Hey guys maybe you can help me out here. I'm using Maya 7 on a new laptop. I have a Gig of RAM and an ATI Radeon series card (not sure of exact make but it is a brand new laptop)

So my problem is that when I run Maya 7 and I start working on a reasonably low poly head everything runs smoothly until about 15 minutes in, then it starts getting choppy. When I restart Maya on the same project, it's back to running smoothly again. So my question(s):

Is this a graphics card problem? (I heard ATI cards sometimes have trouble with MAYA, but I don't understand why it would run smoothly at first for a while and THEN start getting choppy when the same actions are being performed again.)

My only other theory is that there is some kind of history that is filling up my computers mem and causing it to go slower as I fill it with more actions. I've tried deleting the objects history but it doesn't help. Are there other history files I can clear as well?

Any suggestions would be helpful. It is not a MAJOR prob at the moment, just more of an annoyance. Thanks in advance.