Do you need a lot of Ram to run better OpenGL?

I have 128 megs of ram and a Geforce 2, mx 400 6mb and I can only set my OpenGL setting to 14 mb. Some of my games just don't run as fast as they should. If I get more ram will it help?

The memory settings for OpenGL is about the video memory on the card. I think it is best to use the default settings.