Hello here... I have problem like this one
"Low FPS + 99% GPU load unless I restart PC" (it is thread's name here on mmo-c forum,but can't post links yet,sorry)
,but a bit different. 2-3 mins after every boot my GPU suddenly loads to 99% and my GTX560Ti's temperature starts to grow from 35-40C to 55-60C. If i reinstall(or delete) drivers - problem solved,but only till next restart. I tried as mentioned clean(with driver sweeper) install of beta drivers, or previous 28x.xx drivers - doesn't helped me.
Your help,solutions,ideas will be appreciated.