1.cpu capacity, now the mainstream cpu has low power consumption and strong computing power (that is, high frequency). 2. The ability of graphics card, discrete graphics card is of course good, but you have to look at its architecture. Now the mainstream nv9 series architecture is better than nv8 series, so the price of some nv8 advanced graphics cards will be lower, depending on your hobby. If you are not afraid of calorific value, you can buy a computer with a graphics card above nv8600. 3. It's heat and endurance. The importance of this point is easily overlooked. High-calorie notebooks should pay attention to heat dissipation in summer, otherwise it will be very uncomfortable to restart frequently.

Preparation is essential. Careful preparation before buying can often achieve twice the result with half the effort. In the early preparation, we must first decide the right brand according to our own budget, and never choose a small brand or a miscellaneous brand with poor quality and after-sales because of greed. Secondly, it is necessary to understand the configuration of this machine, as well as the pre-installed system and basic after-sales service. Finally, it is necessary to know the recent market conditions, price trends and even promotional activities of the optimistic models, which can be found through professional websites and print media. Moreover, due to the fast response speed of online media, it is generally possible to gain insight into market changes at the first time. As long as you pay attention to the relevant websites before buying, you can basically understand the market situation. If you don't think these can be guaranteed, you can call the after-sales phone number of your favorite brand or visit the website of the relevant brand to find out. In this way, you can not only get the latest and most accurate price information, but also avoid the merchants from deducting your gifts. It is very important to check before unpacking. After selecting the model and negotiating the price with the merchant, it is necessary to enter a complicated but careful inspection process. Machine inspection mainly includes three processes: unpacking inspection, appearance inspection and configuration inspection. Don't underestimate the inspection of the product packaging box before unpacking. This is often where profiteers set traps. Don't rush to open the box after the merchant brings the machine. First of all, observe the appearance of the box. We should be careful if we find the box is yellow and black. This kind of box is likely to be overstocked by merchants for a long time. After consumers want to buy related products, they will put the displayed prototype in and re-seal it. The case is brand-new, but the exterior is slightly damaged, which is often a problem during transportation and sometimes unavoidable. In addition, packing boxes can often provide us with some useful information. Many manufacturers will paste the machine identification certificate-product serial number on the box. Some big brands will also provide inquiries about product serial numbers. And the serial number of the product must be consistent with the number on the warranty card and notebook in the chassis. The common fault of ThinkPad notebook number brushing machine can not be identified by simple serial number query and comparison. We can only identify it with the aid of COA on the back of the fuselage. COA is the Windows serial number label on the back of the machine, which is Microsoft's Certificate Of authentic ation. Generally, the licensed COA is red, with the words SimpChn, and the parallel goods are blue. A good way to check the appearance identification prototype is the common name of the notebook displayed in the store, which is sometimes damaged in the fuselage shell because of improper protection measures of the salesperson. In fact, the hardware quality of most prototypes is no problem, so if the merchants are willing to sell it cheaper, it is very tempting for friends with tight funds. In particular, some machines with no or little shell damage are still valuable if they can be cheaper than 500 yuan. What is hateful is that most merchants will not do this, but will put the prototype in the box, reseal it and sell it as a new product. Consumers will get away with it if they are not careful. Sometimes buying a prototype will not only be difficult to "face", but also reduce or lose related services because the prototype has been out of the factory for too long. Because some brands have adopted the provision that the international warranty automatically takes effect after leaving the factory, for example, HP machines usually automatically activate the warranty service 59 days after leaving the factory. If you are unfortunate enough to buy the prototypes of these brands, you will probably lose your due after-sales service because it takes too long to leave the factory. Checking the prototype is a test for the eyes, because the prototype is often displayed for a period of time, so you will find clues when you look closely. Let's check the top cover of the machine carefully first, and look for scratches through the combination of different angles and light. In addition, you can also check the I/O port, power plug and battery interface of the machine. The brand-new machine will definitely not have dust, dirt and used traces. The hardware identification software helps to pass the appearance inspection of the above-mentioned packaging box and machine, and then enters the substantive hardware configuration detection link. In fact, you can simply check the system properties of Windows to understand the related hardware situation, but in order to be more rigorous and accurate, I still recommend you to use some excellent detection programs. First of all, check whether the hardware conforms to JS. However, because many recognition software can only be detected after the machine itself is equipped with a driver, its accuracy and convenience are undoubtedly greatly reduced. The Hwinfo32 recommended by the author is a special one. Not only can it be recognized without driving, but it can also be used directly without installation. As long as you run this software, all the hardware information will be clear to you. Then check the LCD screen. I believe no one wants to buy a notebook with a bad LCD. Although it is normal for manufacturers and merchants to boast that the number of bad points is less than three, this cannot be the reason for us to pay for it. After all, the probability of bad is still very low. Why should I accept it among tens of thousands of people? So don't care about the rhetoric of JS, and you must pay more attention when checking the machine. What we usually call a bad spot is actually a "bright spot", which is a kind of bad spot. Obviously, it is easy to find. At present, a few LCDs in the brand promise have no bad spots, which means there are no bright spots. The best way to detect bright spots is to use professional software, such as Nokia Ntest. Is a professional monitor testing software, which can find bright spots, color cast, poor focus and other problems. Do not need to install, can be copied to the hard disk for direct use, support multiple systems. We need control software to display different image combinations to find LCD problems. It's time to test your eyes. You must keep your eyes open and observe carefully. As long as the problem is found, ask JS to replace it immediately. If he puts forward that theory and perfunctory, we can slap it and leave. There is no shortage of places to buy this kind of machine now. So when you are ready to purchase the machine, you must prepare the test software, USB flash drive and related materials, and remember to carry them with you. Guarantee of after-sales service of warranty card invoice If the above inspection can pass, then this machine can pay the bill. But don't think that everything is fine now. Asking for invoices and filling out warranty cards are also important links that cannot be ignored. Invoice is the only legal certificate for merchants to fulfill the national three guarantees regulations. If you believe the merchant's sweet words and don't issue an invoice of one or two hundred yuan, you won't be able to return the machine within 7 days, 15 days if there is any problem during the three-guarantee period. In addition, most manufacturers stipulate in their own after-sales service terms that the warranty card and invoice must be presented at the same time when maintaining, otherwise the legality of the machine cannot be confirmed. When filling in the invoice, you should also pay attention to the model and product code of the machine, which is generally stipulated in the manufacturer's warranty terms. The warranty card must also be stamped with the official seal of the merchant, and the attachment should be sent to the manufacturer by the merchant. Such a complete set of machine selection guidelines will be OK. As long as you follow this method, you will definitely choose a notebook computer that you are satisfied with.

Edit this section of maintenance

1. Precautions for the maintenance of the shell: Do not scratch the shell. The case of notebook computers is usually quite smooth, and some of them are easier to maintain. Usually only one piece of cotton cloth can make the shell spotless. It should be noted that the notebook computer must be packed in a separate leather bag or cloth bag during handling, so as to avoid scratching the shell on the way. When working, don't put the laptop on the rough desktop to protect the brightness of the shell. Second, LCD maintenance precautions: the appearance of notebook computers is mostly like notebooks, with a folding design. The interior is divided into display screen, keyboard and mouse operation equipment on the other side, and various peripherals (such as CD-ROM and floppy drive) and interfaces (USB, ide and infrared data association) on the side. The overall appearance design is developing in a lighter and more fashionable direction. In notebook computers, liquid crystal displays are the most vulnerable. Some ultra-thin portable liquid crystal displays will be easily damaged if they are squeezed. Attention should be paid to this aspect, and some notebook computers with aluminum-magnesium alloy shells can withstand greater pressure. In general, it is not recommended to put it on a laptop. In addition to preventing squeezing, of course, daily cleaning is also required. It is best to gently wipe the LCD screen with a soft cloth that clean water (or pure water) will not fall off. In addition, using full black screen protection in software is also beneficial to the life of LCD. Third, the keyboard note: the keyboard that needs waterproof is the most used input device. Control your attention when you press the key, and don't use too much force. When cleaning the keyboard, you should first use a vacuum cleaner and a suction nozzle, use the smallest and softest brush to suck up the dust between the gaps of each key, then wipe the key cap with a soft cloth and dry it with a dry cloth immediately after wiping. Remember, don't let those soups and water get too close to your laptop. According to the manufacturer's test conclusion, water droplets splashed on the keyboard are the most dangerous killer of notebook computers, and the losses it causes will be irreparable. Fortunately, some laptops now have waterproof keyboards, which makes some careless users feel a little relieved. Fourth, the optical drive Note: Take out the optical disc Now many notebook computers are equipped with DVD optical drives, of course, this is the same as CD optical drives. It is necessary to clean the bald head regularly. Also pay attention to take out the CD in the CD-ROM drive before taking out the notebook computer, otherwise it will collide with the magnetic head or laser head when it falls to the ground or collides, damaging the data in the disk or CD-ROM drive. V. Hard disk Note: Shockproof and backup Although the notebook computer boasts that its hard disk has a very good shockproof coefficient. But note: vibration is still very dangerous to the hardware of notebook computer. Don't bet on important data, try to work in a stable place. Of course, you also need to organize and back up data like a desktop. Note: All stable notebooks can work with local alternating current. At this time, we should pay attention to whether the voltage is stable. If possible, you can cooperate with a voltage regulator. If the notebook is damaged due to large current fluctuation, it is quite worthless.

Edit this white notebook.

A self-made or modified notebook computer is called a white-label notebook. White-brand notebooks account for about 5% of the notebook market, and this number is still growing slowly. The notebook computer industry has done an excellent job in preventing close contact between end users and laptops. They make it difficult to open and modify the notebook computer, and it is not easy to buy related parts. In addition, in most cases, opening the laptop case will void the warranty. It is difficult to find all the parts needed to assemble laptops, but manufacturers like ASUS and ECS allow some users to order empty notebooks. In addition, they also allow dealers to assemble white-label notebooks and sell them to customers, and people can transform and upgrade existing components. Companies like TechStyle have already started this business.