Turns out after 3 billion different drivers / reboots / restores etc
Its the windows 7 sidebar, for some reason it REALLY winds up Catalyst and makes it run like a bag of spanners. just switched it off and re ran Pro Street, jerky mess is now 70FPS
Its the windows 7 sidebar, for some reason it REALLY winds up Catalyst and makes it run like a bag of spanners. just switched it off and re ran Pro Street, jerky mess is now 70FPS