There is something wrong if you're idling at 50c and hitting 90c under load. Either the heatsink is flawed and not seating properly, or the thermal compound is either crap or not applied properly, or you don't have optimal airflow pathes in that case. Either way, something isn't right there. Is 1.33v a lot compared to the oem voltage of that CPU? If you're running an overclock, maybe you should downclock it...
Edit : In your User CP, click add/edit your system. This way you can have all your specs in your sig, which helps us help you.