How to choose a laptop : Laptops let you get rid of the shackles and bring work and entertainment to any place you want to go, whether it is college students or business people who fly frequently An important part of daily life. Even the cheapest notebook computer today, its performance is much better than the previous products, the notebook computer has matured, and in the future it may become an indispensable thing in your life. If you are going to buy a laptop, in addition to performance, you have to consider other aspects. Such as product size, weight, screen size, battery life, and keyboard quality, not to mention some optional things such as built-in wireless modules. The laptop is a machine with a complicated structure. Now we start with each part. Introduce readers to their functions and market status, and give recommendations for purchase Processor: The emergence of the Intel PenTIum-M processor is a revolution in laptops. In our tests, laptops with Pentium-M processors ran much faster than mobile PenTIum 4 processors. The PenTIum-M processor also extends battery life. At present, mobile PenTIum 4 processor products are very scarce. Most notebook computer suppliers are using Pentium-M processors in various grades of products. The latter has become mainstream, and products using mobile Pentium 4 are gradually being eliminated. . System memory: Unless you buy a bargain, generally speaking, new laptops are now equipped with 256MB ~ 512MB of memory, in addition to word processing and e-mail, if you want to do more work, it is recommended to configure more than 256MB In the environment of less than 256MB of memory, the operating speed of Window XP will be limited. Now the new application software has a great demand for memory. Using less than 256MB of memory will slow down your work. If the funds allow, when you buy a laptop, it is a good choice to upgrade the memory to 512MB. Increasing the memory will also help you extend the life of the laptop. Usually laptops will provide 1 to 2 memory expansion slots. Expansion of memory is very convenient. Be sure to add enough memory when purchasing. Display screen and display card: The screen of the laptop continues to grow. Some manufacturers of laptops have even produced 16-inch (1 inch = 2.54cm) and 17-inch screen laptops, but do n’t confuse our choices. Now 14.1-inch and 15-inch laptops are still the mainstream choice. If you want to enjoy high-quality picture quality and sufficient funds, choose a 16-inch or 17-inch large screen product. And if you often carry it around, it is more reasonable to choose a lightweight laptop, such as a 12.1 inch or 13.3 inch ultra-thin laptop. The choice of display card is completely different from person to person. Generally speaking, the grade of the display card only affects the display speed, not the display quality. If you are not interested in 3D games, then the integrated display card is enough for you. Optical drive: Some manufacturers have begun to provide readable and writable DVD burning optical drives for notebook computers. This is a good thing. Another good thing is that Combo optical drives (DVD-ROM and CD-R / RW combined) have become mainstream. Some laptops are equipped with this kind of optical drive, and only those relatively cheap laptops still use CDROM drives. In terms of choice, the current Combo products have strong practicality and cost performance. If you need a DVD burning optical drive, you can directly tell the dealer. Now the same model generally has sub models with different optical drives, and some products can even Hot-swap to replace the optical drive. The optical drive device of some products can be easily replaced, and such a product will bring you convenience for future upgrades. Battery: The Intel Pentium-M processor extends the battery life of the laptop by a large amount. In our tests, the average battery operating time of the product with this processor is 3.5 hours, and some optimized design laptops can run for a long time. Up to 8 hours. Now most of the batteries equipped with laptop computers are lithium batteries, which have a larger capacity than traditional nickel-metal hydride batteries. Nevertheless, it is still necessary to confirm when you buy. Many suppliers also provide spare batteries to extend the use time, but such accessories are often expensive. Lithium batteries are used by most notebook computers. If you work outdoors, please make sure that your battery capacity is above 4000mAh / 10.8V. Hard disk: You may not need that much space, but the hard disk capacity of laptops has been constantly increasing, and the amount of information on your hard disk capacity will become higher and higher in the future. The relatively cheap 20GB hard disk products are now difficult to find. There is a rule for the price of hard disks. In the mainstream capacity range, small-capacity products will not be much cheaper than large-capacity products, so choosing large-capacity products in mainstream capacity is often the most valuable. For now, the capacity of 40GB ~ ​​60GB is very cost-effective, even if you don't need it now, you will see its benefits in the future. Keyboard and laptop mouse: Although you can gradually get used to the keyboard of almost any laptop, it is best to try it before buying. The keyboards of thin and light notebook computers are usually smaller than ordinary keyboards, and the keystroke is relatively short. The layout of the keys may also be different from the standard keyboard. The operation feel is very different from that of a desktop computer. There are two types of mouse devices on notebook computers: touchpad mice and pointing mouse. The former is generally used in most notebook computers, while the latter is only used by a few manufacturers such as IBM, Toshiba, and Sony. People quickly adapt, but the operability is far better than ordinary mouse. The operation flexibility of the touchpad mouse of the notebook computer is far worse than that of the ordinary mouse. If you often use the mouse, please buy a USB port external mouse. Communication interface: Now few laptops will have a complete set of interfaces. Serial ports are rare, PS / 2 ports (for mouse or keyboard) and infrared ports are gradually disappearing, but most laptops have a parallel port and a PC card slot, and most laptops also have There are at least 2 USB 2.0 ports. Many machines now provide 4 USB 2.0 ports. The number of machines with FireWire (IEEE 1394) ports is increasing and has become mainstream. This port can be used to connect high-speed drives and MP3 players. And DV camera products. In all laptop products, the built-in 100Mbps network card has become the standard. Some high-end products have a built-in 1000Mbps high-speed network card. The Centrino laptop computer has a built-in wireless network card that supports 802.11b / g network protocol. Products equipped with Intel Pentium-M or AMD processors Optional 802.11b / g wireless network card or Bluetooth module is also becoming more and more popular. At present, 802.11b / g wireless LAN is developing rapidly. It is very practical to buy a laptop with this function (such as Centrino), but the Bluetooth module is not yet Popular, if there is no special need, it is not necessary to buy it. Now the communication interface of the notebook computer is very rich, from left to right are the card reader (upper), USB port, 1394 port, S-Video output port, USB port. Weight and design: The average weight of a laptop computer ranges from a 4kg desktop replacement model to a 2.5kg internal optical drive model, to a 1.5kg external optical drive ultra-thin model. Ultra-thin laptops with large screens, which were once rare, are becoming increasingly popular because their charm lies in a balance between performance and weight. Now that the floppy disk is gone, the laptop with a separate floppy drive is almost extinct, but the optical drive slot of some laptops is designed as a modular device, then you can replace it with a floppy drive, a second hard drive, a Zip drive, or a battery. When you buy, not only consider the weight of the laptop, but also the total weight of the AC adapter, plug-in components and connecting cables. It's not that the higher the grade, the better. Before you buy a laptop, think about what you use it for. If your main purpose is to do some word processing, make data tables, and send e-mails online, then a low-end laptop with a low-frequency Pentium-M processor, 20GB hard drive, integrated graphics, and 256MB of memory is enough, and Products with top-level processors, high-speed graphics cards, and large-capacity hard drives will cost you thousands of yuan without much use. Most dealers will let you choose the product you want from a series of products with different configurations, so the control is on you. Our general situation is to first determine the funds and then choose the machine. In this case, you must There are trade-offs in the configuration of the laptop, which one you need and which one you do n’t need, you may have to accept a hard drive with a smaller capacity or a DVD to buy a relatively faster laptop. ROM drive and discard a Combo drive. Unlike a desktop computer, the upgrade ability of a laptop computer is limited. You can only upgrade a few components in the machine, such as memory and hard disk. Others like graphics cards are permanently soldered to the motherboard and are not replaceable. Therefore, you have to carefully select the products you need. The purchase of a laptop is a job that requires comprehensive consideration. You may never find a product that suits your needs for each part. This work needs to be compared. According to your individual needs, the satisfaction score of each part is carried out. Add (including price), and finally choose the one with the highest score. We summarize the configuration and price of notebook computer products at this stage in Table 1 for readers' reference. Are you ready to buy a laptop? If you are a master, you can ignore it, but if you do n’t know anything about it, PCWorld China will give you a reference configuration. The price of a laptop in this configuration is between 9,000 yuan and 15,000 yuan, which can meet most users. Need. A 1.5GHz Pentium-M processor: It can meet daily tasks such as word processing, spreadsheet production, sending e-mail, etc. The latest and most expensive processor is not suitable for everyone, Pentium-M processor can provide us Stable performance and long battery life. 512MB memory space: In the face of current software systems, a memory less than this capacity may slow down the machine. The performance of memory larger than this capacity is not obvious under normal use conditions. A Combo drive: CD burning and DVD playback are equally important. Now that DVD recorders are expensive, Combo is the best choice for ordinary users. A 40GB hard drive: Unless you need to store multimedia files or database files, 40GB is enough, don't forget that you still have a recorder, it is safer to use it to store important files. 14.1 inch screen: Screens larger than 12.1 inches will look more comfortable to the eyes. 14.1 inches is the best compromise between practicality and portability, neither too small nor too heavy. Built-in optical drive design: The product of the external optical drive can be made very light, but it is quite troublesome to use. When you take the optical drive out, you will find that the total weight is not lighter than the built-in model. For 90% of users A product with a built-in optical drive is more reasonable.
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