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CPU Cooling (CPU散熱) (P.48)

Learning Objectives學習目標

• Identify motherboard components and describe their basic functions.

識別主板組件並描述其基本功能。

Finally, we need to talk about how to cool the CPU when it is running on the motherboard. There are several options. First, there is the passive heat sink, which is a metal device with fins that radiates heat away from the processor. This is a very quiet method of cooling the CPU. However, most modern CPUs generate too much heat for a passive heat sink alone to be effective. Therefore, the passive heat sink is often coupled with an active heat sink, where a dedicated fan is connected to the top of the finned metal heat sink to draw the heat through the heat sink more effectively.

最後，我們需要討論在主板上運行CPU時如何冷卻。有幾種選擇。首先，有一個被動散熱器，它是一個帶有散熱片的金屬設備，可以將熱量從處理器散發出去。這是冷卻CPU的非常安靜的方法。但是，大多數現代CPU產生的熱量太多，僅被動散熱片就無法發揮作用。因此，無源散熱器通常與有源散熱器耦合，在有源散熱器上，專用風扇連接到金屬翅片散熱器的頂部，以更有效地吸收熱量。

Before connecting the heat sink to the CPU, technicians should first apply thermal paste to the CPU to aid in heat transfer from the CPU to the metal heat sink. Therefore, your typical installation would be to place the CPU in the processor socket, apply thermal paste to it, then connect the finned heat sink to the top of the processor, and finally connect the dedicated fan to the top of the heat sink. A thermal paste is a phase change material that insulates the CPU. The paste is solid at room temperature, but changes to liquid at higher temperatures. When it turns to liquid, it eliminates any air and provides better insulation.

在將散熱器連接到CPU之前，技術人員應首先在CPU上塗導熱膏，以幫助熱量從CPU傳遞到金屬散熱器。因此，典型的安裝方法是將CPU放入處理器插槽中，對其進行導熱粘貼，然後將翅片散熱器連接到處理器頂部，最後將專用風扇連接到散熱器頂部。導熱膏是使CPU絕緣的相變材料。糊劑在室溫下為固體，但在較高溫度下變為液體。當變成液體時，它消除了空氣，並提供了更好的絕緣性。

Another option is to use a liquid cooled system. This operates by pumping a special liquid solution through the computer to a heat exchanger, where a fan cools the liquid before recirculation. These systems are only used in very high-performance systems and overclocked systems, and can be complicated to install and run.

另一種選擇是使用液體冷卻系統。這是通過將特殊的液體溶液通過計算機泵送到熱交換器中來進行的，在熱交換器中，風扇在循環之前冷卻液體。這些系統僅用於非常高性能的系統和超頻系統，並且安裝和運行起來可能很複雜。

When deciding on a cooling system, noise is a big concern. Passive systems are the quietest, whereas active systems involving fans are by far the noisiest. A liquid-cooled system often uses a much smaller fan to cool the liquid compared to larger CPU fans, and therefore, it is a quieter cooling method, yet quite expensive.

在選擇冷卻系統時，噪音是一個大問題。到目前為止，無源系統是最安靜的，而涉及風扇的有源系統是最嘈雜的。與較大的CPU風扇相比，液冷系統通常使用較小的風扇來冷卻液體，因此，這是一種更安靜的冷卻方法，但價格昂貴。

Computer fan. 電腦風扇。

Liquid-cooled CPU. 水冷式CPU。

Virtualization 虛擬化 (P.47) << Previous Next >> HW2