1. Before buying: First, you should know the details of the parts you want to buy through newspapers, magazines and the Internet, so as to know the price and specific performance indicators of the parts in advance. Then try to choose a reputable merchant to buy. In most cases, the principle of "one point for one price, one point for one product" is correct. Don't blindly covet petty advantages, so as not to be used by profiteers to sell fake and inferior parts. At the same time, it is best to invite friends who are familiar with computer hardware to assist in reference and identification.
2. In the purchase process: The first measure that can effectively reduce the possibility of buying counterfeit goods and parallel imports (goods flowing out of abnormal channels) is to choose to buy boxed products with clear and complete Chinese logo and meticulous and standardized packaging. The marks on the packing box shall include the product name, model, performance parameters, brief introduction, origin, serial number and electrical safety signs. Relatively speaking, bulk products are more likely to be faked. So, unless you know all the details of computer accessories, try to buy boxed products.
Secondly, carefully observe whether the materials and components used in the product are of good quality and whether the structure is firm and compact. If the visual inspection can pass, then use the latest version of Hwinfo and other excellent hardware detection programs to test, and it is best to eliminate possible problems before leaving the store. Then, check whether the accessories (including gifts) and related materials (such as drive discs) listed in the packing list or instruction manual attached to the box are complete.
3. Before payment: If you decide to buy products, don't forget to ask the dealer to issue an invoice (receipt) before taking out your wallet to pay, and indicate the details and contents of the purchased products on the invoice (receipt) or warranty; It should also be noted that at present, some merchants with ulterior motives will play word games on invoices or letters of guarantee in order to evade their responsibilities in the future, so keep your eyes open and read invoices or letters of guarantee carefully to avoid unnecessary service disputes in the future.
Second, the eyes of common computer accessories distinguish between true and false
1、CPU
It is one of the most important parts in a computer. At present, the CPU on the market is mainly divided into two brands: Intel and AMD, among which the CPU produced by Intel is divided into Celeron, PII and PIII. The CPU produced by AMD is also different from K6-2, K6-3 and K7, with great differences in appearance, performance and price. Because the technical content of CPU is quite high, it is impossible for counterfeiters to produce CPU by themselves. They usually use remarks to mark the low-frequency CPU as high-frequency for sale in order to make huge profits. Because the original working frequency (or voltage) has been greatly improved, the CPU has been overloaded. If friends who are kept in the dark overclock further, then with the passage of time, the serious electromigration caused by overclocking may lead to the decrease of the stability of the machine, and the problems such as crashes and illegal operations will gradually increase. Using this CPU for a long time without good cooling measures will lead to overheating, crash and system crash. When buying CPU, if you find abnormal damage or other clues in the box, you should pay more attention. Observe the CPU carefully after unpacking. Be alert if the handwriting on the CPU surface is not clear enough. In addition, you can install a CPU to test its working stability by playing large 3D games for a long time. In addition, it is also an effective and good method to test with CPU professional test software.
Identification method of (1)pii pu
One way to distinguish whether PIICPU is Remark is: first, look at whether the outer packaging carton is clearly printed, and the font at the serial number of the fake CPU is obviously thicker than normal, and the color is unusually gray; Another feature is that the genuine plastic packaging film is soft and elastic, and the INTEL watermark on it is difficult to erase because of the special process. The plastic packaging film of counterfeit products is brittle, and the watermark on it can be easily erased. Then see if the plastic package of CPU is damaged normally or sealed by secondary plastic package; The last measure is to use the special test software ctp2info for PII, which can measure the main frequency, bus speed and ECC function of PIICPU.
(2) Cheating skills of Intel boxed CPU
First of all, the original Intel CPU box is printed with translucent Intel logo on the plastic film, while the number of counterfeit Intel logo printed on it is much more than the genuine one. As long as you compare it, you can see the truth.
Another effective method is to observe the back of the original packaged Intel CPU box. There is a black dividing line between the upper and lower boundaries of multilingual text printed with product introduction. If it is a genuine CPU, if you look closely, you can find that some black lines are actually made up of the "INTEL" logo, and the font is small but clear. The packaging of fake goods is just a black line.
(3) Use PIII in bulk with caution
At present, a batch of low-quality bulk PIII has entered the market. These chips of bulk PIII are very fragile, and a slight touch will cause the system to fail to start or crash frequently. This batch of OEM commodities entered the market through abnormal channels. Because Intel is only responsible for the quality of boxed products, it is not responsible for the quality of this bulk PIII. The general feature of this bulk PIII is that the price is one or two hundred yuan cheaper than that of the ordinary PIII in the original package. Therefore, it is better not to be greedy for petty gains.
Another magic weapon is to use the CPU test software fidCHS05.exe (downloadable), which can measure the processor frequency and bus frequency of PII and PIII, including factory frequency and current frequency.
Step 2 remember
Memory stick consists of chip, PCB circuit board and some resistors and capacitors. There are few appearance marks, and most of them have no formal packaging. It is difficult for ordinary consumers to judge its advantages and disadvantages from the appearance alone, so they should be more cautious when purchasing. The common method of memory fraud is to pass inferior goods off as famous brand products. Memory chips need to go through three steps before leaving the factory: pretreatment, post-treatment and inspection. In the previous process, the silicon wafer was cut into small wafers, and a simple EDS test was carried out to complete most of the functional tests of the chip. I/O (input/output) setting and wafer protection in post-processing; During the inspection process, the whole chip is inspected comprehensively. Only memory chips that pass this process are qualified products, but the inspection process takes the longest time and the cost is high. In recent years, some big manufacturers only do pre-processing and then sell their primary products to other semiconductor manufacturers for post-processing. However, after finishing the post-processing, these semiconductor manufacturers sell the chips to some memory chip manufacturers without carrying out the inspection process (or only carrying out a very simple inspection) or putting any signs on the chips. Some unscrupulous businessmen buy memory chips through various channels, hire migrant workers to make memory chips in manual workshops, and then put some famous trademarks on these chips for sale. The quality of these fake PCB boards is not good, and the workmanship of the whole memory chip is also very rough. At the same time, due to the lack of testing means, the product quality is unstable, and it can not meet the requirements of faster and faster CPU, which is easy to cause failures. One of the characteristics of this fake is that the price is usually tens of yuan cheaper than the genuine one.
Memory sticks, like CPU, have their own rated working frequency (for example, PC 100 and PC 133 are often marked on memory sticks, indicating that this kind of memory can work stably at the external frequency of 100MHz and 133MHz respectively), and the memory can often work with higher frequency. Most PC66 memory chips can work stably at the external frequency of 100MHz when CAS=3, and some high-quality PC 100 memory chips can also work at the external frequency of 133MHz (PC 133 standard). Some unscrupulous merchants use Remark to polish the logo of memory chips, such as polishing the logo of PC- 100 memory into PC- 133, and then rewriting some contents of electronically erased memory, and then selling it at a higher price for profit. When we buy memory, we must first look at the logo of the memory chip, and the logo of the genuine chip is generally laser etched and has a deep notch. However, the polished surface of the memory stick is often smooth, and the logo on the surface is mostly printed. Secondly, after installing the memory stick, the machine should run some memory-intensive applications, such as 3DS, AutoCAD and so on. If the memory module is counterfeit, some abnormal errors may occur.
Nowadays, most of the SDRAM we can buy are made by LGS, Hyundai or Samsung. Then, is the memory stick marked -7(X) 7ns(PC 133)? First of all, at present, Samsung's KMxxxSxxxxBT-G7 supports CAS=3 and works in 7ns. Secondly, 7K and 7J of LGS are just ordinary PC 100 memory, which can't support 7ns, just as some merchants said. The memory of modern electronics is PC 100 with ATC, but not PC 100 without ATC.
Identification of Forged Gold Bars in Qiao Feng
Because Qiao Feng gold bars adopt unique BLP patented packaging technology, use six layers of boards, and there is only one model of PC 133, it is arguably more difficult to forge. However, fakes still appear: the handwriting on the surface of the fake chip is blurred, and the quality of the circuit board is obviously worse than the real one. In addition, the fake firewood wind gold bars are only packed in transparent plastic, unlike a real paper box. In addition, the name and number on the chip have polished marks, and the words are obviously printed, not laser etched. The handwriting on the fake SPD chip is also blurred, and the color of PCB circuit board is darker than the genuine one.
Identification of counterfeit products in KingMax shengchuang memory
Fake KingMax memory sticks with KingMax logo, which looks like high-quality Shengchuang memory. In fact, it is very easy to distinguish the true and false KingMax memory: Shengchuang adopts advanced TinyBGA packaging technology, which is different from other PC 100-SDRAM memories (TSOP packaging). On the surface, the pins of the chip should be invisible, but the fake KingMax memory uses the traditional TSOP package, so it can be seen clearly. Moreover, before the TSOP packaged memory produced by KingMax, there was no logo marked with KingMax on the chip. In order to prevent buying fake KingMax memory, it is necessary to identify whether the memory chip is packaged in TinyBGA.
3. Motherboard
Motherboard plays an important "cornerstone" role in a computer, so be more cautious when buying. For the motherboard, the common means of counterfeiting is to directly confuse the fake with the real, shoddy and so on. Pay attention to observe whether the performance and model of the product meet, whether the workmanship is fine and standardized, how the wave soldering process is, and whether the components on the board are complete as new. Secondly, it is necessary to directly test the quality of the board and its overclocking stability. Finally, check whether the attached drive disk (including the given application software CD), wiring and other accessories are complete.
Authenticity identification of gigabit motherboard
At present, there are counterfeit Gigabyte motherboards and "parallel imports" entering the market through illegal smuggling. In order to make it easier for users to identify the authenticity of products, Gigabyte Company announced how to identify the authenticity of products: First, take a look at "fakes". "Fake goods" means that some unscrupulous manufacturers cheat consumers by copying Gigabyte motherboards or passing off motherboards of other brands as Gigabyte products. These motherboard products usually use some low-grade materials, the manufacturing process is rough and the quality is not guaranteed. Taking Gigabyte GA-6VXE as an example, from the product appearance:
A. At present, the version number of GA-6VXE motherboard PCB is REV2.2, but "fake" is REV2.3；;
B. Motherboards produced in Gigabyte have all met the requirements of PC99 specification, so serial port, parallel port and PS/2 keyboard and mouse interface are all color interfaces, while "fake" products generally do not use color interfaces due to cost considerations;
C, Gigabyte board has always chosen high-quality materials. Motherboard slots and electronic components are made of high-quality products of well-known brands (such as Foxconn). ), with abundant materials and superior manufacturing technology, while "fake goods" use inferior materials;
D. Gigabyte motherboards generally use high-quality batteries from Sony and MAXELL, and Toshiba batteries are used for "fakes";
E. Gigabyte motherboards generally adopt the "color recognition" IDE interface, with one slot white and one black (if there is a motherboard with ATA66 function, one blue and one white), while "fakes" are all black;
F the instructions posted on Gigabyte's main board are all in Chinese. The pictures of the main board on the back cover are very clear, and the nuances can still be distinguished by the naked eye. The descriptions of "fakes" are all in English, or the printing quality is poor.
From the point of product packaging, Jixi motherboard products are covered with thick anti-static bags, and a layer of foam is placed at the bottom of the packaging box for protection. The main board packaging box is sapphire blue, with bright colors and good printing quality, especially the small characters on some small icons (such as ISO900 1) are very clear. The words on the packing box are simplified Chinese, the packing box is made of good material, the folding line is straight, and the box body is not easy to crush.
Next, let's look at "parallel imports". "Parallel imports" are not "fakes", but products that enter the market through illegal channels. The difference between it and the real thing is that:
A, product serial number and quality inspection label should be posted on the genuine motherboard. You can see that there are some white long-strip labels (product serial number labels) printed with NXX XXXXXXXXX, 10 digits, and there is a strip identification code above the digits. Similarly, there is the same label on the outer packaging of the motherboard, and the identification number is the same, while there is no label on the "parallel goods" or the label is deliberately torn off;
B, the instructions attached to "parallel imports" are generally in English or Chinese, and the printing quality is poor. The genuine products are in Chinese;
C, "parallel imports" generally do not have packaging boxes or use poor quality packaging boxes, and genuine products have packaging boxes with good quality;
D, "parallel imports" sometimes have original packaging boxes, but the printed words are in English, while the genuine products are simplified Chinese.
The performance of "fake" and "parallel" is quite different from that of genuine products, and the quality of the motherboard cannot be guaranteed. Moreover, most of the "parallel imports" are specially simplified for a certain manufacturer. There are many limitations in the selection of peripheral devices and their functions are not perfect, so many problems will occur after users use them.
Step 4 show
As a big piece of computer, monitor is also a big consumer of radiation in computer, so we should pay special attention to its safety performance when purchasing monitor. The lower the radiation value, the better. It is best to buy products that have passed TCO95 certification. In addition, we should pay attention to the quality of the display tube and observe the display effect (especially when the screen is completely white, it is easy to expose some shortcomings in the display performance) to prevent profiteers from selling inferior products with B-class tubes as A-class tubes. Every monitor produced by a regular manufacturer has a nameplate on the back or bottom of the monitor, which clearly records all important information of the monitor, such as product model, voltage, current, serial number, FCC ID, place of origin, production date and certification standard (remember not to buy monitors without nameplate). Monitors of brands such as Meg, Sony, Mitsubishi, etc., all monitors with TCO certification marks are real TCO certification monitors. In addition, attention should also be paid to the appearance quality, heat dissipation design and various adjustment functions of the display. Because the monitor is not easy to upgrade, it is best to buy brand-name products, which not only protect your eyes, but also get good after-sales service.
5, optical drive
For CD-ROM drive, there are many methods of counterfeiting, so don't be easily confused by the beautiful packaging box of CD-ROM drive. It mainly tests its workmanship, speed, stability, noise resistance, dust prevention and disk reading ability. When testing, you can try some scratched discs to see if their reading ability is normal and whether their reading speed meets the requirements.
(1) Acer optical drive to distinguish between true and false.
Acer optical drive has a good performance in error correction ability, compatibility, stability and service life, and occupies an important position in the optical drive market. Some unscrupulous manufacturers copy and sell Acer's original products, which seriously damages the rights and interests of consumers and original factories. In order to prevent users from being fooled when buying Acer optical drives, BenQ announced the basic identification methods of genuine and fake Acer optical drives as follows (and stated that it would not provide after-sales service for counterfeit Acer optical drives): The characteristics of these counterfeit optical drives are:
A. The volume on the left side of the genuine Acer CD-ROM drive panel is adjusted to two digital volume control keys (button type), while the fake one is knob type; Moreover, the keys of genuine Acer CD-ROM drive are rectangular, but fakes are not.
B, genuine packaging has the "crocodile" logo, while fake and parallel imports have no "crocodile" logo.
C. The outer packaging of the fake goods is modeled after the outer packaging of the genuine Acer optical drive, but the place of origin is not marked. And the accessories inside are not packaged, there are no instructions, and there are no screws.
(2) ASUS CD anti-counterfeiting
Real data is read at 34 times the speed, and false data is read at 20 times the speed; Authentic length 197mm, fake length 207mm in length; There is no registration mark next to the ASUS logo on the genuine panel, and there is a registration mark next to the ASUS logo on the mask panel. The genuine panel indicator light is oval, located in the upper right position, and the fake panel indicator light is round, located in the left position of the panel; The genuine power failure emergency hole is located at the upper right of the center of the panel, and the fake power failure emergency hole is located at the left side of the panel; The right slot of the genuine volume adjustment knob panel is made of the same material as the panel, while the fake volume adjustment knob is larger and made of different materials. According to the assembled computer configuration network, the genuine bar code has a white background and the fake bar code has a yellow background; Authentic workmanship, high-grade materials, fake rough workmanship, made of hard plastic; There are no holes on the genuine CD, and there are many round holes and concave holes on the fake CD. The baffle above the genuine CD-ROM connector is a metal plate integrated with the shell, and the baffle above the counterfeit CD-ROM connector is a black plastic plate separated from the shell; The genuine headset logo is located above the jack, and the fake headset logo is located on the left side of the jack.
(3) Samsung CD anti-counterfeiting
There is a Samsung logo on the mask of Samsung 32X optical drive, but there is no Samsung logo on the real product. There are 32X MAX words on the left side of the fake panel and 32X MAX words in the middle of the genuine Samsung CD-ROM drive panel; There is a separate serial number on the label of the fake.
(4) Yuanxing CD anti-counterfeiting
At present, there are two kinds of 32X Yuanxing optical drives: one is numbered 30 1, and the other is numbered 302, which improves the noise of 30 1, but its performance is not as good as 301; In the future, an improved version of 302 will be launched, combining the advantages of 30 1 with 302.
(5) Philips optical drive anti-counterfeiting
Identification of the authenticity of the 32X Phiips optical drive: A. The words Philips are written in the upper left corner of the outer packaging color box of the real Philips optical drive, not Philips OEM or Philips MAX. B. The packaging color box of CD-ROM drive is bright, delicate and easy to read, while the fake packaging color box of CD-ROM drive has rough printing and dark color. C Philips 32X CD-ROM drive has the word Philips in black on the door. There are two round buttons, an earphone jack and a volume control on the CD-ROM drive.
There is generally no word Philips (or Philips OEM) on the drive panel of a fake CD-ROM drive, and the play key and on-off key on the fake CD-ROM drive panel are not round. D. Philips 32x optical drive has a metal logo on the front, and the word Philips is printed on the upper right of the metal logo, and the model PCA328CD is printed. The bar code with part number and serial number is attached under the metal sign. Fake optical drives generally have no bar code or the bar code is printed instead of pasted, and the model is not PCA328CD. E. There is a yellow label on the back of the CD-ROM drive, which bears the product model, product name, manufacturer, address and place of origin of the CD-ROM drive. Generally, fake optical drives don't have this yellow label. 6. The box of Philips 32x CD-ROM drive also contains an instruction manual, a guarantee, a Philips peripheral product introduction and a CD-ROM floppy disk, but these accessories are not complete. F the test software provided by Philips can also be used to identify the optical drive.
Identification of the authenticity of 40X Philips CD-ROM drive: the genuine 40X Philips CD-ROM drive is packaged in a large color box with the word Philips in the upper left corner, and the fake product is in bulk or marked as PHILIPS-OEM or PHILIS-MAX；; ; The genuine packaging color box is bright, delicate and clear, while the fake color box is rough and dark. The shockproof bracket in the genuine box is made of recyclable paper, and the shockproof bracket in the fake box is made of foamed plastic or kraft paper. The genuine panel has the words Philips in black, and the fake panel has no words Philips or Philips -OEM or Phyllis -MAX; . The genuine volume control key is to the left in the middle, and the fake volume control key is near the earphone hole; The genuine product has a metal label on the top of the drive, the word Philips is printed on the top right of the metal label, and the model PC408CD is printed, and the bar code is attached below the metal label, while the fake product does not have these marks; The genuine product has a yellow label on the back of the drive, which is printed with the product model, product name, manufacturer, address and place of origin, while the fake product does not have the above characteristics or the characteristics are incomplete; When the genuine product is opened, the Philips optical drive and product model PCA408-CD can be detected, while the counterfeit product cannot detect the specific optical drive name and model.
6. Graphics card
In the current 3D graphics card market, nVidia, 3Dfx, Matrox, ATI and S3 are constantly introducing their own new graphics acceleration chips, and the 3D heat wave is one after another, which is very lively. Because there are many kinds of 3D graphics chips, even the same series of chips have different technical specifications. In order to dissipate heat, the surface of display chip is covered with heat sink or fan, which not only brings trouble to users to identify the specific model of display chip, but also gives unscrupulous merchants an opportunity.
Authenticity identification of TNT2 series graphics cards
TNT2 series graphics cards have relatively high profits, so they are the focus of profiteers' counterfeiting. There are four product models-TNT 2Ultra, TNT2, TNT2 M64 and TNT2 Vanta, with different memory frequency, core frequency and chip size. TNT2 Ultra and TNT2 chips are packaged in 496 pins, and the chip size is large; TNT2 M64 and Vanta are only packaged in 320 pins, so the chips are smaller. In addition, TNT2 Ultra and TNT2are 128-bit acceleration chips, while TNT2 M64 and Vanta only have 64-bit memory channels. Although the chip frequency and memory frequency of TNT2 and TNT2 M64 are exactly the same, the unit price difference between TNT2 M64 and TNT2 is nearly 50%. Therefore, unscrupulous merchants can easily use TNT2 M64 as the display card of TNT2 chip, deceiving users who don't know these characteristics and making high profits.
Since nVIDIA's TNT2 and TNT2 Model64 chips are marked with the words "Liwa TNT2" or "Liwa TNT2 M64", it is best to directly observe and display the chip identification when purchasing. But usually the radiator and the chip are stuck tightly, so take a real TNT2 graphics card for comparison and observe the number of pins on the back of the graphics card to judge. If the chip area and pin count are not as good as the real TNT2 graphics card, then it must be TNT64 graphics card.
In addition, the card overclocking software patch panel can also help users identify the authenticity of TNT2 and TNT2 Model64. After running the patch panel, you can know the specific model by observing whether the 3D acceleration chip in the software information bar is 128 bit or 64 bit.
True and false G400
The biggest difference between the genuine G400 and the fake is that the genuine G400 is packaged in Chinese with the logo of "MGA for Chinese mainland". On the side of each packing box, there is a label marked with the words "Unification" or "Wuhan". "Unification" means that products are sold all over the country, while "Wuhan" is exclusively sold by Zhongke Group in several big cities to avoid cross-regional sales of products. In addition, it is marked with a set of unique numbers, which are exactly the same as the labels attached behind the "Product Quality Guarantee" and "Product Warranty" in the box. There is also a "Advanced User Manual" in the box, which introduces in detail the possible faults and solutions of users during use. Another difference is that the words "Big Evil 16M" or "32M" are marked in bold in the upper left corner of the genuine packaging box, and the color is gold, but not on the counterfeit packaging box. The genuine G400 also enjoys 3 years of free replacement and technical support, while the counterfeit goods do not have this service. Please pay attention when buying.
7. Sound card
Identification of Monty S9O's True and False Sound Card
There are a lot of S90 fakes on the market now, and there are several different versions of fakes on the market. Generally speaking, it is guaranteed by Hengjin Electronics Company, and ELNA capacitor is used. Yin He should be genuine. Some S90 sound cards look very poor in quality, and the CD of the CD-ROM drive is printed very vaguely, and there is no manual. The reference methods to identify the true and false Monty S9O are as follows: a. The fake PCB circuit board is rough in workmanship, dull in paint color, poor in plate quality, excellent in real PCB material and round in paint color. B there is an expansion opening in the upper left corner of the front of the card. The fake is an 8-pin solder joint, and the genuine is a 16-pin solder joint. C the word diamond on fake goods is slightly transparent and fuzzy, while the word diamond on genuine goods is clear, bright and opaque. The fake capacitor is black, and the genuine one is yellow and black. D, the bar code marked on the back of the card, the fake goods are fuzzy and obviously have overprint traces, while the genuine goods are clear and black and white. E. Genuine products have the warranty card of Guangyuan Bank, while fake products are either not available, or the paper on the card is very thin, with overprint or printing marks.
8. Chassis and power supply
Chassis and power supply are important guarantees for computer security. In a computer, although the price of chassis and power supply accounts for a small proportion, there is more room for profiteers to cheat here. The inferior chassis is manifested in the following aspects: using inferior steel plate shell, the thickness is seriously unqualified and it is easy to deform, and it is easy to hurt hands without crimping treatment; The internal dimensions and specifications of the chassis do not meet the requirements of the national standard, and the heat dissipation is poor; The layout of indicator lights, buttons and wiring is unreasonable, inferior accessories are used, there is no safety sign, and there is no motherboard fixing screw. Brand products should be given priority when purchasing.
When purchasing a power supply, we should mainly pay attention to the power index, appearance quality, fan performance of the power supply, the workmanship of the power supply circuit board, and whether there is a filter device and overvoltage protection. Secondly, we should pay attention to whether the signs and signs are perfect, and whether there are signs of various technical parameters, origin introduction and safety specifications. For ordinary users, due to the lack of necessary testing conditions, it is best to buy high-quality brand power supply.
9. Keyboard and mouse
As the most commonly used and important input device in computer system, keyboard should naturally be paid attention to.
A good keyboard can not only improve users' work efficiency, but also protect users' health.
The quality of the keyboard is easy to identify from the appearance, because the exposed part of the high-quality keyboard is finely processed; If you open the keyboard, you can also find that the internal circuit board technology of high-quality keyboards is also very fine, and some high-quality keyboards even use thicker steel plates at the bottom to increase the rigidity of the keyboard; However, the process of the internal circuit board of the inferior keyboard is relatively rough, and the base is plastic. In addition, judging the quality of the keyboard from the folding support feet at the bottom of the keyboard, usually a high-quality keyboard will provide two or even three sections of angle adjustment, while most inferior keyboards only have a single section of angle adjustment.
The letters and numbers on the keys of the keyboard are generally etched by oil laser. Among them, the letters or numbers on the keys will soon become blurred or even disappear because of friction after being used for a period of time. The laser etched keyboard does not have this problem, and the score is deep and clear. If you touch the surface of the key with your hand and feel obvious concave and convex feeling in letters or numbers, you can determine that the keyboard is laser etched, otherwise it is ordinary mimeographed.
When purchasing a keyboard, carefully check the manufacturing process and feel, whether the key cap is loose, electrical performance and interface problems. As for the mouse, because most of our operations in Windows are done through the mouse, it is wise to choose a real brand mouse with good quality and feel.
Acer keyboard anti-counterfeiting
At present, the identification methods of counterfeit Acer 52TW keyboard in the market are as follows: A. The letters, numbers and symbols on the key cap of the real Acer keyboard are all printed by laser, and the fingers can feel the concave and convex feeling of laser engraving when touching, which is not easy to wear. The fake Acer keyboard is mimeographed and feels smooth, and the handwriting will wear out after a long time. B, the real Acer keyboard is laser printed, and the fonts on the keycap are slender and elegant. The mimeographed font of the fake Acer keyboard is thicker. C Due to the advanced technology of laser printing, the real Acer keyboard can also handle details freely. For aesthetic reasons, the center of the arrow on the direction key is carved into a hollow by laser. However, the mimeograph technology of fake Acer keyboard can't be done, so the arrow centers of all direction keys are solid. D the serial number on the real Acer keyboard box and the label on the back cover. Each keyboard has a unique number, that is, the serial numbers of any two real Acer keyboards are different, while the serial numbers of fake Acer keyboards are the same.