How much power is enough for the installed power?

In the WeChat of yesterday, there was a message from a small partner that he didn't understand the power supply. In fact, many small partners know that matching power supplies depends on power. This is absolutely true, but how much power is needed in the end? For the same power power Xiaobian will recommend this model instead of that model? Let's talk about the stress of power supply today.

How to calculate computer power?

To select the right power source, you must first know how much power your computer needs. In fact, as long as you master the processor and graphics card, the two major power consumption of the largest power consumption is very good. Taking the current new generation of products as an example, the entry-level and mainstream processor power consumption is about 70W, and the high-end processor is 100W; the entry-level and thousand-level graphics cards power consumption are calculated in accordance with 100W and 150W, respectively, and are about 2000 yuan. GTX 1060, RX580 and other graphics cards, power consumption counted as 170W is enough. As for the other parts of the power consumption, a total of less than 100W look. Note that if it is a multi-drive computer, the start-up current surge will be large, which requires that the peak power (not the rated power) of the power supply is relatively high.

In this case, it is easy to calculate how much high-power power supply is selected. For example, if the mainstream i3-8100+GTX 1050 Ti is selected and no extra accessories are selected, then the maximum power supply capacity required is the basic power 100W+ mainstream processor. 70W + thousand-level graphics card 150W, is about 320W, select 350W power supply is enough. It should be noted that the power supply mentioned here is "rated power", that is, the power that can be continuously and stably output for a long time, not the so-called "maximum power" that the power supply can only reach in a short time.

Power consumption

Some young partners may be surprised by the power supply when they look at the configuration. The three or five hundred watts of power will be consumed for a while. Who can stand it? In fact, you don’t have to worry about it. Most computer accessories are dynamically depleted. The power consumption of a typical state is only about half or even lower than the highest power consumption. When you play a game or run some high-end programs, the total power consumption of the computer will be closer. The highest value.

If you look at the power supply side, the actual power consumption is actually higher. For example, when the computer needs 200W power consumption, the actual power consumption of the power supply may be 240W. This is because the power input power is not all available to the computer. There is also a part of the conversion due to heat due to a class of reasons consumed, this ratio of power input and output is the power of the " conversion efficiency ." The so-called “Bronze, Silver, Gold, Platinum” power supplies now mean different conversion efficiencies. Among them, platinum-brand power supplies have the highest conversion efficiency, and the worst copper power conversion efficiency is also above 80%.

These configurations are also important

In addition to power, the selection of power supply also pay attention to some details, such as the use of a 12cm fan power is very good for use in the upper power supply chassis, but for the lower power supply it is easier to enter the gray, in some small chassis may also Inconvenient, at this time the tail 8cm fan design power is more practical. In addition, to use the chassis back wiring, you must choose the power cable length of 40cm or more. Chassis volume is not enough? It can remove a part of the useless power supply line, so that the inside of the chassis more refreshing module or half module power is the most suitable!