Used PC universal? Tell you which used can not touch!

Xiao Bian always likes to be careful and sometimes trades some used accessories. The biggest advantage of second-hand accessories is the cheap price, but actually it is a trade-off. It's not desirable to blindly covet the cheap. Today Xiao Bian puts his own experience to talk with you.

Second-hand accessories which can buy?

CPU: CPU is the core of the computer, and it is also one of the components that are least likely to be damaged. Even if you use a few years old, you can still serve for a long time. Therefore, scouring a cheap CPU is very cost-effective, as long as the merchant security light up, generally there will be no problem. It should be noted that those engineering samples with insignificant ES must be carefully selected. After all, it is not the final version. There are some problems more or less.

Memory: The elimination of counterfeit and no-name products has a very low probability of memory corruption. When buying second-hand memory, pay special attention to whether the gold finger is normal and do not choose if there is trace of oxidation. After buying it, run it with a test tool such as aida64 for a few hours, and use it with no problems.

Chassis: Chassis is the second only to the CPU and memory in all components of the computer. Unless it is used in a violent manner, it will cause the chassis structure to be deformed. Otherwise, it can be used for a long time. For example, the chassis of Xiao Bian has been in service since 2006. The second-hand chassis is best deal with sellers in the same city - the main reason is that the weight is larger and the freight is more expensive. After the purchase, the diagonal force is slightly twisted, the structure of the chassis is not deformed, and nothing else needs special care. The other is that some brand machine inventory disassemble chassis is very value, with the quality of the price is better, but also an option (some need to change the connection).

Motherboard: The motherboard is not a consumable part, but special attention should be paid to the presence or absence of an infringement. At least the pre-purchase requires the seller to promise that there is no ill-health - some second-hand motherboards may have problems such as expansion slot damage, SATA interface identification problems, and USB expansion pins. The small problem that cannot be used, although it does not affect the overall use, is still quite awkward for the buyer.

Speaker: The speaker is one of the components that are not easily damaged, and the price is kept stable for a long time. The speakers used by Xiaobian are still R1000tc purchased in 2002 or so. It shows the durability of the speakers. When you buy a speaker check, just look at whether the speaker unit of the speaker is damaged or not, and if there is any noise in the background of the speaker, there will be no popping sound when the music movie is played.

Carefully choose to guard against

Graphics cards: Used graphics cards have always been more difficult to grasp, especially in the past two years, many graphics cards have been used for mining, leading to more difficult to buy second-hand graphics cards. According to Xiao Bian's experience, whether the used video card components are clean and tidy (hand-welded reworked goods may not be neat), and whether the back of the core is a new net, if the back is yellow, it indicates that the load is running for a long time and the mine card is very suspect. Then is the existing good and consistent (observe whether the existing particle number is unified). If the radiator cover is difficult to remove, the seller is required to first ensure the non-mining card, non-maintenance, at the same time to use the test software to run for a few hours to cycle, check whether the video card is running stably, the screen has no Huaping and so on.

Display: The update of the display is actually slow. A monitor can be used for a long time, and the elimination rate is not high. The second-hand monitor pays attention not to so-called work bag products, and some assembled displays appear as second-hand displays, and must be kept away from these assembled goods. In addition, before the purchase, be sure to negotiate with the seller about the bad points, bright spots, Xiao Bian suggested that the central area has no bright spots, you can not be too picky.

Keyboard: The keyboard is actually quite difficult to measure. Once Xiaobian wanted to classify it as a second-hand category. For the ordinary membrane keyboard, Xiao Bian really recommend buying a brand new one, the total price is not high, there is no need to save on this. The reason why it is also placed in the carefully selected category, mainly because of the mechanical keyboard of the fire in recent years, we all know that the mechanical keyboard life is very long, but do not think that the mechanical keyboard is almost no possibility of damage. On the contrary, many mechanical keyboard failures focus on two aspects. The first is the so-called stinky shaft, which means that the mechanical axis of a certain key is partially damaged (can be replaced and repaired), and the second one is mainly focused on the USB controller (comparison Less encountered). Therefore, before buying, be sure to communicate with the seller carefully, especially the problem of stinky axis, change it yourself or it is more troublesome.

Stay away from these second hand sinks!

If you can't touch the second-hand hardware, Xiao Bian must point out that these three things are: power supply, hard drive, and mouse. When you change the second-hand accessories, you can ignore them directly. Don't worry! First of all, the power supply, power supply as the hub of the computer power supply system must not be sloppy, especially the old second-hand power supply, it is difficult to ensure how the quality (such as the Internet cafes out of phase), power supply instability, the computer components no matter how good the protection mechanism is no good! In addition, many second-hand power supplies have been refurbished. Then there is the hard disk. The hidden bad sectors of the mechanical hard disk are hard to detect, and it is impossible to judge whether the defects are impaired in a short time. The SSD is slightly better, but there is also the problem of total write volume. But in any case, the most important part of the hard disk is actually the data inside. To ensure data security, the second-hand hard disk is free to talk about it. The last is the mouse, like the keyboard, the unit price is not high is one of the reasons why Xiaobian does not recommend the purchase of second-hand, the second is as a depletion of peripheral products, the total life of the mouse is actually very general, completely worthy of second-hand purchase, especially Is the mouse combo 666 problems, will not repair the partner bought is simply a kind of destruction.