How to distinguish the authenticity of computer hardware

How to distinguish the authenticity of computer hardware

First, visual inspection: identify the hardware itself.

1. From the packaging anti-counterfeiting identification

When buying hardware products, the first thing is to look at the product packaging. Take Kingston's memory as an example. From June 65438+ 10/0, 2005, all products distributed by Kingston in China will adopt brand-new "nano-refraction" anti-counterfeiting labels. It is said that this anti-counterfeiting label similar to laser technology will never be faked, and this anti-counterfeiting label will replace the fake short messages that have been used for two years. For other products, such as motherboards, graphics cards, CD-ROMs, etc. Due to the use of outer packaging, there are generally 800 and other free telephone numbers on the box, through which you can ask whether the products of the manufacturers are genuine or not. For example, Sony's magneto-optical storage products (CDRW, DVDRW, etc. All the products sold in China are authorized by the blue anti-counterfeiting label of China Quality Inspection Association. The label consists of two layers of stickers. Uncover the surface of the label and you can see the anti-counterfeiting code on the second sticker, but there is no anti-counterfeiting code on the labels of parallel imports and fakes. Immediately after purchase, you should uncover the surface layer and call the toll-free number 8008 106046 on the anti-counterfeiting label to check the authenticity of the purchased products. In addition, Sony's licensed products are affixed with the anti-counterfeiting label of "Sony original Lifu agent". This is an important way to identify licensed goods, parallel imports and fakes (special reminder: counterfeit parallel imports are also labeled with anti-counterfeiting trademarks).

2. Look at the authenticity from the chip itself

Nowadays, many JS are too serious about product packaging, and many users buy bulk products (such as bulk CPU, memory, hard disk, etc. ), so users can't identify themselves through the outer packaging, so they should identify themselves from the quality and technology of the hardware itself. For CPU, memory and other hardware. Because its core chip is exposed, it is often the easiest product for JS to polish or fake. We can easily use eye recognition. Take CPU as an example. Many users bought Intel P4 3.0G box products, paid for the goods, and even took a spare CPU home.

Let's take a look at this P4 3.0G boxed CPU. In the label of the product packaging box, the secondary cache is marked as 5 12K, which is completely correct, but when we open the package and look at the surface of the CPU, the secondary cache is marked as1m. As we all know, P4 3. Looking at quality from PCB layout.

For graphics cards, motherboards and other products, because the core is covered by the heat sink, it is impossible to remove the heat sink when purchasing. In addition to the above methods, it is also an important means to identify the quality of PCB layout. For example, graphics cards with the same specifications, models and chips use public PCB design, and some fakes use non-public PCB design because of cost control. "Non-public board" is more often just a product born for "low cost" or publicity needs. For example, because many people's understanding of PCB will be willing to stay at the level of "N-layer PCB for a certain graphics card" and "The more PCB layers, the better", JS has a chance ... and a graphics card obviously only uses 4 layers of PCB, JS has to say that this graphics card uses 6 layers of PCB.

To identify the quality of PCB, we have to start with the details. For example, by observing the oxidation around blind holes and solder, everyone can know whether the material of PCB is good or bad; By observing the transparency of PCB edge, we can know the approximate thickness of PCB. Of course, if the merchant can provide a variety of different graphics cards in kind, then the appraisal work will be easier! For example, the low-pass filter circuit that can't be ignored, the low-pass filter circuit (generally, the low-pass filter circuit is close to the VGA output interface of the graphics card and consists of many capacitors and inductors to improve the stability of the display signal and finally obtain a high-quality output picture), few consumers pay attention to it, but many graphics card manufacturers squeeze profits from him.

Second, the feel method: the feel is also very important.

For graphics cards, motherboards, power supplies and other products, you can also feel them with your own hands, that is, you can know what is going on by weighing the products. For example, the motherboard or graphics card, genuine large board design, high specifications. For friends who can't identify the components themselves, it is impossible to identify the fakes from the appearance, because the fakes are also designed with large boards, but as long as you compare them, the fake motherboard in your hand is very light in weight, while the genuine one is very heavy. This is because the genuine products use good quality PCB and components, while the fake products use thinner PCB, and the components on the motherboard are also inferior, even omitting some unimportant components, so of course it is much lighter. Generally speaking, the edges and corners of a good PCB are smooth (not hurting hands) and feel comfortable. Holding the board in your hand feels heavy and textured.

Another example is the power supply. At present, the thickness of the steel plate of the power supply shell is generally 0.6 mm or 0.8 mm. The power supply must feel heavy when held in your hand, especially for some power supplies that have passed the safety regulations or certification, some circuit boards and parts will be added to increase their safety and stability, and the weight will certainly increase. Moreover, according to the current mode of production, the greater the power, the thicker and denser the coils and other components inside, so the heavier the weight should be. Although it cannot be arbitrarily said that the heavier the power supply, the better, but the light weight is definitely not good.

Third, the tool method: test the real quality with software.

Although the above methods can greatly prevent buying fakes, these are all theoretical "on paper". If you want to know whether the product you bought is genuine or not, or whether the performance is as good as the business says, it will be clear at a glance to test it with some professional tools and software (the hardware products in the following software test are for your reference only).

1. Test CPU performance.

In the whole PC system accessories, CPU undoubtedly plays a core role. Many friends don't know enough about CPU. They mistakenly think that the higher the CPU frequency, the better the price and the higher the performance. In particular, they have no deep insight into some polished and fake CPUs. Often an expensive "core" buys home, either because of playing games or because the speed of rendering animation is not satisfactory. Let's unveil the real veil of CPU, so that you won't be blind when purchasing CPU.

If it is an Intel processor, you can use the processor frequency ID utility, which is a tool developed by Intel for yourself. It uses the frequency determination algorithm to check the internal data in the processor, compares the data with the detected working frequency, and finally informs the user of the overall system state. Run the processor frequency ID utility, and its main interface will appear. From here, we can see that the CPU is Intel Celeron IV 1.7G, and the system bus frequency is 400Mhz. "CPUID data" shows the detailed parameters of CPU, such as processor characteristics, cache information, etc.

2. Test memory performance

For ordinary users, there is no ability to identify fakes and inferior products in memory, which often leads to machine interruption, screen pause and slow down. Therefore, how to test your memory performance and master the memory performance will help us understand the memory requirements of the game, thus making you invincible in the game competition.

Take Samsung DDDR333 memory as an example, run SiSoft Sandra, select the "motherboard information" option in the main interface and run it, and you can get the memory-related information (as shown in Figure 22). From this we know that this is a 256MB PC2700(DDR333) memory. When the memory works at the external frequency 133MHz, the default CAS delay time (CL) is 2; When the CL value is 2.5, the standard operating frequency of the memory is 167MHz, which is a little higher than the standard 166MHz. If you want to test the stability of the memory when it works, you need to take the Burn in test item in SISoft Sandra as the standard of memory stability, run the CPU benchmark calculation 10 times or more, and confirm all the stability.

Detection display screen

For the monitor, if you buy a brand product, there won't be much problem. If you are not at ease, you can display the information of the monitor under the "Monitor" of AIDA32 software. If you buy enough LCD monitors, LCD monitors sometimes have bright spots, dark spots or even bad spots due to the influence of production technology. So how can we know whether the LCD screen has any bad points? You can use DisplayX software to make a judgment. After running the software, you can choose a regular single test-solid color, and you can switch colors such as white, red, green, blue and black from time to time in the full screen state. As long as you find a point on the screen fixed to a color, it is a bad point. However, due to the manufacturer's regulations, products with less than three defective points are generally normal products, so this does not mean that there is a problem with the product quality. However, if some merchants guarantee that there are no bad points, using this test can let the merchants change you to a product that really has no bad points.

Fourth, write it at the end.

In fact, in addition to the above methods, you can also get more hardware information in the motherboard BIOS and boot screen. Of course, when buying in reality, we need to learn from experience. For example, choose some large-scale businesses to buy, and don't just go to some unknown stalls and "grocery stores". Secondly, when purchasing, the other party must issue a formal invoice for the product warranty and write the product warranty clearly so that we can complain in the future. In fact, there are many ways to prevent buying fakes. The above authors only provide some reference ideas, not all methods and techniques.

The easiest way is to call the security number on the box.

For CPU, it is best not to buy in bulk. Check the boxed CPU in official website first, and they will teach you how to prevent fake CPU and look at pictures.

The motherboard should pay attention to whether the screws on the board are crossed.

Hard disk is not something that ordinary companies can do because of its high technical requirements. So there are no fakes.

Look at the memory and see if the golden finger has been scratched. Look at the memory particles. If they are too smooth, they are fake. (Better call)

There is no such thing as a fake graphics card. Just look at whether the golden finger is scratched. If it is, it means it is second-hand. Please look carefully.

I won't say much about other small fragments. Just call 800 directly.

It is suggested to find a big store to match, because that proves that the stronger his economic strength, the smaller the store will move soon. It will take a long time.

In addition, I want to remind you that the hardware he gave you should match your own scheme. Don't mistake a letter. Then pay attention to whether the hard disk is IDE interface or SATA interface.

It is not a concept with fake cigarettes, but a fake, for example, one letter in a string of letters is different and so on. Or the configuration list given to you is the same, and it is another brand when it is sent to you. Of course, the price difference. Because the accessories are in the chassis, many people will not pay attention, so they are fooled. This is the legendary JS practice. Be sure to check in detail according to the brand and model data listed in the configuration list. Why don't you find a friend who knows what to do? Cheap or expensive things are another matter. Don't be fooled by JS. Buy defective products.

Hardware has 800 anti-counterfeiting mobile phones!

Hard disk, floppy drive, CD-ROM drive, motherboard, graphics card, sound card and other spare parts must have complete packaging bags (that is, a layer of anti-static plastic sleeve, which is very strong), and now they all require factory certificates. The most important production date is CCC certification. Don't do it without this; In addition, most of them have laser anti-counterfeiting and free telephone confirmation.

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