Concepts that must be known when purchasing a computer

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CPU

Q1: What is "Fast relaxation"? Is it fast relaxation with the Pentium-M processor?

A: "Fast relaxation" is not simply a processor. It is a general term for a system that includes a processor, a chipset, and a wireless network card. Strictly speaking, the processor in the "Fast relaxation" system can only be a Pentium-M processor, not a race-M processor. Therefore, only models configured with "Pentium-M processor + intel 855/915 chipset + wireless nic" can be referred to as "Fast relaxation ". Consumers can identify the "Fast relaxation" model using the butterfly sign on their laptops.

Q2: What is the difference between the Pentium-M processor and the Sai Yang-M processor?

A: The core and architecture of the Pentium-M and cyyang-m processors are the same. There are two main differences: Pentium-M supports intel speedstep technology that automatically reduces frequency and saves power, this technology is not supported by SAI Yang-m, which is twice higher than the second-level cache of the same core, for example, the binary cache of the Pentium-m using Banias core is 1 m, and the Sai Yang-M is only 512 K.

Q3: is the performance of the Pentium M processor significantly different from that of the Sai Yang M processor?

A: Unlike the huge performance gap between the server and Pentium processor, the performance of the race M processor is only about 10% lower than that of the Pentium M processor at the same frequency.

Q4: Why can some ciyang-m processors automatically reduce the frequency?

A: Some models use software to reduce the frequency of the sayang M processor, which is different from the theory that the Pentium M processor uses a multiplier to reduce the frequency, the frequency is reduced by reducing the external frequency, which will lead to a decline in system performance. Friends who are familiar with the Platform know that frequent replacement of the external frequency will have a negative impact on some devices.

Q5: Can AMD's processor automatically reduce the frequency?

A: AMD processors support "powernow!" similar to speedstep !" Technology can automatically reduce the frequency, but there is still a gap between the effect and speedstep.

Q6: Can the saiyang M processor access the Internet wirelessly?

A: whether or not wireless Internet access is only related to whether the model is equipped with a wireless network card, but not the processor. For example, Apple's iBook G4 series does not use the Pentium M processor, but can use the AirPort Extreme wireless Nic for wireless Internet access.

Graphics

Q1: What is the difference between an independent and integrated video card? What are their respective features?

A: The display chip of the Integrated Video Card is integrated into the main board. If there is no video memory, it can only be shared with a certain amount of memory. The display chip of the independent video card is not integrated into the main board, memory is independent and does not need to be occupied.

The integrated graphics card features a general performance, but it can basically meet the needs of some daily applications. The calorific value and power consumption are relatively low compared with the independent graphics card and need to occupy the memory. Although the performance of the independent graphics card is strong, the heat and power consumption are relatively high, and the memory is not occupied.

Q2: What are the current independent graphics card models? What is the performance?

Answer: The mobility Radeon series of ATI: 9200, 9600, 9700 (9700se), x300, x600, and x700; NVIDIA geforce go series: 6200tc and 6600.

Performance Comparison (in the case of 64 M memory ):

X700 (128bit)> 6600> x700 (64bit)> 9700> x600> 9600> 6200tc> x300> 9700se> 9200

Q3: Why is the score low when I use a battery to test the video card?

A: In a battery environment, the video card will reduce the frequency of the display chip, and the naturally tested score is not high.

Q4: Can I change the video memory of an Integrated Video Card?

A: You can set the video memory size of the integrated video card in the BIOS. The maximum video memory size depends on the degree of support of the chipset. For example, Intel 855gm/GME supports up to 64 m, while 915gm supports up to 128 M.

Q5: Can I upgrade my laptop's graphics card?

A: No matter whether it is an independent video card or an integrated video card, it cannot be upgraded at present (excluding independent video cards using special interfaces ). Therefore, you must think about it before you purchase it, and purchase it based on your own needs.

Memory

Q1: My current model uses DDR memory. Can I upgrade it to DDR2?

A: No. The main reason is that the gap between the two is different on the golden finger, resulting in incompatibility. The memory slot of the notebook is fixed on the motherboard, so it is basically impossible to change the slot.

Q2: Why is the memory missing?

A: The Integrated Video Card occupies a certain amount of memory. In addition, if you choose NVIDIA's geforce go 6200tc graphics card, although the 6200 is an independent graphics card, it supports the "turbocache" technology and allows you to allocate a certain amount of memory to improve performance.

Q3: How can I enable dual-channel access?

A: Intel's 915gm/PM chipset is the only one that supports dual channels. This technology is not available for 855 series chipset. Secondly, the 915 chipset only supports DDR2 dual-channel memory, which means that the DDR memory cannot enable the dual-channel. The last two channels are enabled in the BIOS.

Q4: Does amd support dual channels?

A: The key to whether amd models support dual channels is to check whether amd processors are supported, regardless of whether the chipset supports dual channels. However, amd mobile processors currently released do not support dual channels.

Q5: After the memory is upgraded, do I need to retain the original memory?

A: It is best to keep it because some brands have strict warranty requirements. If you change the memory, you may lose the warranty right. (Of course, this is not absolute. Some brands only do not provide warranty for the memory replaced by the consumer during maintenance .)

Screen

Q1: what are highlights, hidden points, and bad points?

A: The highlights are commonly known as colored spots, while the hidden spots are black spots when the screen is completely white. Bad points include highlights and hidden points. Bad Points are generated during LCD screen manufacturing and cannot be repaired. The national standard for bad LCD points is very low, and 12 bad LCD points are qualified.

Q2: What is the visual angle?

A: The Visual Angle determines the size of the user's visual range and the optimal viewing angle. If it is too small, the screen will be eclipsed if the user slightly deviates from the front of the screen. Generally, users can choose from a visual angle of 120 degrees.

Q3: What is the response time of the notebook LCD screen?

A: Generally, the shorter the response time, the better. The shorter the response time, you will not feel the trace of "dragging" when looking at high-speed mobile images. According to the human response time, if the response time exceeds 40 ms, the moving image will be delayed. Most of today's laptops adopt LCD screen response time of 25 ~ About 30 ms.

Q4: Is the LCD screen brightness adequate?

A: The brightness of a notebook LCD screen is about 150 lumens, which is sufficient for daily applications. The brightness of the highlighted LCD screen is 250 lumens, and the brightness of the nec LCD screen with WSSV technology is 320 lumens.

Q5: What problems do I need to pay attention to when using the LCD screen?

A: The LCD screen is a very fragile part. If the top cover is not hard enough, be sure not to press heavy objects on it. Do not scratch the surface of the LCD screen. It is best to stick a protective film. When the notebook is idle, it is best to turn off the LCD screen to prolong the service life.

Weight

Q1: What is the body weight?

A: It does not include the laptop weight when battery and power adapter are used. It is also called bare metal weight.

Q2: What is travel weight?

Answer: The total body weight, battery weight, and power adapter weight. For an External Optical drive model, the weight of the optical drive is not included.

Q3: What is the battery weight? What about the power adapter?

A: The weight of the battery depends on the number of cores. The weight of a 3-core battery is about 2Kg, and that of a 6-core battery is about 0.3 ~ Between 4Kg, the weight of 12-core battery is 0.6. The weight of the power adapter is generally 0.4 ~ 5kg.

Q4: What is the weight of a travel magazine?

A: For ease of carrying, removable optical drives can be replaced with travel magazines, reducing the weight by about 4Kg.

Battery

Q1: what do 3-core and 6-core batteries usually refer? Is it related to the battery capacity?

Answer: 3-core and 6-core are the number of cores in the battery. The more cores the larger the battery capacity, the longer the use time.

Q2: what types of battery are available for the notebook?

Answer: There are Ni-Ni batteries, Ni-Ni batteries, and lithium batteries. They are generally expressed as Ni-Cd, Ni-Mh, and Li. In recent years, a fuel cell has emerged in the notebook field. Today's laptops generally use lithium batteries, but a few models still use the obsolete Ni-MH batteries. Consumers can identify them from the battery mark.

Q3: Why does the manufacturer only provide one-year battery warranty?

Answer: lithium battery has a short service life. Generally, lithium battery is charged for only 800-times, and the product with special improvements is only charged for more than Times. It will be scrapped in about 2 years.

Q4: Why is the battery unavailable for the manufacturer's nominal time?

A: The test conditions are different. Some manufacturers use 8-core battery for testing, but the user is given a 6-core battery; some manufacturers use to turn off allProgramReduce the brightness of the LCD screen, disable the power consumption interface and other means to measure the use time, which is impossible in daily applications. Some vendors only use software testing, and the software may cause errors.

Q5: What should I pay attention to when using and saving batteries?

A: Pay attention to these problems during use: the initial charge must be filled for more than 8 hours, And the lithium battery should be fully activated. Do not discharge excessively; it is best not to use a battery while using a power adapter.

Note: It is best to charge the battery once a month. Do not fill the battery at the time of storage, and add 40% ~ 50% of the power is suitable; put it in a dry and shade place.

Interface

Q1: What is the purpose of the 1394 Interface?

A: The 1394 Interface is divided into four-pin and six-pin interfaces. It is used to connect to a digital camera to transmit image data. Today, the general notebook uses a 4-pin interface, for the external optical drive model, generally uses a 6-pin interface to connect to the optical drive. Of course, the 6-pin 1394 Interface is used on the Apple laptop.

Q2: What is the purpose of terminal S?

A: The main purpose of terminal S is to connect the notebook to the TV and input the screen on the computer to the TV.

Q3: What is the purpose of a card reader?

A: The main purpose of the card reader is to transmit the image data between a digital camera and a laptop. Nowadays, many digital cameras use memory cards or memory sticks. card readers can read and transmit data from these memory cards and memory sticks to their laptops.

Q4: What are the functions of PC card slots?

A: The PC Card slot is equivalent to the desktop's PCI slot. The difference is that the PC Card slot can be plug-and-play. Therefore, you can use a PC Card for different purposes to implement certain functions. For example, a PC wireless network card can be used to achieve wireless Internet access; a pc TV receiver card can be used to watch TV; a PC sound card can be used to enhance sound effects.

Q5: is the distribution of USB interfaces very important?

A: It is important and directly related to the comfort of use. If the design is too crowded, there will be conflicts when using multiple USB devices; if the design is only on the left side, it is not convenient to use the mouse. Therefore, the distribution of USB interfaces is also important for a good model.