中央處理器效能：练习题

What is the effect of increasing the clock speed of a CPU?

A user upgrades their CPU from a dual-core to a quad-core processor with the same clock speed. Why might some applications not show a significant performance increase?

Explain how Cache size affects CPU performance.

Consider a CPU with a clock speed of \( 3.2 \text{ GHz} \). If the Cache is upgraded from Level 1 to Level 2 but the size remains the same, which of the following is most likely to happen?

A computer system is upgraded from a single-core CPU to a dual-core CPU with the same clock speed.
Explain why this change might not necessarily double the performance of the system when running a single application.

A company is upgrading its office computers. The current computers have a clock speed of \( 2.4 \text{ GHz} \) and a single-core processor. The new computers have a clock speed of \( 3.2 \text{ GHz} \) and a quad-core processor.

(a) Explain how the increase in clock speed will affect the performance of the new computers.

(b) Describe how the addition of extra cores can improve performance, and why this might not always result in a proportional increase in speed for every application.

(c) Apart from clock speed and the number of cores, identify one other CPU characteristic that can be upgraded to improve performance and explain its effect.