這類 時脈低+單位時脈執行指令高 vs 時脈高+單位時脈執行指令數低 的疑惑,只要耐心觀看以下Ace's Hardware Guide的經典文章(放心,雖是英文,但該系列報導用與淺顯易懂),就能豁然開朗:

http://www.aceshardware.com/read.jsp?id=50
http://www.aceshardware.com/read.jsp?id=51
http://www.aceshardware.com/read.jsp?id=52
http://www.aceshardware.com/read.jsp?id=53
http://www.aceshardware.com/read.jsp?id=54