Rating On A Power Supply

Power Supplies” have different types of ratings. Here, the 80+ certification comes into consideration which ranges from the lowest, i.e., bronze, and climbs up to the titanium rating. The 80+ certification ensures that under 20%, 50%, and 100% load, the power supply will transform at least 80% of the “Alternating Current(AC)” to “Direct Current(DC)” as the normal power supply never converts the entire 100% current.

This write-up will discuss:

What is Power Supply?

A power supply is a component/module that provides power to the electric load(s). It transforms one type of electrical power into another. It can transform solar or mechanical energy into electrical form of energy. The power supply works in such a way that when the system is powered on and utilizing electricity, the “Power Supply Unit(PSU)) transforms the DC power to AC.

What Does Power Supply Rating Imply?

The power supply rating corresponds to the energy efficiency of the “PSU”. The power supply certified by the “80 Plus” standard will provide at least 80% power efficiency at 20, 50, and 100% load. This particular standard is used to evaluate the system’s power supply based on reliability.

What Factors to Consider While Opting for Power Supply Rating?

The following variables can be considered to analyze what power supply rating will work best for your system:

  • Electricity rates
  • Temperature
  • Budget

Types/Forms of Power Supply Ratings

Let’s overview the below-listed power supply ratings one by one:

80 Plus Silver

Silver-rated” power supplies are not that common. The “Power Supply Units” having the Silver rating are rated for 85% efficiency at 20% load and 88% efficiency at 50% load.

80 Plus Gold

The majority of the mid-range to high-range systems utilize an “80 Plus Gold” rated power supply due to the phenomenal reliability and reasonable cost. These power supplies are rated for 87% efficiency at 20% as well as 100% load, identical to Silver, and 90% efficiency at 50% load.

80 Plus Bronze

Bronze-rated” power supplies are reliable and more reasonable compared to Gold-rated power supplies in terms of cost. These particular power supplies are rated for at least 82% efficiency at 20% load, 85% efficiency at 50% load, and 82% efficiency at 100% load.

80 Plus Platinum

These power supply ratings being efficient are often reserved for the server space. These are rated for 92% at 50% load, and 89% at 100% load.

80 Plus Titanium

Titanium-rated” PSUs are reliable, with a warranty of almost a decade. These power supplies are rated for 90% efficiency at as low as 10% load, 92% efficiency at 20% load, and 90% efficiency at 100% load.

How to Nominate an Optimal Rating for a Power Supply?

The “Power Supply Unit” concerns can be addressed by utilizing the power supply rated as 80 Plus Gold. However, if you are looking for a PSU with features such as enhanced quality connectors and long warranties, opt for an 80 Plus Platinum-rated PSU. To make it clear, the higher the efficiency is, the less heat it generates and the lower noise it produces, but with an elevated price. Likewise, the lower the efficiency of a PSU, the higher the power consumption, thereby affecting electricity bills badly.


To sum up, the higher the wattage, so is the efficiency rating. Your decisions can fall between two to three options and vary from person to person depending upon the discussed factors. This will narrow down the selection process and in the case of a PSU, always buy it from a trusted manufacturer. This post was all about rating a power supply.

About the author

Umar Hassan

I am a Front-End Web Developer. Being a technical author, I try to learn new things and adapt with them every day. I am passionate to write about evolving software tools and technologies and make it understandable for the end-user.