Tag Archives: ATX

What Is Switch Mode Power Supply

Switch Mode Power Supply

Switch Mode Power Supply

Every electrical or electronic device needs power for work and the computer is not exception to it. Computers, too, have a particularly designed power supply component known as Switch Mode Power Supply (SMPS). SMPS converts raw input power to controlled voltage and current for the operation of various components of the computer. SMPS uses switches for high efficiency. The primary function of SMPS is to convert the alternating current (AC) power available in homes into direct current (DC) required for a computer system. In desktop computers, a metal box found in the corner of the CPU case supplies
power to various components in the CPU box. The power supply converts 115-230 volt AC into DC that is required for computer components to work.

The terms such as voltage, AC, DC, etc., are closely associated with the power supply or SMPS. Voltage is an electric potential difference between two points and is measured in volts. AC stands for alternating current. It is an electric
current whose magnitude and direction vary cyclically. DC stands for direct current. It is considered as the constant flow of electrons in a single direction from low to high potential. Computers use DC power. Because of the advantage of alternating current over direct current in transforming and transmission, electric power distribution today is nearly everywhere alternating current.

The SMPS or power supply of a computer comes in different form factor styles. The form factor refers to the physical dimensions of a component. The form factor of the power supply must match with the form factor of the computer case into which the SMPS is inserted. There are various industry standard form factors available. Some of the commonly used form factors with their characteristics are given below:
1. LPX
2. ATX
3. SFX

The LPX form factor style power supply has exactly the same motherboard and disk drive connectors as the previous standard power supply form factors. LPX form factor power supply differs in its reduced size that allows building much smaller and consumer oriented PCs. Due to their small size, they can be put into almost every type of computer cases.

The ATX form factor is developed by Intel in 1995. ATX is similar to LPX in physical dimensions. The difference between the two is that the power pass through-outlet for the monitor has been removed from ATX. Another difference is that in ATX, the cooling fan is mounted along the inner side of the power supply. With this kind of arrangement, the fan draws air in from the
back of the chassis and blows it inside across the motherboard.

The SFX form factor style power supply is 100 mm wide, 125 mm deep, and 63.5 mm in height. It includes a 60 mm power supply fan for cooling. The main SFX motherboard connector is in the same shape and size as the ATX connector. The one difference here is that the SFX power supply specification does not support the -5V compatibility voltage and, therefore, should not be used with motherboards that have ISA slots.

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Why Does My Pc Always Crash

When we use the computer in daily life, we always meet such problems as PC dead and crashing. As for the new computer, this problem is caused by the no response program. As long as we forcibly shut down the no response program, the computer will work normally again. The solution to forcibly shutdown is to use Ctrl+Alt+Del at the same time, then there will appear the Shutdown dialog. You can use the mouse to choose the program and click End Program button, it is ok. If the PC is dead too much, you can not even display the Shutdown dialog or the PC is blue screen, you can only use the compose key or the reset key to restart the computer. Then how will you deal with the following situation?

1. Power Failure
When the power is cut, you are advised to turn off all the electricalsource in case that the screen and ATX will start at the same time when the power is on, which will do damage to the computer hardware.

2. The electrical outlet is too old.

Because the high-velocity hard disk will cost much electricity, the old electrical outlet can not stand the high voltage and high current, in this case there will lead to the PC dead or restart. Therefore you are advised to change a heavy power electrical outlet which will offer the safest guarantee for your PC.

3. Auto Power-Off

If the temperature of the CPU is so high that it exceeds the temperature limit of BIOS, the BIOS will shut down the computer automatically to protect itself.

4. System Failure

System failure is usually caused by the damaged files or unsuccessfully loading the command.

5. System Crash

The PC screen is locked even the ALT + CTRL + DEL can not start the PC again. This problem is caused by the system bug or too small compatibility among the software. If you run several programs at the same time, it will often cause the system failure.

6. Blank screen at Startup.

When you are ready to start the computer, the electrical outlet should power on first, then the BIOS will have a self-test and examine the CPU, memory, video card, hardware and hard disk. All this process, no matter which step has problem, the computer will can not start again.

7. Crack and Peculiar Smell

If the strings on the hardware or the disk have not been fastened, it will lead to the noise of crack. The peculiar smell usually comes from the host computer, you should save this problem for the professionals to deal with.

8. Memory Error

Except the bad memory bank and slot, the memory itself should take the big responsibility. If you set the CL value too small, it can often cause the PC restart.

9. The Display Card Error

This reason for the display card error is due to incompatibility between BISO and the display card.

There are many reasons for computer errors, those above are only the part. It is really headache for blue screen and frequent restart. Here I offer some preventive measures for those errors.

1. You had better not to overlock the CPU.
2. Be careful when you pull or insert the hardware in case of poor contact.
3. Set well the BIOS.
4. Do not use or open the unidentified software and email.
5. Do not power off before the software has not normally shutted down.
6. Please pay attention to the order when you load the software so as not to disorder the system management.
7. Do not use the small memory application to run the big-memory program.
8. You should always clean the dust on the host computer or it will affect the heating.
9. Do not share the slot with air conditioner and refrigerator.
10. Do not use the faked software.

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