I have really never noticed MS cuz i'm using only one 8800card but i remember that in need for speed pro street it feelt like the scenes at the beggining of a race micro stuttered. I remeber that a lot of people complaind about it. It got better for me after a while after driver updates but has anyone tested multi gfx sys with nfs pro street? Not a very good game but i must say that it was a bit more demanding than grid.