thompson                          The University of Montana
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