300 degrees and 450 degrees Fahrenheit.
Place in the oven and reduce the temperature to 170 degrees. Cook for 2 1/2 hours per pound (for medium-rare). Transfer the roast to a platter or cutting board, tent loosely with aluminum foil and allow to rest for at least 15 to 20 minutes before carving. In general, roasts cooked using the slow-low method will follow the doneness temperature guidelines of 125 for rare, 130-135 for medium-rare and 140 for medium; that is particularly true of roasts from the rib or loin, especially the tenderloin. How long and at what temperature should I cook a beef roast in the oven? Roasting is a great cooking method for a large, tender cut of beef  such as a rib or sirloin roast. Sirloin-tip, rump, rolled-rump, eye-of-round or top-round roasts will also benefit from this cooking method if they are graded prime or choice. Cooking at a constant oven temperature of 300°F (160°C), a 5- to 8-lb standing rib roast will take 17-19 minutes per pound for rare, 20-22 for medium rare, 23-25 minutes for medium, and 27-30 minutes for well done. Start at 2:00 ... 375 degrees. Place roast in oven and cook 1 hour. Turn ... 300 degrees. The temperatures given are for sea level cooking. For high ... way, the roast beef will be a ... and perfect every time. over medium-high heat. Cook roast until evenly ... per pound. Check temperature with instant-read thermometer; ... serving platter; reserve cooking liquid. Cover roast ... Note: A boneless beef rib eye roast ... and the green onion. 3. Cooking Temperature. There are varying opinions about what the perfect temperature to cook a roast beef but in my experience starting the beef in a very hot oven 425F/220C/Gas 7 for the first 30 mins then lower the temperature to 375F/190C/Gas5 for the remaining cooking time then ....  The oven temperature used to cook a beef roast is usually set somewhere between 300 degrees and 450 degrees Fahrenheit. The recommended cooking temperature for your roast is usually determined by the type of beef cut that you plan to roast. The proper beef roast cook times and the correct beef cooking oven temperatures are extremely important. The optimum flavor and tenderness of various beef roasts can be consistently achieved when care is taken to follow the recommended time and temperature guidelines for cooking beef roasts. A beef roast cooked to medium-rare should have an internal temperature of 145°F - 150ºF after the resting period, and a roast cooked to medium should have an internal temperature of 150°F to 160ºF. (See the note below). See Beef Doneness for more information on proper cooking temperatures. Place the beef on a rack in a shallow roasting pan with the fat side up. Do not cover the roast and do not add any liquid (liquid is used for braising, not roasting). Allow the beef to roast at 450°F for 45 minutes and then begin checking the internal temperature of the meat with a meat thermometer. 1 Cook the roast for about 10 to 15 minutes and then turn it over in the pan. 2  Continue to cook it for another 10 to 15 minutes for every pound. 3  Remove the tenderloin from the oven when the internal temperature of the meat reaches 140°F, as indicated on a meat thermometer inserted into the center of the roast. Place the beef on a rack in a shallow roasting pan with the fat side up. Do not cover the roast and do not add any liquid (liquid is used for braising, not roasting). Allow the beef to roast at 450°F for 45 minutes and then begin checking the internal temperature of the meat with a meat thermometer. 1 Place the roast in the preheated oven. 2  Reduce the temperature to 475 degrees F (245 degrees C). 3  Roast for 21 minutes (seven minutes per pound) then turn off the oven and let the roast sit in the hot oven for 2 1/2 hours. 4  Do not open the door at all during this time! 1 Reduce the temperature to 475 degrees F (245 degrees C). 2  Roast for 21 minutes (seven minutes per pound) then turn off the oven and let the roast sit in the hot oven for 2 1/2 hours. 3
http://www.washingtonpost.com/pb/recipes/slow-roasted-beef/9774/ http://ochef.com/343.htm http://www.cooks.com/rec/search/0,1-0,roast_beef_cooking_temperature,FF.html http://britishfood.about.com/od/introtobritishfood/a/roastbeef.htm http://www.recipetips.com/kitchen-tips/t--1542/roast-beef-cook-time.asp http://www.recipetips.com/kitchen-tips/t--372/roasting-beef.asp http://www.recipetips.com/kitchen-tips/t--372/roasting-beef.asp http://allrecipes.com/recipe/94113/high-temperature-eye-of-round-roast/
temperature to cook roast beef at