The teacher asked the students to give an example of being illiterate. The student said: 'For example, if the fly is not illiterate, it will not fall on the adhesive tape that clearly says the sticky fly paper.'
The meaning of this little joke is very simple, but it can also inspire us. With a little bit of effort to study the details, we can be more efficient when choosing a product, that is, the so-called sharpening is not a mistake.
Many friends don't know the power of the host. The expensive products are too much for budget. It's cheap and it is difficult to ensure that the quality is easy to damage the hardware. So many friends also need a convenient way to choose reliable products. Below I will teach you how to pass the parameters. The nameplate chooses the right power for you.
↑↑↑The parameter nameplate is skewed, and the product with too much gap is not used.
First of all, the parameter nameplate of the power supply should be neat and clear. All the words and icons are clear and easy to identify. If the minimum requirements can not be met, then this kind of shoddy products should not be used as well.
3C certification is the most basic
Many friends have seen 3C certification on vehicles, electrical appliances and other products, this certification is also essential in the power supply.
3C certification is China Compulsory Certification, which is the national standard implemented by China. It is formulated by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China (AQSIQ) and the China National Certification and Accreditation Administration (CNCA).
3C certification mandates the certification of all types of products for import, export, ex-factory, sales and use. Only certified products can be considered to meet mandatory requirements in terms of safety, electromagnetic compatibility (EMC) and environmental protection.
The desktop power supply should use the S&E safety and electromagnetic compatibility certification mark, which means that the power supply has passed the safety and electromagnetic compatibility test, and it has protective measures for the user and the host hardware during use.
电源No 3C certified power supply
In other words, a power supply without 3C certification cannot meet the mandatory requirements, and there is no minimum security. Such products must not be selected.
Rated power should be selected
Everyone chooses the power suitable for their platform when selecting the power supply. The power here is the rated power. The rated power is the power that the power supply can stably output for a long time. The power supply can maintain a stable output at this power. The preferred parameter should be.
If the power supply does not indicate the rated power on the parameter nameplate, but wants to use the 'maximum power' or 'peak power' to confuse the audiovisual, then be careful, such a product is likely to be a knockoff, the internal materials are not sufficient.
The maximum power refers to the peak power that the power supply can output in a short time. The power supply cannot be stable for a long time under this power. If the consumer selects the power supply according to the maximum power, it is easy to malfunction, and the damage is serious. hardware.
In addition, in some Taobao machines, the power supply used by the merchants is also the maximum power rather than the rated power. This can be said to be cutting corners. When encountering such a host, we should avoid it. We should pay attention when looking at the parameter nameplate. As long as the power supply is not clearly marked with rated power, regardless of the business's rhetoric, this product can not be bought.
Safety certification mark is a guarantee
The power supply in other countries and regions also requires local certification. These certifications will also be reflected on the parameter nameplate. We mainly look at CE certification, which is the European certification. This symbol represents the product manufacturer or service provider to ensure the product. In line with the corresponding European Union directives, and the corresponding evaluation procedures have been completed.
The power supply to Europe needs to have the CE mark. The power supply product must pass the low voltage command and the electromagnetic compatibility directive to pass the CE certification. Of course, if it is not sold in the European market, it can be without CE certification, but this certification mark can also explain The product complies with the relevant instructions.
For domestic players, CE certification can be used as an additional reference certification. On the one hand, it can be stated that this power supply is planned to be sold in the European market. On the other hand, CE certification means that it can pass the low voltage command and electromagnetic compatibility instructions, and can also provide relatively more secure power supply for the hardware.
Also referred to is the RoHS specification, which aims to eliminate lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers in electrical and electronic products, making products more conducive to human health and environmental protection.
It should be noted that the RoHS specification only regulates the material composition and process standards of electronic products. It is not mandatory, so we can use it as a process level when selecting products. Generally, products with high level of technology are in quality and Performance will not be too bad.
80 PLUS icing on the cake
80 PLUS is a specification for power conversion efficiency. It is certified to have conversion efficiency of 10%, 20%, 50% and full load (100%). All efficiencies should be above 80% to pass the certification. To reduce energy waste. This certification is currently under the responsibility of Ecos Consulting, ERPI testing.
The most direct meaning of 80 PLUS is to reduce electricity bills. Power supplies with higher conversion efficiency consume less power while outputting the same power, and can reduce electricity bills under the same usage environment.
In addition, a higher conversion rate means less heat loss. That is to say, the heat generated by the power supply is smaller, and the requirement for heat dissipation is reduced. The fan can meet the power supply requirement without maintaining a high speed, and the power supply can be operated more quietly.
What we need to pay attention to is that some products use the counterfeit 80 PLUS certification mark, and use 85+ or other words to confuse the audio-visual. In fact, the product has not passed the 80 PLUS certification, such products are also to be avoided.
Finally, we remind everyone that the power supply is related to the stable operation of the whole machine. When choosing a product, it must not be cheap. It is not wise to buy small hardware. In addition, purchase hardware should be purchased from regular channels to avoid buying fake and shoddy. Products, preferred products with brand protection are also responsible for their own host.
