1. Eye view: identification from the hardware itself

1. From the identification of packaging anti-counterfeiting labels

When purchasing hardware products, the first thing to do is to look at the product packaging. Taking Kingston memory as an example, starting from January 10, 2005, all Kingston products distributed in China will be Using a new "nano-refractive" anti-counterfeiting label, it is said that this laser-like anti-counterfeiting label has no possibility of counterfeiting. This anti-counterfeiting sticker will replace the two-year-old fake phone and text message stickers. From now on, genuine Kingston memory will be available It can be seen in eye-catching locations, and there is no need to verify the authenticity through third-party means such as phone calls, text messages, etc.

For other products such as motherboards, graphics cards, optical drives, etc., because they all use outer packaging, there are usually 800 and other toll-free consultation hotlines on the packaging boxes. You can use this phone to inquire whether the manufacturer's products are genuine. For example, SONY's opto-magnetic storage products (CDRW, DVDRW, etc.) sold in China are all affixed with blue anti-counterfeiting labels issued by the China Association for Quality Inspection.

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The label is composed of two layers of stickers. When you peel off the surface of the label, you can see the anti-counterfeiting code on the second layer of stickers, but on parallel imports and fakes There is no anti-counterfeiting code on the label. You should peel off the surface immediately after purchase and call the toll-free number 8008106046 on the anti-counterfeiting label to check the authenticity of the purchased product. In addition, SONY's licensed products are all affixed with the anti-counterfeiting label of "Sony Original Lifu Agent". This is an important method to identify licensed, parallel and fake goods (special reminder: fake and parallel goods are also labeled with anti-counterfeiting trademarks).

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2. Check the authenticity from the chip itself

Since many JS companies now make product packaging too real, and many users buy bulk products (such as bulk CPU, memory and hard disk, etc.), users cannot pass The outer packaging is used for identification, so identification must be based on the quality craftsmanship of the hardware itself. For hardware such as CPU and memory, since the core chips are exposed to the outside, these are often products that are most easily polished or faked by JS. It is easy for us to use eye recognition. Take CPU as an example. When many users purchased the INTEL P4 3.0G box package product, after paying the money and taking the goods, they actually took a piece of CPU home.

Let’s take a look at this P4 3.0G box package CPU. In the label of the product box, the secondary cache is indicated as 512K. This is completely correct, but when you open the package and look at the surface of the CPU , the second level cache marked above is 1M. Everyone on earth knows that the L2 cache of P4 3.0GC (FSB800) is only 512K. From this, we can conclude that this is a counterfeit box CPU.

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Let’s take AMD XP2500 as an example. In fact, the fake XP 2500 is Thorton Polished from the core 2000, its core is the same as the Baton 2500, except that the second-level cache is turned off half, to 256KB. The original counterfeiting method is to connect the L2 gold bridge on the surface of the CPU with a pencil or silver paint and then open another 256KB cache. In this way, a Thorton core XP2000 with a price of only more than 400 yuan is transformed into an XP Barton2500 worth more than 700 yuan. JS seeks nearly 200 yuan for this. Yuan of huge profits. In addition, the fake XP 2500 has tampered with the L2 golden bridge, so under normal circumstances, JS uses fragile stickers to cover this key place tightly.

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Let’s take Hynix’s modern memory as an example. Almost nine out of ten Hynix’s modern memories are polished and fake. We compare a genuine piece of memory with a polished piece of hynix memory. From the surface, there doesn't seem to be much difference.

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But as long as you look carefully, there is a unique circular dimple on the corner of the memory particle. For particles that have not been polished, the pits are shiny and the surface of the particles has a frosted feel, as shown in the picture below.

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The polished memory is coated with a layer of black paint, so the pits are almost filled, and you can scrape them with your fingers , the laser etching on it will fall off. The polishing method of these memories is relatively simple. After covering the coating, it will be laser etched twice by itself. Its execution can be easily seen with a household eye.

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3. Look at the quality from the PCB layout

For products such as graphics cards and motherboards, because the core is covered by the heat sink, it is impossible to disassemble the heat sink when purchasing. In addition to identifying it through the above methods, we also check the PCB layout of the product itself. Whether it is reasonable or not is also an important means to identify quality. For example, for a graphics card with the same specifications, model, and chip, the genuine product uses a public PCB design, while some fakes use a non-public board design due to cost control. "Non-public boards" are more often just products born for "low cost" or publicity needs. For example, because many people’s understanding of PCB only remains at the level of “a certain graphics card uses N-layer PCB” and “the more layers of PCB, the better”, JS has an opportunity to take advantage of it... ...A graphics card obviously only uses a 4-layer PCB, but JS insists on saying that this graphics card uses a 6-layer PCB.

To identify the quality of PCB, we have to start with the details. For example, by observing the oxidation around the blind holes and solder, we can know the quality of the PCB materials; by observing the light transmittance at the edge of the PCB, we can know the approximate thickness of the PCB. Of course, if the merchant can provide multiple different physical graphics cards, then the identification work will be easier to carry out! For example, the low-pass filter circuit cannot be ignored. The low-pass filter circuit (generally, the low-pass filter circuit is close to the VGA output interface of the graphics card. It is a circuit composed of many capacitors and inductors. It is used to improve the stability of the display signal and ultimately obtain high-quality output. Picture), not many consumers pay attention to it, but many graphics card manufacturers squeeze profits from it.

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In addition, some fake motherboard products only use 2-phase power supply design, while genuine high-end products use 3-phase or even 4-phase power supply design. .

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Or some inferior products use inferior capacitors and other components, which not only The motherboard cannot be overclocked and crashes frequently even under normal operation. There are also some fake products. Although the specifications are the same, some functions are omitted. For example, they originally support 3 memory slots, but only 2. It uses a low BIOS version and a low-end integrated sound card, and even omits some additional functions such as network card and 1394 (if the genuine product has them).

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2. Hand weighing method: the feeling in the hand is also very important

For products such as graphics cards, motherboards, and power supplies, you can also feel them with your own hands. In other words, you can know what is going on by just weighing the product. For example, motherboards or graphics cards, genuine products are designed with large boards and have very high specifications. However, for friends who cannot identify the components themselves, it is impossible to identify fakes from their appearance, because fakes are also designed with large boards, but as long as you compare them, you will be able to identify the fake ones. The original motherboard is very light when you hold it in your hands, while the genuine one is very heavy.

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This is because the genuine products use good PCB and high-quality components, while the fake ones use thinner PCBs and the components on the motherboard are also Inferior quality, even saving some non-critical components, so of course much lighter. Generally speaking, the PCB of a good board has smooth edges and corners (not hurting the hand) and feels comfortable to the touch. The board feels heavy and textured in the hand.

Another example is the power supply. At present, the thickness of the steel plate of the power supply casing is generally 0.6MM or 0.8MM. The power supply should feel heavy when held in the hand. Especially some power supplies that have passed safety regulations or certifications will have some additional circuit boards, components, etc. added to increase their safety and stability. Of course, the weight will increase. And according to the current manufacturing method, the higher the power, the thicker and denser the coils and other components inside, so the weight should also be heavier. Although we cannot arbitrarily say that the heavier the power supply is, the better, but it is definitely not good if it is too light.

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3. Tool method: Use software to test real quality

Although the above methods can be largely avoided You can buy fake products, but these are all theoretical "paper talks". If you want to know whether the product you bought is genuine, or whether its performance is as good as the merchant said, it will be clear at a glance using some professional tools and software for testing. (The following hardware products in the software test are for your reference only).

1. Test CPU performance

In the entire PC system accessories, the CPU undoubtedly plays the most core role. Many friends do not know enough about the CPU and mistakenly believe that the frequency of the CPU is higher than the main frequency. The higher the better, the more expensive the higher the performance. Especially for some polished and fake CPUs, there is no deep insight. Often when an expensive "core" is bought for home use, it either crashes when playing games or renders when drawing. The speed of the animation is not as good as expected. Let’s unveil the true story of the CPU so that you will no longer be blind when purchasing a CPU.

If it is an INTEL processor, you can use the Processor Frequency ID Utility, a tool developed by INTEL. It uses a frequency determination algorithm to check the internal data in the processor, and compares this data with the detected The operation frequency is compared, and the overall status of the system is finally notified to the user as the comparison result. Run the Processor Frequency ID Utility and its main interface will appear. From here, you can see that the CPU is INTEL Celeron 4 1.7G and the system bus frequency is 400Mhz; the "CPUID data" displays the detailed parameters of the CPU, such as processor characteristics, high speed Cache information, etc.

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If it is an AMD CPU, you can use the AMD CPUID software to detect it. It can measure the speed of the CPU produced by AMD and the speed of the CPU. Some IDs and data. Of course, you can also use the WCPUID universal test software, which supports both INTEL and AMD processors. In addition to detecting the CPU's general ID information, internal/external frequency, multiplier and other basic information, it can also detect whether the CPU supports MMX. , KNI and 3Dnow! instruction.

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Sisoft Sandra can perform system theoretical testing on the CPU, including professional testing of CPU Arithmetic and CPU Multi-Media, which allows us to understand CPU floating point unit performance, etc. Run the Sisoft Sandra software, find the CPU Arithmetic Benchmark and CPU Multi-Media Benchmark projects on the main interface of the program, and run the tests respectively.

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Super π is a small software used by Japanese overclocking experts to measure their performance. It uses the floating point computing power of the CPU to calculate π ( Pi), overclocking players generally use it to test the stability of the system and test the time it takes for the CPU to calculate a specific number of digits of pi. After opening the software, click "Start Calculation", and then select the 10,000-digit π value you want to test in the drop-down menu to calculate the time required for the CPU test. The shorter the time, the higher the CPU performance. We can find the results of corresponding CPU models in some evaluation articles. For some shoddy CPUs, either the results are obviously different, or they will "crash" after running for a long time.

2． Test memory performance

For ordinary users, they have no ability to identify fake and inferior products of memory, and these memories often easily cause the machine to interrupt during the game, the screen freezes and slows down, etc. Therefore, how to test your memory performance? Mastering the memory performance will help us understand the memory requirements of the game, thereby making you invincible in the game competition.

Taking Samsung DDDR333 memory as an example, run SiSoft Sandra, select the "Mainboard Information" option on the main interface and run, you can get memory-related information (Figure 22), from here we know that this is a 256MB PC2700 (DDR333) memory. When the memory works at 133MHz FSB, 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 higher than the standard 166MHz. If we want to test the stability of the memory during operation, we need to use the Burn in test item in SISoft Sandra to run more than 10 CPU Benchmark calculations as a standard for memory stability. All passes are considered stable.

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3. Check the monitor

As for the monitor, if you buy a brand product, there will basically not be much problem. If you are worried, you can display the monitor information under "Monitor" in the "Monitor" of the AIDA32 software. . If you are buying an LCD monitor, affected by the production process, the LCD monitor will sometimes have bright spots, dark spots or even dead pixels to a large extent. So how can we know whether the LCD display has dead pixels? You can use DisplayX software to make a judgment. After running the software, select the regular single test - solid color, and you can switch between white, red, green, blue, black and other colors in the full screen state. As long as you find that the screen is fixed If the color remains unchanged, it is a bad pixel. However, since manufacturers stipulate that products with less than 3 dead pixels are generally considered normal products, this does not mean that there is a problem with product quality. However, if some merchants guarantee that there are no dead pixels, using this test can allow the merchant to replace you with a product that truly has no dead pixels.

The above are all copied~

You can go to Tu Laomao Link in Zhongguancun to see them, there are many in them!