anyone of you know why, with a simple 68 Mb file (see below)
I have a commitment of more than 3 GB of memory ... (see below)
Any suggestions to reduce the amount of memory? thanks so much
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Because with autoCAD, 64 MB is not a simple model. On top of that because ASD uses custom objects, it stores more data in the file than vanilla AutoCAD would, so you can have more objects in a smaller file than if you were using plain AutoCAD objects. To test this use the export to AutoCAD option.
The video card has to work just as hard to display the shapes regardless of whether you're using AutoCAD solids or custom objects.
Also, you're probably showing a bunch of nuts and bolts which are extremely memory intensive. You'll probably see better performance if you freeze some of the object layers.
Autocad becomes lazy when Drawings are generated. I see 2 possible solutions for a "smoother" experience
1) Split the project in multiple projects (there is this option)
2) From model create separate files with each drawing. (the downside is that if you make a modification, it will not be reflected in previously created files.
See, that's the thing. The program isn't designed for big steel structures. Any program built on top of AutoCAD currently is not designed for BIG. You can always spend more money, there just comes a point where the money spent is less than the gain received. Only you can justify how much to spend.
Your RAM and video card are a bit weak. I got with a Nvidia Quadro 2000 at least (1 GB of RAM on the card), bump up your RAM on your computer to 16 GB and you should see a decent performance boost between the two. I wouldn't spend much more than that.
Here's some reviews by Cadalyst:
If you're trying to visualize everything at one time, Revit has better performance than AutoCAD. ASD works, but you have to be willing to using xref's...like most people do with 3D inside of AutoCAD. Even Revit will have its limits.
ditto about the Graphics card and ram
the quadro5000 goes very well but the 2000 should do the job, id love a 6000...maybe if I win the lotto.
we split xrefs into :