Many treasure who want to buy a notebook computer want to start with a second-hand one because of limited budget, but they have no idea? I don't know what conditions to focus on. Don't worry, let me, an experienced person, share your worries ~ After all, all my friends who want to buy computers will come to consult me ~ ~

Let's talk about how to choose second-hand notebooks first, and then talk about the places that should be paid attention to, so as to master the skills:

First, the time to market of the model.

Computers, like mobile phones, are updated too quickly. When following Moore's law, they must be upgraded, so the models should not be too old. The CPU starts from the 5th generation Intel Core, that is, the model number is i5-5xxx (except Macbook series notebooks and mobile workstations). Hundreds of old models, not only have low performance, but also have long actual use time, which makes you doubt and make you unable to live.

Second, the price.

The price above 3000 yuan should be carefully chosen. At present, some low-end Intel Core 5th, 6th and 7th generation second-hand notebooks are generally on the high side, and the market price is around 3,000 yuan, with extremely low cost performance. Regardless of performance and warranty, it is better to buy a brand-new notebook at a price of several hundred yuan. So you must make a budget before buying a computer.

Third, battery life.

In terms of battery life, the battery will take at least 2 hours. Be sure to ask the merchant, CPU standby temperature, baking machine temperature and actual use time when purchasing. Because of the lack of battery life, it may not only be solved by changing a battery, but also because of other hardware problems such as motherboard leakage.

Fourth, big brands.

Focus on buying second-hand notebooks, we must pay attention to brands and choose big brands, not brands that few people have even heard of. Big brands include Lenovo, Dell, Hewlett-Packard, Asus, Acer and so on. Because a good brand has a good production line, the original design, production technology and finished product inspection of the products are first-class. So their quality is also the most guaranteed.

The following are all important places to pay attention to, see?

First, CPU

Computer configuration includes many aspects, such as CPU, screen, graphics card and so on. The first is to look at the CPU of the computer. What is CPU? Not the one on the internet, he/she is in CPU, you terrier! ! ! CPU is the computing core of a computer, and its performance will directly determine the ultimate computing power of this notebook computer. Simply put, it wants to be a human brain, so it's easy to understand ~

Intel and AMD are two major manufacturers of notebook CPU in the market. AMD is chosen for those who don't have high requirements for computers and usually play more games. Why? Because it's cheap. The stability of the processor is a very metaphysical thing, but in my opinion, stability is for people with sufficient budget. For more than 90% consumers, cheapness is more important than stability. Because it is obviously not worth spending thousands of dollars on the poor stability of a few tenths of a percent.

Also, there is an ixx at the back of the computer model. Both i5 and i7 can be used, so don't buy i3, it has been eliminated.

Meaning of CPU suffix on general notebook:

h？ Standard voltage? I7 10870H R5 4600H is commonly used in high-performance notebooks for games.

u？ Low pressure? R5 5600U？ Thin and light books/versatile books are more common.

G7 Intel Iris XE nuclear display is common in thin and light notebooks/all-around notebooks, and has certain graphic performance.

Second, the graphics card.

Graphics card is an important component after CPU, also called graphics card, video adapter, graphics adapter and display adapter. It is the "bridge" between the host and the monitor, controls the graphic output of the computer, and is responsible for processing the image data sent by the CPU into a format that the monitor can recognize, and then sending it to the monitor to form an image.

Graphics cards are divided into collective display, nuclear display and independent display. The difference is that:

Jixian

Generally, there is no video memory, but a part of the main memory of the system is used as video memory, and the specific amount is generally automatically and dynamically adjusted by the system according to needs. Obviously, if the integrated graphics card needs to occupy a lot of memory space, the impact on the whole system will be more obvious. In addition, the frequency of system memory is usually much lower than that of discrete graphics cards, so the performance of integrated graphics cards is not as good as that of discrete graphics cards. Only suitable for work, watching videos, etc.

Nuclear display (core graphics card)

Refers to the graphics processing unit integrated in the CPU, which is integrated with the CPU. Relying on the powerful computing power of CPU and intelligent energy efficiency adjustment design, the image processing efficiency is further improved, and the overall power consumption of core components is reduced, which is more conducive to extending the battery life of notebook computers.

Nuclear display memory is matched with CPU memory * * *, and friends who like custom settings can also change memory in BIOS. Many laptops say that the set monitor is actually a nuclear display.

Discrete graphics

It is to make the display chip and related devices into a board independent of the computer motherboard and become a professional image processing hardware device. Its performance is far superior to the onboard graphics card. It can not only be used in general work, but also has perfect 2D effect and powerful 3D level. Therefore, it is often used in desktop computers and notebook computers, and is suitable for large-scale operations such as playing games.

Generally speaking, it is enough to choose an integrated graphics card, and it is more expensive to display it separately.

Third, the screen

The screen is the interactive carrier between the computer and the user, and a good screen will immediately enhance the experience of daily use. The viewing angle of IPS screen is better than TN screen, so IPS screen is basically recommended at present, and the default resolution is above 1080P.

If the budget is very low and there is no need for retouching, you can choose 45%NTSC color gamut or IPS screen without color gamut, which has poor screen quality. When buying a laptop, the details of the business will generally indicate the quality of the screen. If you don't mention the value of the screen color display, it is generally the worst screen by default, only that the high refresh rate doesn't mention the default low color gamut. Therefore, when buying a second-hand notebook, ask the seller's computer model first, and then go to official website to search for relevant content introduction.

Fourth, the hard disk.

Hard disks are divided into solid-state hard disks and mechanical hard disks. The main differences between them are:

Mechanical hard disk

The capacity is relatively large and the price is not high, which is the advantage of the mechanical hard disk. At the same time, its reading and writing life is long, and many people who back up data will choose mechanical hard disk, but its reading and writing speed is very slow! Moreover, it is not resistant to falling and is easy to be read because of bumping. Many desktop computers will use mechanical hard disks as storage disks and solid-state hard disks as system disks. At present, notebook computers should try not to choose mechanical hard disk, which needs attention.

Solid state disk

This is the mainstream hard disk form at present, with fast reading and writing speed, small size, diverse appearance and many advantages. The disadvantage is that the price is higher under the same capacity! At the same time, because the solid-state hard disk is very dependent on the quality of flash memory particles, it also leads to poor quality control. Please remember to compare more when choosing.

Personal advice:

If you want to buy second-hand notebooks online, it is recommended to go to the idle fish or turn around the second-hand platform. Xiaobai, don't go fishing, it's easy to be cheated.

If you don't need to play large-scale games or games that eat graphics cards, it is enough to choose a laptop with centralized display by using professional software such as PS and AI. On the contrary, you must choose a machine with a discrete graphics card.

Try not to choose mechanical hard disk for notebook computers, and choose solid-state hard disk.

Check the appearance, whether there is deformation and paint loss caused by bumping, whether there is obvious wear on the C-side palm rest, touchpad and keyboard, whether there is a gap at the joint of the notebook, and check whether the rotating shaft is open and closed normally.

Plug in the power supply to power on the computer, and check whether the screen is damaged, such as scratches and indentations.