问题描述

我们希望学会评估台式机所需要的电源功率，如此才能购买功率合适的电源；

解决方案

想要知道具体的台式电脑功率是多少，这个就要看自己的电脑配置，大家可以上网用功率计算器算出每个配件的耗电，然后再相加就知道总功率是多少了。

1）核心：主流 CPU 功率最大 100W 左右。鉴于大部分时间是在等待任务，而且很少满负荷运行，所以 CPU 的使用率一般使用是在 65w 左右。

2）显卡：因为不同的群体对显卡的要求不一样，所以显卡的耗电量也是有很多不同的，10W+的集成显卡到 70W+ 的高端主流显卡都在被广泛应用。

3）硬盘：而硬盘的功率就不是很大了，目前 ST 硬盘的最大功率为 22.5W，笔记本的更是只有 8W 左右；

4）主板：主板自身耗能功率其实也不是很大的，功率范围是在 20w-35w 之间

5）光驱：其功能消耗一般是在 10W 左右；刻录机在写盘的时候，功率也就只有 10W+，

6）电源：电源是计算机运行需要最关键的设备，电源自身耗损大概在 5W 左右，

7）显示：CRT 显示器是在 70、80W 左右；液晶显示器的耗电量在 40W 以下；

8）内存、网卡、声卡这三个硬件耗电量很低的，鉴于没有具体的数据，所以不是很了解，但是三者加起来也不超过 40W 的耗电量。

9）外设：台式电脑的音箱等外设的功率可以按照 30W 计算；

总结一般家用电脑电量计算的构成：
1）主要是：主机内的配件 CPU、主板、硬盘、光驱、显卡等 150W，
2）如果液晶显示器为 17 寸的，那么就是 40W，合计起来就是 190w。
3）综合起来的话，一台家用台式电脑功率大致是在 230-300W 之间。

电源消耗指标

How much power does a computer use? And how much CO2 does that represent? – Energuide

FIXME Power Supply 该部分内容摘率自其他文档，后面将再深入整理

常规电源消耗

The power consumption of a computer varies depending on whether it is a desktop or a laptop:

A desktop uses an average of 200 W/hour when it is being used (loudspeakers and printer included). A computer that is on for eight hours a day uses almost 600 kWh and emits 175 kg of CO2 per year.

A laptop uses between 50 and 100 W/hour when it is being used, depending on the model. A laptop that is on for eight hours a day uses between 150 and 300 kWh and emits between 44 and 88 kg of CO2 per year.

In stand-by mode the power consumption of both a desktop and a laptop falls to about a third. This contributes to the ‘vampire draw’ of your household.

待机电源消耗

The power consumption of a computer of course depends on the model and the way it is used. For instance, a laptop only uses a third as much as a desktop:

A complete desktop uses an average of 200 Watt hours (Wh). This is the sum of the average consumption per hour of the computer itself (171 W), the internet modem (10 W), the printer (5 W) and the loudspeakers (20 W). Assuming that a computer is on for eight hours a day, the annual consumption comes to 600 kWh. That corresponds to CO2 emissions of about 175 kg per year, i.e. 1.75 % of the average annual emission of a Belgian.

A laptop uses considerably less: between 50 and 100 Wh that it is on, depending on the model. If it is used for eight hours a day, consumption therefore varies between 150 and 300 kWh/year. That corresponds to CO2 emissions of between 44 and 88 kg per year (or between 0.44 and 0.88 % of the average annual emission of a Belgian).

On stand-by, the power consumption of both a desktop and a laptop computer falls to about a third. Putting the monitor on stand-by reduces its consumption by 15%. If the monitor is switched off completely, then of course it does not use any power.

Although the internet is a virtual space, using it still requires power and results in CO2 emissions. Think about it!

参考文献

太平洋 IT 百科/电脑主机功率一般多大
How much power does a computer use? And how much CO2 does that represent? – Energuide