Understanding the Relevance of Power Supply Units

Power supply unit is a device that provides essential power supply to different components of a computer system. Power supply units assume greater significance in the role of AC to DC converter. It consists of a series of internal components which are housed inside a metallic rectangular case.

Some of the key components of a power supply unit are:
1.Receptacle for power plug-in
2.Small fan to prevent over-heating
3.Switch to operate at different input voltages.
4.Connectors

Why Power Supply Units are Important
Every electronic component has a specific power requirement, both at a base level and at maximum range. Further, computer-based components work on DC voltage. Thus, power supply units receive AC voltage from home supplies at 100V to 120V or 200V to 220V and convert it to the required DC voltage.

Power supply units transfer the DC voltage to different components through specially-designed cables called as rails.

A power supply unit generates three different DC voltages:
1.12 volts: GPU (Graphics Processing Unit) and CPU are the biggest power consumers in a computer system. They require base current of 12 volts. Thus, power supply units generate a large quantity of 12 volts current which is transferred through 12V rails.
2.5 volts: Hardware components such as USB ports, hard drives and CD or DVD drives requires 5 volts DC.
3.3.3 volts: Smaller components such as logic chips utilize phantom current of 3.3V.

Power Supply Units: ATX12V Compliant
ATX was launched by Microsoft in 1995, which overtook AT compliant as a form factor to provide universal design specification for motherboard and power supply units. Later, ATX12V compliant was launched to refurbish power supply units in relation to dynamic power requirements. ATX12V compliant considers extensive power usage owing to heavy processors, PCI Express bus and graphic card interface.

Power Supply Units: Essential Considerations for Buying
Before buying power supply units, consider the following:
1.Know your power supply requirements: It depends on the installed components on the system.
2.Make sure to buy low or no noise power supply units
3.Consider the mean time between failures (MTBF) - It is the rating provided by the manufacturer. This indicates the product's durability.
4.Look for efficient power supply to fix power bills.

CyPower is a well established online resource to help you search for information, review your power requirements and find the top manufacturers. For detailed information on power supply units, visit www.cypower.com.