To see the power supply power of the computer host has the following steps:
1, open the desktop computer host cover (side), you can see the upper left corner of an iron box. This iron box is a desktop power supply, the box above the corresponding parameters are affixed to the table, we can clearly see the maximum output power is 400W.
2, the maximum output power of 400W, in fact, is greater than the rated power of the computer, the maximum output power is just a representative of the computer's power consumption can not be more than 400W the maximum limit, once more than this limit, the computer will cause damage. Once exceeded, the computer will cause damage. The power rating is calculated from the parameters on the power supply box.
3, desktop power supply form parameters are different, the power supply rated power calculation method is different: for example, ATX 2.03 calculation formula for 5V output voltage * 10 = rated power. Another example is the ATX 12V 1.3 calculation method: (5V output voltage + 4)x10 = rated power.
Extended information
Methods for choosing a computer power supply:
1. When choosing a power supply, the first thing to do is to look at the brand of the computer power supply, and it is best to choose a power supply of a well-known domestic brand, such as Lenovo, ASUS, or you can choose a computer corresponding to the domestic cell phone, such as Huawei computer. Quality power supply will definitely have PFC, PFC quality is relatively large, you can judge by weighing the quality, the quality of the larger for the quality of the power supply.
2, choose the power supply should also consider the power supply fan, high-quality power supply is generally equipped with a larger fan, in order to facilitate heat dissipation. Blowing good quality, low sound is also very important, many times power supply damage is due to fan failure, resulting in too slow cooling, which in turn leads to power supply damage. So when choosing a power supply, pay attention to the quality of the fan as well.
The relationship between the rated power of the computer and the actual power: Because the total power consumption of the computer contains the motherboard + cpu + graphics card + memory + hard disk + optical drive + mouse + other equipment, resulting in a power conversion rate, generally about 80%, such as the rated power of 500w, the actual power is about 400w.
The working principle of the computer power supply: computer power supply is the 220V alternating current, converted to direct current, and specifically for computer accessories such as motherboards, drives, graphics cards, and other power supply equipment, is the hub of the computer components of the power supply, is an important part of the computer. Most of the current PC power supplies are switching type power supplies.