A 3- to 4-pound boneless ribeye roast needs to cook for 1.75 to 2 hours to reach medium doneness. The roast should be cooked at a temperature of 350 degrees Fahrenheit.
If a medium-rare doneness is desired, a 3- to 4-pound ribeye roast should cook for 1.5 to 2 hours and reach an internal temperature of 145 degrees.
A 4- to 6-pound rib roast with a bone needs to cook 1.5 to 2 hours to reach a medium-rare temperature. This roast cut needs to cook for 1.75 to 2 hours to reach a medium temperature.
A boneless roast should be allowed to rest for 10 to 15 minutes before serving, and if it contains a bone, it needs to rest for 15 to 20 minutes.