Vue7 has a good opengl, better than vue6. I have no reason to complain about it in my system.

The opengl depends on the graphic card you have. Maybe you can try to install the latest drivers for it.
Did you run the compatibility test, in File->Options->Display? Is your card "approved"?

Is this room one large object or many individual ones? If it's one, maybe you could try to ungroup it into several.