In fact, no matter what kind of accessories you buy, in the end, it is still necessary to install the chassis, or power supply for the whole system to provide a safe and reliable power supply, if the chassis is not stable enough, the damage caused by high-speed operation of the hard disk is obvious, and the stability of the entire system will also have an impact, and the work of the computer accessories emitted by the radiation is harmful to the human body, the poor quality of the chassis is generally not anti-radiation design, will have a negative impact on the quality of the computer accessories. The poor quality chassis generally do not have anti-radiation design, will cause physical harm to the user. The importance of the power supply is not to mention, the use of low-quality power supply will not only reduce the performance of the accessories, serious damage may be more likely to other accessories, reduce the service life of the accessories.
In addition, the chassis power supply market is relatively chaotic, the price is relatively non-transparent, the consumer lacks the necessary understanding of the chassis power supply, which caused the chassis power supply into a black corner of the installation process. The more common is that the treacherous merchants often in the quotation on the use of the chassis power supply flicker, generally written P4 chassis power supply or ATX chassis power supply, did not specify the brand and model, and some of the chassis have specified the model is not marked with the corresponding power supply model, the use of this confusing means to earn a high profit.
A miscellaneous empty chassis price is generally less than 80 yuan, and a miscellaneous inferior power supply price is about the same, that is to say, a set of merchants recommended by the price of inferior chassis power supply purchase price may be in the 150 yuan or so, and for this kind of product, the general business to the consumer's price offer is between 200 to 250 yuan, the profit is very amazing.
Fortunately, this situation has aroused the attention of some consumers, but due to the media on the chassis power supply is not very important, the network can be found on the magazine about the chassis power supply guide and analysis is relatively small, resulting in some of the computer is not very familiar with the consumer does not know how to go to choose a suitable power supply. Below, I will work with you from a practical point of view, *** with the discussion of how to choose the right chassis power supply.
⊙How to choose a chassis
The chassis does not have much technical content, inferior chassis and quality chassis is mainly the difference between the material and workmanship. Before discussing how to choose a chassis, let's first understand some of the basics of chassis.
Chassis from the structure can be divided into AT, ATX, MicroATX, NLX, WTX (also known as Flex-ATX), etc., and the market is common in fact, ATX, MicroATX two, which is commonly known as the big chassis and small chassis. Bigger chassis can accommodate more accessories, generally have two hardware bits and more than three optical drive bays, and have a wider internal structure, while smaller chassis generally provide only one optical drive bay and one hard drive bay, and have a compact internal structure, but take up less space, more suitable for some home users.
If the user adopts a standard ATX board type motherboard, it is best to use a large chassis, some small chassis can not be installed, in addition, the user should also consider the number of their own accessories, in general, if the accessories are more, it is best to use a large chassis, and due to the large chassis of the interior is more spacious, the internal air circulation will be more favorable, conducive to heat dissipation, a small chassis is usually need to help the chassis fan to help dissipate heat. In terms of price, generally speaking, the price of a small chassis is more expensive than a large chassis.
The material of the chassis is also very important, which is an important factor in determining the price of the chassis. Chassis in front of the plastic panel is often contact with the user's place, this part of the material is the most common for the ABS engineering plastics and ordinary plastics, ABS engineering plastics with impact resistance, toughness, non-toxicity, not easy to fade to maintain the appearance of the color of the characteristics of the color for a long time. And ordinary plastic use a long time will be yellowing, aging and even cracking. Price is of course ABS engineering plastics are more expensive. Identify the two kinds of plastic methods are relatively simple, in general, after the certification of the ABS material will be printed on the plastic "ABS" words, the user does not have to worry about that there are unscrupulous businessmen to ordinary plastics printed on the ABS word when the high-grade products to sell, there is no such situation on the market for the time being, and the two kinds of materials in the feel, visual The feeling of the two materials in the hand, the visual sense are more obvious, easy to judge.
In addition to the panel, the most important chassis or steel plate, the more common is the cold galvanized steel, of course, there are now some high-priced chassis using a full aluminum alloy or fully transparent, these products are still relatively small, this article will be ignored for the time being. Cold galvanized steel also has a high-quality and low-quality points, in this regard, the user can observe its thickness to identify, thicker cold galvanized steel conductivity is relatively high, you can shield some of the electromagnetic radiation in the chassis, to prevent electromagnetic radiation and interference. The thinner steel plate made of chassis solidity is very poor, the chassis bearing capacity is very low, easy to deformation, very easy to lead to card slot positioning inaccurate, so that the installation of the card is difficult.
There are also some inferior materials made of tin, not cold galvanized process, only in the tin inside and outside the spray on a layer of paint, such products in the use of a short period of time after the phenomenon of air oxidation, the most serious is that it is not at all anti-electromagnetic radiation function. Users who want to test the radiation protection function of the chassis, you can put the chassis to work next to the CRT monitor, if the CRT monitor appears to be a serious jitter, it shows that the chassis radiation protection function is very poor.
In addition to these, we have to pay attention to the appearance of the chassis in the purchase of the chassis, after all, the chassis is placed outside the person to see, the business-type can be considered to the main stable, Internet café to have anti-theft design, the family is the pursuit of light practical, and some of the better chassis in the design of the very humane, such as the use of tool-free disassembly chassis, tool-free disassembly of the CD-ROM drive card position, and so on. There is a more important is the chassis cooling, this depends on the user's configuration, if the user uses a high-frequency or dual-core CPU, coupled with high-end discrete graphics cards and so on, that the heat of the machine will be very large, such users are best to use a large chassis, and the chassis required to have cooling fans and other cooling facilities. For some low-end integrated platform, the use of small MicroATX chassis is also a good choice. In addition, some such as interface design should not be ignored, such as USB ports, audio interfaces, etc., whether the design is reasonable will also be related to the usability of the chassis. In addition to the choice of materials to be good, there is no good workmanship is not. Many users often have such an experience, just change a graphics card, the card slot is dead on the right, once the violence to solve the problem, accidentally also cut the hand. In fact, this is the workmanship of the chassis has a problem. Excellent workmanship of the chassis steel plate edges generally do not have burrs, sharp mouth, burrs and other traces of all the exposed edges are folded to deal with, do not underestimate this layer of folded edges, low-quality chassis in order to save material, this layer of folded edges to be omitted, in addition, high-quality chassis card slot positioning is also quite accurate, will not be a part of the accessories to install on the wrong or misplaced, in addition to the box should be supported by a bar in order to increase the case of the Solid degree. If the user installs the machine and sees that the master has to be violent in order to align the motherboard graphics card to the bit, it means that the workmanship of this chassis is certainly not good.