Author of this article: Sanshierli
Front row reminder: Novice is not scary, what is scary is that novice who is too lazy to check on Baidu. Using search engines is more reliable than any popular science!
Preface
618 is coming, and laptops will usher in a large number of historically low prices, which is a good opportunity for friends to buy. Based on the principle of letting new friends lose their pockets, I decided to share notebook purchasing knowledge with you in three articles, hoping it will be helpful to friends. There is no recommendation in this article, no recommendation in this article, no recommendation in this article, it is purely popular science, and only by knowing yourself and the others can you choose the book you like!
article: Pure theory, basic knowledge of notebook science
article: Pure recommendation, thin and light laptop models recommended within 6,000 yuan
article: Pure hands-on, unboxing and inspection, reinstalling the system, disassembly and upgrade, precautions
Purchase channel
▍Don't go to a physical store to buy a computer!
▍Don’t believe in offline channels such as “relatives”, “friends”, and “acquaintances”: half of the life trap, acquaintances Grand Slam!
▍Don’t believe in “campus agent” and “QQ group agent”
▍The first choice for buying laptops JD self-operated, official website, Tmall flagship store: is not activated for seven days without reason, return for 15 days, return and exchange for quality problems.
▍The price of notebooks in online stores (especially JD) often fluctuates, but there are almost some good prices every month. It is recommended to be patient and wait.
extended reading: How to understand that you cannot go to physical stores for buying a computer
notebook classification
▍ Collection graphics: Most of them are below 1.8kg, use the integrated graphics card that comes with the CPU, without independent graphics card, and there are many products below 1.3kg, which are light and portable, extremely suitable for daily life, business trips, office work, can play ordinary games, and include mainstream LOL (medium and low picture quality).
▍Omnipotent book: Most of them are below 1.8kg, equipped with low-voltage CPU + MX series belt-based graphics cards (only a little stronger than the integrated graphics card), you cannot play large-scale game , and you can play LOL and other ordinary games smoother. The independent graphics are not helpful for daily office work, but will have higher temperatures and worse battery life.
▍Game notebook: Most of them are more than 2kg, equipped with standard CPU + GTX/RTX series strong graphics cards, suitable for playing chicken and 3A large-scale games, and are also suitable for professional work such as graphics rendering , etc.
Note: The above classification is just a rough segment, not absolute. For example, XPS15 has standard CPU integrated display configuration.
CPU
2018 data comes from: Cuttlefish laptop computer group
▍Preferred to Intel series, (same level) low power consumption, good stability, stronger instantaneous turbo frequency, Tencent game Intel has more advantages.
▍In the past two years, the gap between AMD and Intel has been greatly reduced. If the budget is low, it is more reliable to buy AMD low-voltage CPU, but AMD's battery life is obviously worse.
▍Usually, the last CPU model with "U" is a low-power CPU. This type of CPU generates little heat, consumes low energy, gives longer battery life, and does not have the standard pressure. It is suitable for light and portable, business office notebooks.
▍Usually, the last digit of the CPU model does not have letters or H is a mobile standard CPU. It has extremely strong performance, but it has high heat, high energy consumption and poor battery life. It is often used in gaming laptops.
▍Watching videos, simple games, text editing, and software development does not cost CPUs, mainstream low-voltage CPUs are enough; playing large games, graphics rendering and other professional work takes CPUs, and mainstream standard-voltage CPUs start.
▍Don’t buy Intel’s 7th generation or earlier CPUs (such as i5-7200U and i7-7500U). The 8th and 8th generations (such as i5-8250U and i5-8265U) will press the 7th generation on the ground and hang it: the performance of the i5-8250U is 30% higher than that of the i5-7200U, and can even beat the 7th generation i5 standard pressure. Reference
▍The idea of "low-voltage CPU is a castrated version, and low-voltage performance is poor" is outdated. Low-voltage CPUs test more about process, and the 8th generation low-voltage CPU can definitely deal with most things, so there is no need to worry about performance issues!
▍On laptops, AMD CPU only recommends buying the low-power R5-3500U, which has significantly improved performance and energy efficiency ratio.
2019 data comes from: Biba Evaluation Room
▍Intel low-voltage CPU recommended to choose i5 (8250U, 8265U, etc.) . Under the same TDP, the performance difference between i5 and i7 is extremely small (see the ladder map), but i7 is generally 1,000 yuan more expensive than i5, and the cost-effectiveness is very low.
▍Character pressure CPU is also recommended to choose i5 - cheap, only graphics rendering and other things that require i7 standard pressure. However, what is a bit incredible is that the i7 of the same mold is better controlled than the i5 for cooling under standard pressure. Extended reading: Do we have to have an i7?
▍The laptop cooling module determines the release of CPU performance. Laptops with poor heat dissipation will reduce the frequency when the CPU is overheated and cannot reach the level of the CPU, so it is not enough to buy the highest configuration. Reference model: MacBook Pro i9!
graphics card
2019 data comes from: notebookCheck
▍ Graphics cards are divided into integrated graphics cards and independent graphics cards. The CPU comes with an integrated graphics card, and the motherboard is an independent graphics card.
▍Independent graphics cards have significantly improved gaming and graphics design, but independent graphics brings greater heat and power consumption, and not everyone needs independent graphics cards!
▍Intel low-voltage CPU integrated graphics is UHD620; standard voltage integrated graphics is UHD630; AMD low-voltage CPU integrated graphics is RX Vega8, and its performance can almost beat the MX130/110 independent graphics card. The integrated display can play LOL.
▍Suggestion: Don’t play or play simple games in daily life, just work, watch videos, code words, etc., and try to choose collection and display books.
▍The mainstream MX series is a low-end independent graphics card, which is beneficial to ordinary games or light and medium PS, and cannot play large-scale games. MX110 and MX130 are not recommended to purchase graphics cards. MX150/250 is slightly better (these two products are also divided into full blood and residual blood), which can make LOL smoother and you can buy it. Extended reading: The significance of the existence of introductory graphics cards.
▍Suggestion: Play LOL often or PS graphics frequently, try to buy MX150/250 all-around notebook with strong heat dissipation and good performance.
2019 data comes from: Lonely Phoenix Warrior
▍GTX and RTX are mid-to-high-end graphics cards, suitable for playing large-scale games and graphics rendering. The new generation of mobile graphics cards in 2019 has also come out. From the above ladder diagram, it can be seen that the layout of new graphics cards this year is very different: RTX2060GTX1660TiGTX1060GTX1650.
▍In fact, most people cannot use RTX2060 ray tracing. In this context, the GTX1660Ti is undoubtedly the most cost-effective independent graphics card. If you want to play games smoothly, it is a good choice to grit your teeth and use the GTX1660Ti. If you want to settle for the second best, it is recommended to buy the previous generation of GTX1060, followed by the new GTX1650.
extended reading: Mobile version 16 series GTX graphics card performance review
memory
▍Performance comparison: Two 8G dual-channel memory single 16G single-channel memory, doubled the bandwidth of the dual-channel memory, and the integrated graphics bank is greatly improved.
▍AMD Ryzen APU platform can only use dual-channel memory to play its advantages, so many Ryzen books have dual-pass memory.
▍Many thin and light notebooks use onboard memory (soldered on the motherboard) to reduce space and energy consumption, and have no ability to expand memory. Only those with slots can upgrade memory. Pay attention to doing your homework when purchasing.
▍LPDDR3 low-power version is commonly used for on-board memory of mid-to-high-end laptops. It is not DDR3. The low-power version of the memory can bring lower energy consumption and longer battery life.
▍Memory performance is mainly determined by capacity, frequency and timing. The higher the frequency and the lower the timing, the stronger the performance. The performance of high-quality and low timing is no worse than that of DDR4. Extended reading: LPDDR3 Vs DDR4.
▍Onboard memory does not include LPDDR4, which is not the manufacturer's fault, but the Intel platform does not provide LPDDR4 support.
▍The current mainstream notebook memory is DDR4, with frequency 2400mHz and 2666mHz. Recommended memory for to form dual channels: same frequency and same particle, better compatibility.
▍Daily office, entertainment, and movie users, using 8G memory (no LM software installed) is enough. Of course, the higher the memory capacity, the better. This principle is correct!
▍Programmers do not depend on CPU and have higher memory dependencies. Local servers, databases, and virtual machines consume memory. It is recommended to try to exceed 12G.
▍The mainstream first-line memory stick brands are Samsung, Hynix, and Magnesium. These three brands have the ability to produce their own memory particles. OEM memory is generally used in these three brands, and some notebooks use Kingston, Memory Technology, etc.
▍Samsung, Hynix, and Micron do not have retail sales, but some online stores can get genuine memory, which requires certain identification capabilities.
▍Kinston retail marketing first, but it does not have the ability to produce self-produced memory particles. It is to take the particles from large factories and then package them.
▍My personal thoughts: if you buy Samsung’s original, you can buy Samsung’s same frequency memory; if you buy Hynix or Kefu’s same frequency memory; if you buy Yingruida’s same frequency memory. If you are worried about encountering fake notes, it is recommended to add memory to JD self-operated Yingruida.
Samsung (left) Hynix (right) Memory stick
▍Samsung Hynix Magnesium identification method: 1) There are dense electrical holes for light sources 2) The production cycle of the front sticker and the back particles is similar 3) Samsung and Hynix PCB boards have brand LOGO 4) Samsung and Hynix have white resistors 5) Experience, look at the PCB board lines.
extended reading: add Samsung memory, add Hynix memory, install Kingston memory, original Samsung Hynix microscope authenticity
solid state hard drive
▍9102, it is recommended to buy laptops with solid state hard drives (SSDs). Most of the computers that only provide mechanical hard drives (HDDs) are from the factory are leek machines!
▍An example: R5-2500U+8G*2 memory + 500 mechanical hard disk boot time 1 minute, start the local Tomcat server for 10 minutes +; R5-2500U+8G*2 memory + 500 solid-state hard disk boot time 10 seconds, start the local Tomcat server for 3 minutes! Conclusion: The first choice for to improve system speed is to replace the mechanical hard disk with solid-state hard disk .
▍ Currently, there are two types of mainstream solid-state drive interfaces: M.2 interface and Sata3 interface. The Sata3 interface is generally the mechanical hard disk interface, which can also be connected to solid-state hard disks.
▍About speed: M.2 Nvme M.2 Sata = Sata3 SSD mechanical hard disk.
▍ Currently, mainstream notebooks have M.2 interfaces by default, and the original SSD solid state is also installed on M.2. Most thin and light notebooks have cancelled the HDD hard disk bit.
M.2 interface and M.2 solid-state
▍Not all notebooks' M.2 interfaces support Nvme and Sata protocols. Thinkpad E485 only supports M.2 Nvme, while the M.2 of Lenovo's old model E42-80 only supports M.2 Sata. Do your homework before purchasing, so don't be incompatible. Extended reading: E485 installs M.2 Nvme, E42-80 installs M.2 Sata.
▍Most of the current business books still retain the habit of HDD hard drive bits, and they are empty when they leave the factory. Those with conscience will come with a hard drive cable. Those who are not meant to buy a hard drive cable by themselves. Pay attention to know whether the factory has a hard drive cable when installing Sata3 solid state. Extended reading: XPS15 self-purchased hard disk cable and Sata3 solid state installation.
Sata3 interface and 860Evo solid-state drive
▍The daily experience of using Nvme and Sata is not much different. You can only feel the difference when you continue to read and write files. Buying Sata is cost-effective, but the running score is low.
▍What really affects the solid-state drive is the particles, main control, and cache solutions, especially the particles, which are divided into main film, white film and black film. It is recommended to buy main film . Extended reading: What are the black and white films that are often mentioned in solid state drives.
▍ Most of the solid-state drives that come with laptops will be purchased from Samsung, Toshiba, Western Digital, Intel, Hynix, and other original OEM solid-state that can produce self-produced particles. The stability is generally not too bad. It is just that you use M.2 Nvme for conscience, and use M.2 Sata or 128G 2242 small-size solid-state for stinginess.
▍Kingston and Lenovo solid state with high sales are relatively stripped of solid states. There are many pitfalls in low-priced solid state, please refer to read 2.
▍In terms of warranty, original original films are generally guaranteed for 5 years: Samsung retail solid-state insurance for 5 years, Intel warranty for 5 years must have an invoice, Western Data warranty for 5 years, try to purchase JD self-operated (Sousuxis Express), Pukete warranty for 5 years, SF Express for free.
▍For newcomers, try to buy large-capacity solid-state drives above 512G, and do not install too much hard disk storage. Extended reading.
extended reading: 2019 main consumer-grade solid state.
screen
▍9102, please guarantee to purchase an IPS screen with 1920*1080 resolution.
▍The second most screen material is the low-end TN panel: poor viewing angle, poor picture quality, easy to have color distortion, whitening, and the experience effect is not very good, commonly known as TN blind screen. This material screen theory should be extinct, but there are still bad manufacturers using it.Nowadays, the mainstream material is IPS.
▍The screen is also divided into different levels, and there are many indicators for evaluation, but one standard is something that ordinary people can sense: color gamut!
▍The color gamut represents the color range covered by the screen. A picture, a screen with a high color gamut will look more vivid and realistic.
▍There are many color gamut standards, usually the standard is: 45%NTSC 72%NTSC 100%sRgb 100%AdobeRgb DCI-P3. This is just a simple comparison, and the color coverage of different standards is different.
E480 768P TN screen
E42-80 1080P screen
E485 1080P 72%NTSC screen replacement
▍5000 yuan, 13-inch laptops are mostly high-color gamut screens, so a good screen with a low budget is preferred for 13-inch screens.
▍ Within 6,000 yuan, 14- or 15-inch laptops have several high-color gamut screens!
▍It doesn’t mean that the low-color gamut screen is helpless, there is another way out: change the screen! Generally, 72% NTSC color gamut screen costs 300 yuan per yuan. If you buy it, change it yourself, it will be easy!
Thinkpad screen change job
▍Screen resolution is the number of pixels on the screen. The higher the resolution, the more pixels it can display, and the more content it can display. Currently, mainstream notebooks all use 1920*1080 resolution (commonly known as 1080P or FHD). Some mid-to-high-end models also use higher 2K (T490), 3K (Matebook X Pro), and 4K (XPS9380) resolution.
▍About the screen size, regular laptops all use a 16:9 ratio, and now there are 3:2 ratio laptops added (Microsoft Sophie, Huawei Matebook series). This size laptop is very suitable for Microsoft Office document office!
▍Play FPS shooting games, please give priority to the e-sports screen (144Hz).
▍Of course, the quality of the screen does not only depend on the color gamut, resolution, but also on the viewing angle, brightness, response speed, refresh rate, etc.
extension reading
external interface
▍The number of external interfaces of different types of notebooks varies greatly. When purchasing, be sure to pay attention to whether the interface type and quantity meet your needs.
and 66 second-generation business notebook complete interface configuration
▍ Currently, well-known are: USB, Type-C, HDMI, RJ-45 network cable port, Thunderbolt 3, and VGA (almost extinct).
▍Different notebooks will be equipped with different numbers of interfaces. Now, in order to save space, many notebooks have castrated some unused interfaces in daily life, such as HDMI, RJ-45 network cable port and VGA.
▍Some notebooks have made drastic moves to cut off USB, leaving only TypeC (Matebook13, XPS13). For this kind of notebook, you may need to purchase a TypeC dock to meet daily work needs.
▍Note that TypeC also has different levels: full-featured TypeC means that it can both charge PD and DP external monitors, and transmit data. Many computers have TypeC but do not support PD or DP.
▍Thunder 3 is also the mainstream in the future. This interface has a very high bandwidth and is suitable for gaming with integrated graphics card docking.
▍In addition to driving the market for expansion docks, the popularity of Type-C has also driven another market: TypeC portable chargers. For colleagues who often travel on business, pay attention to the combination of thin and light notebooks + TypeC chargers, which will make your backpack hundreds of times lighter. Reference reading: EDC with charger is not required.
heat dissipation mold
▍ As mentioned earlier, the CPU should not only look at i7. The heat dissipation module of the notebook determines whether the current CPU can release its due performance.
▍The number/width of heat pipes, fan thickness/number/size, fin volume, air outlet position, computer thickness, and materials inside the notebook all affect heat dissipation.
▍Thin and light notebooks can generally more or less see the heat dissipation ability of this notebook by the number, size, curvature, etc. The typical examples are: burning 7000Pro and Xiaomi Pro, which also uses the i5-8250U+MX150 combination, which is also a 15-size notebook. The former burning 7000Pro single heat pipe single fan, which is rated as extremely poor in the heat dissipation level; the latter Xiaomi Pro uses single heat pipe dual fans, which is rated as good in the heat dissipation level.
Xiaomi Pro heat dissipation copy
▍Game notebook uses standard pressure CPU and high-end graphics card, which consumes a lot of power, and requires the cooling ability of the notebook mold. Game notebook must not only look at the configuration, but must look at the cooling review!
Lenovo Y7000 2019 cooling copy
▍Remind again: Don’t just look at the configuration when buying a computer. Laptops with poor cooling are useless even if the configuration is good!
extended reading: Why are Asus laptops cursed? (It looks a bit rhythmic)
wireless network card
▍ As a rarely mentioned object, it should be mentioned briefly: 802.11n and 802.11ac are two WiFi standards, and the more advanced one is 802.11ac.
▍ also supports dual-band, and the dual-band transmission speed of 802.11ac is twice as high as 802.11n. The 1X1MIMO antenna signal is much worse than the 2X2MIMO antenna signal.
▍In summary: Wireless network card is preferred for 802.11ac+2X2MIMO antenna. Intel's 8265AC, 9260AC and 9560AC are all well-known wireless network cards.
is equipped with 9560AC copy
▍Of course, if the original wireless network card of the laptop is poor, you can also consider spending dozens of yuan to replace the wireless network card (prevent the network card is not soldered on the motherboard). Extended reading: Replace the 9260AC wireless network card.
E485 Original web card (left) Replacement job
Other accessories
▍ Laptop keyboard feels very different. The thinner the more difficult it is to create a good keyboard. The key stroke is one of the key indicators of the feel, and the longer the key stroke, the better the feel.
▍If you are often used in dark light environments, please try to buy a laptop with a backlit keyboard. The experience is really different.
▍No matter how good the laptop keyboard is, it is not as comfortable as an external mechanical keyboard.
▍Fingerprint recognition and face recognition can replace passwords to achieve Windows login, and the experience has increased significantly by one level, but the sensitivity of fingerprint recognition depends on the manufacturer's technology.
brand after-sales
▍Any brand has a spicy chicken model, do not choose a computer based on the brand. Be sure to choose the corresponding product from the recommended models at the corresponding price according to your needs!
▍If someone around you says to you, “The performance of the xx brand is good, but the heat dissipation of the xx brand is poor,” such people will not be trustworthy!
▍About after-sales service, it is recommended that novices try to buy notebooks from first-tier manufacturers, as local after-sales service is guaranteed. The first-tier manufacturers "Yu Three" are: Lenovo, HP, and Dell. Asus and Acer are also pretty good after-sales service.
▍The after-sales service of second- and third-tier manufacturers is poor, but in the face of cost-effectiveness, they still recommend it: Huawei, Honor, Xiaomi, Shenzhou, Xuanlong, Mechanical Revolution, LG.
▍The mechanics, Thor, Naruto, etc. in the back row are not recommended. The after-sales and reputation are relatively average, the public model and the fourth-tier after-sales first-tier prices. If you have these three brand gaming laptops, my suggestions are: It is better to get on the boat and revolution!
▍Please pay attention to the after-sales rules of the notebook. Some brands of disassembled machines are not guaranteed. Some invoices are different in company or individuals. Be sure to read the warranty terms in the copy before purchasing.
and 66 second generation warranty are different from individuals and companies
▍First-line manufacturers' business warranty policies are relatively good. For example, Thinkpad and HP business machines provide one-year door-to-door service, and Dell Latitude high-end supports three-year door-to-door service and accident warranty. What are the advantages of accident insurance: If your laptop splashes water and the motherboard breaks down, accident insurance will be replaced and repaired for free.
A netizen's Latitude7490 warranty information
summary
▍Please advise parents and friends not to go offline if they can do so. It is more guaranteed to buy computers on the official website and flagship store online. If you don't listen to the advice, send them the examples of the crash at the beginning of the article to them.
▍Budget below 4,000 yuan is recommended to buy Ryzen R5-3500U. Of course, it is even better to buy i5-8***U.
▍Budget of more than 4,000 yuan, thin and light notebooks are preferred to recommend the eighth generation i5 CPUs such as i5-8250U and i5-8265U, which are cost-effective than i7 low-power U.
▍Slim and portable, without playing games or the game is not very powerful. It is recommended to purchase a lightweight integrated graphics card, which has a stronger battery life.
▍It is both thin and portable, and often plays ordinary League of Legends games. It is recommended to buy an all-around book with MX150/250 independent graphics card.Intel+MX independent graphics still is the standard gold for all-around gold, and as for Intel+AMD RX550 independent graphics, it is also an option.
▍The gaming laptop only recommends Intel standard pressure CPU, and most gaming i5 standard pressure is basically enough. The new generation of GTX1660Ti independent graphics card has been greatly improved, and the experience of this independent graphics card will be very good.
▍Value friends with weak hands-on ability should try to choose large-capacity solid-state drive laptops with a factory of 512G and above to avoid the hassle of disassembly and upgrade.
▍Involves graphic rendering work, 3D max, pr, ae and other software, priority is given to purchasing professional graphics card workstations, and recommended gaming laptops for those with limited budgets: priority is i7 standard pressure + high-end independent graphics, dual-channel memory can be as large as possible, and buy high-quality solid-state drives. Recommended configuration: i7-9750H+GTX1650 and higher +16G*2+SSD+high color gamut screen.
▍Laptop memory is divided into on-board and slots. If you want large memory, try to buy a laptop with slot, or an on-board 16G memory laptop.
▍The screen is of different levels. Try to buy a high color gamut, the screen will look much better.
▍When buying a laptop, be sure to do your homework, understand the external interface clearly, and see if it is suitable for you. For example, if you need to work in a place where you often plug in the network cable, try to choose a laptop with the RJ-45 network cable port.
▍Backlit keyboard, fingerprint recognition, TypeC charging, etc. are all plus points. Choose according to your needs and budget.
▍About brand: There are no brands of spicy chicken, only models of spicy chicken. Try to buy the laptop model in the online recommendation list, or take the model you like to go to the post bar and ask questions, and don’t be blinded by product introductions. Recommend a few recommendation lists of conscience notebooks: Biba Review Room, Zhihu Cuttlefish, Zhihu Xia Mengqian.
▍Xiaobai recommends buying notebooks from first-tier manufacturers such as Lenovo, HP, and Dell, and recommends buying large solid state of 512G and above, in one step to avoid tossing.
▍In terms of gaming notebooks, Xiaobai recommends purchasing the main gaming notebooks of first-tier manufacturers Lenovo and HP, and the cost-effectiveness is Shenzhou, Mechanical Revolution, and Xuanlong. Although it is a public model, the price is conscientious.
▍Any notebook has shortcomings and black spots, so you don’t have to worry as long as it is not your own pain point. There are bad reviews for every laptop product. Most of the bad reviews are caused by the buyer's personal situation, so don't worry too much.
▍Use search engines, check if you don’t understand, ask if you don’t understand, and you will eventually become a big shot.
article: Recommended thin and light notebooks within 6,000 yuan are being compiled, and we are still waiting for a message of a one-line 15-inch high color gamut notebook
