What work unit? it'll be like this: Project: 10102 (Run 506, Clone 1, Gen 9) found from the log. Each work unit can vary in size, so some take alot long, and some make less points.
The enviromental variables are put in to changed the cards performance. It'll drop the cpu activity to near 0%.
I'm not with that, so some ati folder will have to help you.