What is 80 PLUS, what is efficiency and why is it important?

(Last edited 5/14/2026)

80 PLUS is a power supply efficiency certification program. A PSU that is “80 PLUS certified” must meet defined minimum efficiency levels when converting AC input to DC output under standardized test conditions.

A PSU converts AC from the wall into DC for the PC system. That conversion is imperfect. Efficiency is measured by taking the output power demanded by a load and dividing by the input power from the wall. For example, if the load is 300W, therefore the DC output is 300W, and the power coming from the wall is 375W, one would divide 300W by 375W and come up with 80% efficiency. The 75W that is lost is lost as heat. What the 80 PLUS program standardizes how this efficiency is measured and reported.

In the early 2000s, PC power supplies were found to be only 60–70% efficient, meaning a significant portion of the energy they drew was lost as heat rather than used to power the system. As PCs and servers proliferated globally, this inefficiency began to have a measurable impact on electricity consumption.

In 2004, EPRI (Electric Power Research Institute) and Ecos Consulting developed a test protocol addressing this problem, presenting the 80 PLUS initiative at the ACEEE (American Council for an Energy Efficient Economy) market transformation symposium. This standard required PSUs to achieve at least 80% efficiency at key load points.

The certification has expanded several times since its introduction: in 2008, Bronze, Silver, and Gold tiers were added; Platinum followed in 2009; Titanium in 2012; and in 2024, 80 PLUS Ruby was introduced for high- line redundant power supplies.

The tables below outline the current 80 PLUS certification requirements for desktop, workstation, and non-redundant server PSUs:

115V Internal Non-Redundant
% of Rated Load
Certification
10%
20%
50%
100%
80 PLUS Standard
80%
80%
80%
 PFC ≥0.90
80 PLUS Bronze
82%
85%
PFC ≥0.95
82%
  
80 PLUS Silver
85%
88%
PFC ≥0.95
85%
  
80 PLUS Gold
87%
90%
PFC ≥0.95
87%
  
80 PLUS Platinum
90%
92%
PFC ≥0.95
89%
  
80 PLUS Titanium
90%
92%
PFC ≥0.95
94%
90%
  

 

230V EU Internal Non-Redundant
% of Rated Load
Certification
10%
20%
50%
100%
80 PLUS Standard
82%
85%
PFC ≥0.90
82%
80 PLUS Bronze
85%
88%
PFC ≥0.90
85%
80 PLUS Silver
87%
90%
PFC ≥0.90
87%
80 PLUS Gold
90%
92%
PFC ≥0.90
89%
80 PLUS Platinum
92%
94%
PFC ≥0.90
90%
80 PLUS Titanium
90%
93%
PFC ≥0.95
95%
91%

 

230V, 277V Internal Redundant
% of Rated Load
Certification
5%
10%
20%
50%
100%
80 PLUS Standard    
80%
82%
85%
PFC ≥0.90
82%
  
80 PLUS Bronze    
82%
85%
89%
PFC ≥0.90
85%
  
80 PLUS Silver    
85%
88%
92%
PFC ≥0.90
88%
  
80 PLUS Gold    
88%
90%
94%
PFC ≥0.95
91%
  
80 PLUS Platinum    
90%
94%
PFC ≥0.95
96%
91%
  
80 PLUS Titanium
90%
 PFC ≥0.90
91%
PFC ≥0.90
95%
PFC ≥0.96
96.5%
PFC ≥0.96
92%
 PFC ≥0.96
230V, 10% efficiency criteria for Titanium are a suggestion.

 

380V DC, 800V DC and 480V Internal Redundant
% of Rated Load
Certification
10%
20%
50%
100%
80 PLUS Platinum
88%
90%
94%
PFC ≥0.95
91%
  
80 PLUS Titanium
90%
94%
PFC ≥0.95
96%
91%
  
80 PLUS Ruby
91%
PFC ≥0.90
95%
PFC ≥0.96
97%
PFC ≥0.96
92%
 PFC ≥0.96
PFC requirement only applies to 480V AC

 

115V Industrial
% of Rated Load
Certification
10%
20%
50%
100%
80 PLUS Silver
80%
85%
PFC ≥0.90
88%
85%
80 PLUS Gold
82%
87%
PFC ≥0.90
90%
87%
80 PLUS Platinum
85%
90%
PFC ≥0.95
92%
90%

It's worth noting that 80 PLUS certification only measures efficiency and power factor. It says nothing about voltage regulation quality, transient response, EMI performance, reliability, or component quality. Assuming that a Gold-rated unit is automatically a good unit is a mistake. This is especially true today, as Chinese component suppliers, particularly MOSFETs, have become capable of producing parts that hit Gold or even Platinum efficiency numbers at prices that once only got you Bronze. The catch is that the real-world performance and lifespan of these parts have left a lot to be desired.