How to choose a computer to buy a computer, what are the precautions?

Do you know what precautions are available for purchasing a computer? With the development of electronic technology and the price drop of products, more and more people are choosing to buy notebooks. Nowadays, there are many notebook brands on the market, and the models are dazzling. New words and new technologies are emerging one after another. How to choose a suitable notebook? This question is for most of the currency buyers who are outside the computer city. The most concerned issue. Today, I will choose a suitable notebook from all aspects, and I hope to help those who hold the currency.

How to choose a computer to buy a computer, what are the precautions?

Brand

Mainstream brands: Lenovo (including IBM PC), Dell, HP, Asus, Acer Features: price, configuration, quality, workmanship, these factors are more balanced

Second-line brands: Founder, Tsinghua Unisplendour, Shenzhou

Features: the same configuration, the price is very low, but the quality and workmanship deviation

High-end brands: Apple, Sony

Features: Industrial design is very good, workmanship is very fine, quality is also good, but configuration deviation

Configuration

The configuration that affects speed is: CPU, memory, and graphics card affect the visual experience: screen, design

Easy to ignore but very important factors: heat dissipation, invoice

1: CPU

A lot of computing work on the computer is done by the CPU. The graphics calculation is done by the graphics card or the GPU (Graphic Processing Unit) integrated on the motherboard.

The CPU is an important criterion for measuring the level of a computer configuration.

The CPU mainly has two brands, Intel and AMD. In notebook computers, Intel's CPU is mainly used, and some low-end notebooks use AMD's CPU.

The CPU used at the high end (price > 6000) is as follows:

Intel Core 2 i Series (i7)

Intel Core 2 P series (P8800, P8700, P8400, etc.)

The CPU used at the mid-end (4000 <price <6000) is as follows:

Intel Core 2 i series (i5, i3)

Intel Core 2 Duo T Series (T6600, T6570, T6500, etc.)

Intel Core 2 i series is Intel's latest CPU, using more new technologies, such as: CPU integrated GPU, to some extent, improve the computer's image computing capabilities. Or the CPU part of the i3 series adopts a dual-core design and supports four threads through Hyper-Threading Technology.

Low-end (price <4000):

2. Memory

Memory mainly depends on the capacity, and now the market is mainly 2G, 2G is enough to meet our application. In addition to looking at the capacity, you can also refer to this indicator: DDR. DDR is an indicator for evaluating memory bandwidth. The higher the DDR parameter, the larger the amount of data transferred in memory per unit time.

The specific models are: DDR3 1333, DDR3 1066, DDR2 800, DDR2 667. Now mainstream notebooks use DDR3 1066 memory.

3. Graphics card

The image-related operations in the computer are all done by the GPU (Graphic Processing Unit), and the GPU is integrated on the motherboard. This is what we usually say. The GPU is on the graphics card, which is what we usually say.

When the integrated graphics card is running, the operating system needs to dynamically allocate memory to the graphics card to store data. Compared with the discrete graphics card, it imposes an extra burden on the system and consumes part of the memory. The discrete graphics card is equipped with faster graphics memory, so other computers with the same configuration have better performance than integrated graphics.

But today's integrated graphics PCs are enough for our everyday applications, unless you often play 3D games and watch HD movies (1080P, H.264). Today's discrete graphics cards generally have the ability to decode HD in hardware. Some integrated graphics cards do not have this capability. These require software decoding by the CPU. At this time, the computer is more difficult to run.

Many notebooks under $3500 use integrated graphics. The two most common integrated graphics are: Intel GMA 4500MHD and ATI Mobility Radeon HD3200. The latter's performance is better than the former.

Notebooks with more than 3,500 yuan basically use discrete graphics cards.

4: screen

The screen is mainly divided into a wide screen and a normal screen, the wide screen is a screen with an aspect ratio of 16:10, and the ordinary screen is a screen with an aspect ratio of 16:9. Widescreen displays are better than regular screens when watching movies on the full screen. The screen sizes are mainly 14 inches and 15 inches.

5: Appearance

To be honest, although different computing systems have different computing speeds, the actual speed is also affected by many factors, such as the degree of optimization of the operating system. In addition to speed, appearance is also an important factor affecting our experience.

6: cooling

Cooling is a very easy to ignore but very important factor, because the notebook integration is high, the degree of heat dissipation directly affects the stability of the computer, because if the CPU is not scattered well, resulting in too high temperature, it is easy to cause the computer to crash, and Will shorten the life of the CPU.

A very effective way to evaluate the heat dissipation of a laptop is to let the laptop run more programs at the same time, increase the CPU usage, and hear the buzz of the CPU fan for a while. If you are particularly large, this notebook is not very good.

invoice

Although laptops are not prone to problems, warranty services are still necessary. But many notebook manufacturers need to provide invoices to provide warranty service.