Road Traffic Signs are graphical symbols that display traffic regulations and road information. They can make traffic regulations visually, concisely and concisely expressed. At the same time, they also express the content that is difficult to describe in words. They are used to manage traffic and indicate the direction of driving to ensure the smooth flow of roads and the safety of driving. Applicable to highways, urban roads and all special highways, with the nature of the law, vehicles, pedestrians must comply with. Road Traffic Signs Road Traffic Signs,Traffic Light Sign,Road Safety Signs,Highway Road Traffic Signs Yangzhou Heli Photoelectric Co., Ltd. , https://www.heli-eee.com
Compared to CPUs, graphics cards, monitors, and other components that have obvious effects, there is one unknown in the computer, but it is also the most critical role, that is - power supply. Maybe you would say that it is not a power supply device. What matters is not important. You are wrong. The power supply is the basis for the operation of the computer. Once it happens, various parts of the computer will have various symptoms. For example, the USB interface cannot be used. The system has a blue screen, frequently restarts, and the hard disk cannot be identified. Although the power supply itself does not show abnormalities, this is exactly the reason we need to pay attention to it.
The most frequently encountered problem with power supplies is insufficient power, so the first thing to consider when choosing a suitable power supply is power. Now most products will be marked with two values: rated power and maximum power, the former being the power at normal operation of the power supply, and the latter being the highest limit of power supply. We select the power supply, the rated power is the need to pay attention (beware of bad businesses use the maximum power to deceive the hardware white Oh).
So how much power does our computer need? Is the bigger the better? If you don't have the money, then it's good to go to the big expensive buy; if not, then we'll look at the calculation of power. Each part of the computer has its own power consumption. Adding them together is the power consumption of the whole machine. Such as Intel Core i5 750 power 95W, graphics card GTX 460 full load power consumption is about 200W, plus the motherboard, hard disk, etc., assuming a total of 430W, in order to long-term stable operation of the computer, Xiaobian recommend that you buy power rated The power exceeds 20% of the overall power consumption, which means that it is best to purchase more than 500W of power, which is also conducive to extending the life of the power supply.
Second, have you been frightened when you used your computer for sudden power failure and tripping? Did you worry about the Thunder being in the thunderstorm? Therefore, some protection features of the power supply can make us more at ease when using it. For example, overload protection, overvoltage protection, short circuit protection, lightning protection, etc.
There is also a parameter of power supply which is more important: PFC, Chinese means power factor correction, the greater the power factor value, the higher the power utilization rate. Current computer power is divided into passive PFC and active PFC, passive PFC power factor can only reach 0.7 ~ 0.8, but the market price is lower; and active PFC power factor of up to 98%, the disadvantage is that the price is relatively passive high.
Finally, in the current society that advocates energy conservation and environmental protection, low-carbon “control†people can also find their favorite products. The computer power supply has its own energy-saving and environmental protection standard: 80 Plus certification. At present, the certification is divided into four levels, from high to low are: white gold, gold, silver, bronze, white. In this small series also suggest that you can consider buying 80Plus, after all, can save a lot of electricity in one year.