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The PC Power Supply Guide for the Masses

  1. Introduction
  2. PSU Abbreviations and Glossary
  3. Connectors used in a PC Power Supply
  4. PSU cables: Non-Modular, Modular and the middle-ground!
  5. Power Supply Labels
  6. Power Supply Form-Factor- ATX12V
  7. Power Supply Form-Factor- SFX12V
  8. Basic requirements of a power supply
  9. Facts about 80 Plus Certification
  10. Protection Circuits and Features
  11. List of Power Supplies, OEM and Review Links
  12. Common PC Power Supply Myths
  13. Resource Links and References
  14. View All

Before we get into the types of power supplies made for the PC, we need to note the basic information that ALL manufacturers need to provide on their label.

They are as follows-

Manufacturers’ Information:

This includes the brand name, the name of the power supply and the actual model, country of manufacturer. UL number and safety certifications are also required to be disclosed on the power supply label. This is also one of the places where manufacturers would place the 80 Plus badge. Along with this, there will be a separate label for the serial number of the actual product.

AC Input:

This gives you the information of AC input operating voltage from you socket you can use your PSU with. These differentiate from country to country. The ones that are usually sold worldwide are 100v- 240v. Power supplies that are sold for specific markets are more reserved. Such is the case with power supplies sold specifically for India and China whose input is 220v to 240v.

DC Output Ratings:

I’ve mentioned the different DC output ratings here. For each DC output, manufacturers mention the load in amps it can provide. Ideally, it’s best if manufacturers provide both. Below or above table, manufacturers need to disclose if they have rated the power supply based on continuous or peak.

Along with these labelling, PSU manufacturers are required to put a warning that one should not open up the power supply unless its don by the official service agency for repairs. These are usually posted in few languages, english being the first- along with universal warning signs and/or title.

A lot of manufacturers, including the reputed ones, have a habit of releasing supplies with exaggerated, under-rated and even fake DC outputs. Some, you can only identify when reviewers test it provided its done in proper conditions and with the right testing equipments. Some can be identified by using simple formulas to see if it adds up as actual wattage provided via the voltage rails. Still, testing it with proper equipments is the only way to verify such claims and very few power supply reviewers have such expensive equipment.


  1. Koolest ripper guide to What is and what is not on SMPS!
    Thanks for adding those SMPS suggestions! 🙂

  2. Much appreciated!

    I plan on putting more guides per component so that many people from newbies to regular users can understand “what is” and “what is not” for many components to help them make better purchase decisions! This way, we can guide even the newest of end users to understand whenever they read our reviews!

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