Common failures caused by bad power

Power is the power base of computer mainframe, is the power source of computer host accessories, power output current good or bad, directly affect the computer host accessories performance and service life. If the CPU is compared to the "heart" of the computer, then the power is the whole computer host "blood", the energy into the computer host of the various "organs" for these "organs" to provide enough oxygen, the computer can function normally.

The following is a list of some common symptoms that are caused by bad power:

1. Hard drive prone to bad, very easy to damage the hard drive, and caused data loss.

2. The system often random restart, blue screen, crash and so on.

3. The power supply is not enough to cause the main run-time power supply, chassis shell hair hot, high temperature.

4. The power supply voltage does not cause USB devices such as mobile drives to be unrecognized or only occasionally recognizable.

5. Optical drive Read disk performance is poor, often read disk crashes, optical drive service life shortened.

6. When the system load is high, it is easy to crash, and after overclocking, the operation is unstable.

7. Install more than one hard drive or optical drive device after the system does not start, or difficult to start.

8. Installation power consumption is larger than the video card can not start, game panic, video card driver error.

8. Because of the poor quality of the filter circuit to reduce the power supply, the output voltage ripple is large, resulting in sound card noise.

9. After entering the system, there is water ripple interference on the monitor screen. This can cause damage to vision in the long run.

10. When the computer starts, the interference to other electrical appliances, such as the sharpness of the television set down, the appearance of horizontal stripes or mesh lines.

11. The normal USB device is not recognized, may be related to the lack of power supply voltage.

12. The power supply is insufficient to cause the graphics card to "do".

There are many such puzzling computer failures that are closely related to the quality of the power supply.

These problems, in the computer forum is not uncommon, the questioner occupies a lot of forum layout. It can be seen that the computer malfunction caused by these power supplies really makes too many people suffer.

Faced with such a variety of problems, you will be in the selection of power when the same as before the extensive it? How do we identify a power source good or bad?

Computer power is actually a power converter, its role is to convert 220V 50Hz AC power to the internal components of the computer required for a variety of DC power. How the power works most of us don't need to understand, but there are some common sense hardware players should remember:

1. +5v (red Line): Mainly used for motherboard power supply (including memory). The optical drive signal circuit is also powered by the +5v power supply.

2. +12V (Yellow Line): Drives the disk drive motor and all fans.

3. +3.3v (Orange Line): For CPU, motherboard, PCI bus, I/O control circuit power. The current CPU and AGP voltage is getting lower and higher, so the new ATX specification adds +3.3 voltages so that the +5v is not converted to +3.3v.

4. +5VSB (stand by, Purple Line): and +5v voltage exactly the same, but own a circuit, with other power supply circuit independent, and the computer whether or not, as long as the power supply can always remain open state. This line is used for devices that can activate the system, such as a remote boot network card.

5. ps-on (Green Line): Operating System Management power switch, and +5VSB together collectively referred to as soft power, the realization of software switching machine, network wake-up functions. A short connection between green and black lines will enable the power supply to start.

6. -5v (white line), -12v (Blue Line): The current power supply of negative voltage is rarely used. Early and -12v lines are used with older devices such as ISA bus and COM ports.

7.PG (Power good, Gray Line): The PG signal cable is connected to the motherboard and is powered on by the monitor software of the motherboard. The system before starting voltage for internal inspection and testing is done through this line, if no PG signal is not able to boot.

From the above introduction, even if we shut down the computer, if not cut off the AC input switching power supply, standby power is always working, the power supply will still have 5 to 10 watts of power consumption. So the correct way is to shut down and unplug the host power. It's more convenient if you have a switch on the back of the power supply.

　Various output lines for power supply

Power in the work, itself there is the consumption of electricity, so the power itself is a "consumption of electrical appliances." And the power of power conversion of the time there is loss, the input power can not be 100% of the energy into the host to use the effective energy of the components, so there is a problem of conversion efficiency. Power conversion efficiency = power supply for the host to provide instant output power/input power to the instant power x100%. Conversion efficiency root power supply is not too much contact, the higher the conversion efficiency represents the power itself more energy-efficient, the input of the AC power to use more fully. The conversion efficiency of high quality power supply is generally over 80%.

All of us in the purchase of power should be concerned about the conversion efficiency of the power supply, as far as possible to choose the conversion of high efficiency products, so as to reduce the unnecessary power consumption, in order to protect our green home to do a good job. High power conversion efficiency also means that the power supply itself less heat, which is more conducive to reducing the temperature inside the chassis.

People often ask, "Why does my computer turn on when it's powered on?" In fact, the problem is in the +5v stand-by described above. Early ATX1.0 version only requires +5VSB to 0.1A, so often due to the "power" of such action caused by the surge, by some anti-interference ability than the poor power supply error as the power-on signal to be triggered. So Intel has largely avoided this problem by stipulating that +5VSB is not less than 0.72A in the ATX12V version 2.01 standard.