Hmm, I use the default settings in Nvidia control panel and I have 4Gb ram, Nvidia 8400 GS, a 7 year old card, with 1Gb video ram and a busted fan the past 3 years. I consistently hit 50-60fps when I log in. Maybe after a couple of hours in a heavy town, it'll drop to 30-35.
I can maybe suggest https://support.istaria.com/index.ph...ode=view&id=69 to use those default settings.
That might be a bit out of date. When I open my Nvidia Control panel, the Manage 3D settings are highlighted (left) by default. The right window pane would be the Restore button (near bottom). I find those the best settings.
I also find that just lowering the Max View Distance a tad can help out a lot, too. I used to run everything full max. I still have have all the other slider bars to far right (max detail) but have my view distance to about 3/4.