Hi, I've been monitoring my activity monitor and by the looks of it nothing ever uses more than 100% of the cpu, I have a dual core and theres 200% available of course. I've installed something called cuda as I thought this might change apps to use 200% but doesn't appear to have done anything? Applications in particular are my CAD applications like AutoCAD and Google Sketchup - Both latest versions. Could anyone enlighten me on why we have dual cores not actually doing anything? Luke. Attached an image of when I just set an application to do a big task - its using only 100%, note in the bottom left its states 45% idle... (its not, not responding, just doing a big task) edited, found that programs can use one cpu, but running side by side they can run on one 100% each. What about enabling them to run at 200% each?