It cannot be said that the better the CPU, the more power saving. Because CPU power consumption is not necessarily. Generally speaking, the CPU power consumption in the same frame and the same process increases with its performance. In other words, the same conroe frame 65 nm CPU, the higher their frequency and cache, the higher their power. However, cpus in different architectures have different power consumption. For example, with the same performance, a CPU using a 65nm manufacturing process is more powerful than a CPU using 45nm. Simply put, the manufacturing process determines the size of the power consumption (that is, how many watts). It is not completely tied to the performance.