[Grommit]

I'll avoid repeating things that have already been said, but I'll offer you a comparison between two computers that I have running inventor which serves a useful purpose.

One of them is a (roughly) 1.5 gHz P4, nice Ti-4200 GeForce grfx card, along with 512 mb ram. Another is a (roughly) 2.0 gHz P4, some 128meg (I think)ATI card, 768MB ram, but the hard drive was completely full. The 1.5gig ran inventor much much smoother, and I'm not certain, but I'm quite sure that Inventor uses a paging file of some size on your hard disk and benefits from an uncluttered drive. Although this is not the main concern, it might help you to consider clearing your hard disk as well as these other things... defragging each week won't hurt. Aside from that, I do recommend a good graphics card, but I can't honestly say I know that it will make a difference. As far as AMD versus Pentium, I've gone Pentium in the past, but don't ask me.