I have a Dell Dimension 4700 with 4GB of RAM and a Pentium 4 with HT Tech.

The graphics are the integrated chipset.

I know that Morrowind will play, but does anyone have a clue as to how well or what game options can be turned all on?

I actually have a high-end computer, but it is in need of a new hard drive>-

You're probably fine.

This being an old game, I expect your PC is capable of handling maxed out 'vanilla' game options.

MGE(XE) might be more of a struggle, depending on the graphics card.

Yeah, you'll definitely be fine.

you know, I used to play on about 115 Mb of RAM with everything turned of and it would play fine. a little slow and choppy in large battles or group animations but it still played.