Here's a standard for ATX Power supply connectors dan ATX power supply pinouts. Standard power supplies turn the incoming 110V or 220V AC (Alternating Current) into various DC (Direct Current) voltages suitable for powering the computer's components.
Power supplies are quoted as having a certain power output specified in Watts, a standard power supply would typically be able to deliver around 350 Watts.
The more components (hard drives, CD/DVD drives, tape drives, ventilation fans, etc) you have in your PC the greater the power required from the power supply.
By using a PSU that delivers more power than required means it won't be running at full capacity, which can prolong life by reducing heat damage to the PSU's internal components during long periods of use.
Always replace a power supply with an equivalent or superior power output (Wattage).
There are 3 types of power supply in common use:
AT Power Supply - still in use in older PCs.
ATX Power Supply - commonly in use today.
ATX-2 Power Supply - recently new standard.
The voltages produced by AT/ATX/ATX-2 power supplies are:
+3.3Volts DC (ATX/ATX-2)
+5Volts DC (AT/ATX/ATX-2)
-5Volts DC (AT/ATX/ATX-2)
+5Volts DC Standby (ATX/ATX-2)
+12Volts DC (AT/ATX/ATX-2)
-12Volts DC (AT/ATX/ATX-2)
A power supply can be easily changed and are generally not expensive, so if one fails (which is far from uncommon) then replacement is usually the most economic solution.
ATX Power Supply Connectors Diagram
ATX Power Supply Pinouts Diagram
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