What we call the power of the computer is the total power consumption of the computer, including the following major equipment power consumption: 1. CPU, 2. graphics card, 3. hard disk, 4. motherboard, 5. optical drive, 6. memory, 7. network card 8. sound card, 9. power supply of their own losses, 10. monitor. The following is an overview of the power of each device:
1. CPU: CPU is the heart of the computer, but also the computer's main energy consumer. Now INTEL's P4 mainstream CPU power maximum of not more than 84 W. For us to do CAD drawing, we use the CPU due to most of the time waiting for the task and seldom run at full capacity (CPU utilization in WINDOS2000 task management can be seen, the general use of the 50% or so), so the general situation CPU probably work in the 50W less than the appearance of the P3 CPU power maximum of more than 60 watts, P2 CPU power maximum of more than 30 watts of the appearance of the AMD CPU generally consume more power. However, the computer is constantly evolving, and now INTEL's latest model of the CPU is said to be able to reach the power of 150W, and the use of different environments, different processing tasks, the same model of the CPU power consumption are different. For general office computers, due to the processing of the task is not heavy, the CPU is used most of the time in the case of non-full load, the CPU power is generally not more than 50W (in fact, a lot of time we use the P4 computer office, do the work with the P2 is almost the same, so the power consumption is not large). And for those who need to often do 3D effects and love to play the game players, the CPU needs to run under a very high load, power consumption is also large, and those computers are high-break computers, many people also love overclocking, so the CPU power should be calculated at least 80W, taking into account the needs of the future development of the CPU power can be taken as 150W. so it is recommended that the game-oriented advanced Internet cafes, residential, and the need for So it is recommended that advanced Internet cafes, houses, and computers that need to do 3D work should consider 150W for their CPU (for future plans).The CPU fan, as a necessary device to cool down the CPU, can be calculated at 5W.
2. Graphics card: Graphics card is the computer's graphics processing center, due to the different groups of different requirements of the graphics card, so the graphics card power consumption is also very different, from a dozen watts of integrated graphics cards to seventy-some W high-end mainstream graphics cards are widely used. However, even for the same model of graphics card, there is a huge difference in its power when used in different environments. The following is a quote from a review of the GeForce 6800Ultra published by the Hong Kong website HKEPC: HKEPC used an ordinary ammeter for the test, and then made an approximate calculation of the power afterward. In 2D mode, the input current of 5V is 1.86A, which is about 9.3W, while the current of 12V is 1.97A, which is about 23.64W, which is a total of ****32.94W. In 3D mode, the amplitude of the current is very large, which all depends on the workload of the GPU and the complexity of its picture. We utilized 3DMark03 for the test, and it turned out that the most complex work was not Game4's MotherNature, but rather Game4's MotherNature. It turns out that the most complex task is not Game4's MotherNature, but Fill-Rate (MutilTexture). In this test, the input current of 5V is 3.01A, which is about 15.05W, while the current of 12V is 4.50A, which is about 54W, or a total of ****70W. As you can see from the above data, the difference between the same model of GPU in processing 2D graphics and 3D graphics is more than double. For our general office computer, as most of the use of integrated graphics, power consumption is the maximum of more than 10 watts, generally not more than 15W even if the use of non-integrated graphics, but also the use of low-end graphics, power will not be more than 20W, it is recommended to take 20W. For the game-oriented advanced Internet cafes, residential, as well as the need to do a lot of frequent 3D computers, in order to the future needs of the development of the proposed 100W.
3. Hard disk, the power of the hard disk is not big, the current maximum power of the ST hard disk is 12.5W, the notebook is only about 5W. And we do not frequently write and read data from the hard disk, so usually the hard disk most of the time working in the no-load situation, the power is only about 5W. As the future of large hard disk is the development trend, so taking into account the development needs, can take the hard disk power for 15W.
4. motherboard, motherboard itself does not consume a lot of power, taking into account the development needs of the future, take the power of 20W.
5. CD-ROM drive: the CD-ROM drive's power consumption is generally about 10W, taking into account the development needs of the future, take the 15W.
6. memory, network card, sound card, and the power consumption of the hard disk. Network card, sound card power consumption is very low, due to the lack of specific data, but the three add up to the total **** will not be more than 20W of power consumption, according to 20W.
7. Power supply. The power supply is the most critical equipment required for computer operation, the lack of it or it does not run properly will bring adverse effects to the operation of the computer or even produce accidents, but also our focus on the object. Current in the front rectifier filter circuit after the soldiers divided into two ways. One way is the constant power, that is, the output is +5VSB, it is a standby voltage, supplied to the motherboard, that is, the power supply does not start when the output to the motherboard, used to be responsible for the network startup, keyboard startup and soft start, etc., the maximum power will not be more than 20 W. But we usually rarely use those functions, so there is almost no loss of power in general. The other way is a circuit that can only be powered when the power is on, and is responsible for powering the CPU and other devices mentioned above. Also, because of the transformer and shaping filter circuits inside the power supply, there is some power loss when the computer bit is working, as long as the power supply is connected to the circuit. The power supply's own losses are estimated at 5 watts.
There is also the power factor of the computer power supply is a very important aspect of our concern. For computers and all other electronic circuits that work on DC voltage, it is simply impossible to work without reactive power. In order for computer circuits to work properly, they must be provided with a smooth DC voltage. This "smoothing" work must be connected to the computer power supply rectifier behind the filter capacitor C to complete. This filter is like a reservoir, the capacitor must store a sufficient amount of charge, in the gap between the rectifier half-wave, so that the circuit on the operating voltage is still uninterrupted, can maintain a normal level.
In other words, even when there is no input power between the two pulsating half-waves, there is no significant change in the voltage level of Uc. This function is realized by the energy stored in the capacitor, and this energy stored in the capacitor is reactive power. Therefore, the computer is to rely on the support of reactive power to ensure that the circuit correctly using active power to achieve normal operation.
So it can be said that computers not only need active power, but also need reactive power, both are indispensable! A recent study by PCMagazine showed that the typical power factor of a computer is 0.65.
8. Monitors: monitors can be calculated according to the 100W, but with the development of the future, LCD monitors will become more and more popular, LCD monitors have a very low power consumption of less than 50W.
In addition, the power of the computer's speakers and other peripherals can be calculated at 30W.
In summary, the power calculation of the computer should be in accordance with different occasions and different requirements to separate calculations. For the general office environment, the computer's power is roughly: CPU50W + graphics card 20W + hard disk 15W + motherboard 20W + CD-ROM drive 15W + memory, etc. 20W + power supply 5W + speakers 30W + display 100W = 275W, if you don't need the speakers and CD-ROM drive occasions, roughly 230W, I calculate the capacity has been calculated by the front of the current state of the office computer
In addition, the computer power supply due to more inductive loads, so the outside equipment to produce induced current and leakage may be greater. When we disassemble the computer, we usually wash our hands first to release the static electricity on our body so as not to cause harm to the equipment, but because of washing hands, the resistance of the human skin will be reduced. So every time we touch the computer will encounter a strong leakage, and leakage current is still relatively large, the hand will feel numb feeling, so I think the computer socket should be set up to protect the line, it is best to install a leakage protection device, especially for those who are children have the possibility of contacting the computer body of the occasion, it is more important to pay attention to the leakage protection of the computer.