Chug4u...
Look at my specs in the sig block....running about the same as you cept for the card....
The vid choppiness is due to textures/skins loading I think....
Fly for a bit let them load and see how it goes....
Aside from that put your sliders at the DEFAULT.....
Give it a shot and see how it looks
other than that I will post my NEW settings/computer and let you know how it goes....
Regards,:)