^^^There's your answer. If you have been raising 3x then stick with that if you are the opener. It is suggested that you should mix-up your raises but don't do it to the point where opponents can put you on a hand. For example, don't min raise always with Ax, pps, or scs and then 5x raise with QQ+. Especially in a cash game. In the beginning stages of most SNGs and MTTs you want to raise big with your monsters.