My mom always cooked a roast this way (not a pot roast) and I do the same way.
Bring roast to room temp (30 minutes will do) Preheat oven to 400, put roast on roasting rack (fat side up if there is...
(Old answer_2 hours) I was hoping people would be more specific with such an expensive cut of meat! Cook to an internal temperature of 125F then let sit 20minutes cut and serve.