What are power supply unit and its function?
An easy terms power supply means the component of PC that collects a specific amount power from 110/220v. AC voltage line and convert dc voltage and supply different components according to demand. Most of the people of our country consider it as a less important but in other words it is very important for the PC and it can be called as a heart of PC. During purchasing computer most of the people use cheap power supply which price is 8-12$. My opinion is that giving valuable price should use decent power supply.
Power supply unit rails
Prior to we said that power supply means the component of PC that collects a specific amount power from 110/220v. AC voltage line and convert dc voltage and supply different components according to demand. But in all component of PC same voltage is not operated. The components of PC generally operate +3.3v, +5v, +12v, -12v, +5vsb (standby). PSU AC line converts 110v/220v voltage, in those voltage and supply power.
Most of the time negative rail remains in power supply such as -12v, -5v rail. -5v rail is not generally found in present power supply unit. In old from floppy controller has used -5v rail. Some LAN adapter use -12v rail, that’s why less power has been used.
On the basis of rail two types of power supply:
• Multi rail PSU
in our main component of PC more than one +12v rail is present such as processor, CPU cooling fan or water cooling system collect power from +12v rail.
• Single rail PSU
At present this power supply unit is very helpful and this type of power supply unit remains only +12v rail and a specific AMPIRE remains for those +12v rail. The pc component that operates +12v rail, collects power according to need from +12v rail.