Mix together salt, black pepper and red pepper. Coat steaks with oil, garlic and spices and let sit in refrigerator for at least half an hour. Heat Sous Vide to 131 degrees for medium rare or 135 for medium.
Place steaks in vacuum bag. Add sprigs of rosemary and thyme if using. Seal bag and place in sous vide bath. Let cook in sous vide for at least 1 hour but no more than 4 hours.
Heat a skillet oh high heat with butter. Remove steaks from water and bag. Place steaks in skillet and cook until char crust develops. About 4 minutes per side. Serve immediately.