Im upgrading from a 2004 Dell OptiPlex dual core. Anything will be an improvement. The Render program I use doesn't depend on RAM it uses cores to render.
Im not looking for speed in render time increase, because this was rendered in 27 minutes with Im working with now.
What my problem has been was RAM dedication to the program I use to model. Im currently only able to dedicate 1GB of Ram to it. This means when my Model approachs around the 500 - 600 object mark the program becomes real sluggish and I have to limit myself to what 'More' I can do.
Being able to dedicate lots more RAM will give the opportunity to build more complicated things.
I'm not a gamer at all, and I actually spend much more time on my desktop now a days then I do online.
I had a limited budget when putting this together, but I did make sure I have plenty of slots open for upgrades later. And its a Major improvement over what Im working with now.