Completely different card than I'm using... NVidea Quadro FX3400 here.  Guess we're having different problems. I turned the gizmos off, which helped some for me. Still, lots of strange behavior which all appears to be graphics related. But yes, slow and jerky is part of it.

My biggest wish right now is to be able to pan a view.  That's the main reason I'm using V5 to set things up.