80 Plus

PSU 80 Plus (trademarked 80 PLUS) is a voluntary certification program launched in 2004, intended to promote efficient energy use in computer power supply units (PSUs). Certification is acquirable for products that have more than 80% energy efficiency at 20%, 50% and 100% of rated load, and a power factor of 0.9 or greater at 100% load.

PSU]] 80 Plus (trademarked 80 PLUS) is a voluntary certification program launched in 2004, intended to promote efficient energy use in computer power supply units (PSUs). Certification is acquirable for products that have more than 80% energy efficiency at 20%, 50% and 100% of rated load, and a power factor of 0.9 or greater at 100% load. ==History== EPRI (Electric Power Research Institute) and Ecos Consulting (promoter of the brand) develop the Generalized Internal Power Supply Efficiency Test Protocol for desktop derived multi-output power supplies. March 2004: the 80 Plus idea was presented as an initiative at the ACEEE Market Transformation Symposium. February 2005: the first market-ready power supply was created by Seasonic. 2006: Energy Star added 80 Plus requirements to their then-upcoming (in effect since July 2007) Energy Star 4.0 computer specifications. November and February 2006: HP and Dell certify their PSUs to the 80 Plus specification. 20 July 2007: Energy Star Computer Specification 4.0 goes into effect. The specification includes 80 Plus power supply efficiency levels for desktop computers. December 2007: over 200 PSUs on the market are 80 Plus certified and it is becoming the market standard. First-quarter 2008: standards revised to add Bronze, Silver, and Gold higher efficiency level certifications. October 2009: added specification for the Platinum efficiency level. February 2012: Dell and Delta Electronics working together were able to achieve world-first 80 Plus Titanium server power supply. April 2024, CLEAResult introduced the 80 PLUS Ruby certification, a new standard specifically designed for data center power supplies to address the power demands of AI and high-performance computing.The Ruby level requires a 96% efficiency at 50% load and 94% at 100%load. == Efficiency level certifications== , the following categories are available for classification: 115V Industrial: certified for industrial applications 115V and 230V EU Internal Non-Redundant: certified for desktop, workstation and non-redundant server applications 230V, 277V, 480V, 380V DC Internal and 800V DC Internal: certified for redundant data center applications For the higher certification levels, the requirement of 0.9 or better power factor was extended to apply to 20% and 50% load levels, as well as at 100% load. The Platinum level requires 0.95 or better power factor for servers. Redundancy is typically used in data centers. Data Source: ==Certification== Plug Load Solutions tests PSUs according to their testing protocol and lists certified PSUs with downloadable certificates in PDF format, allowing consumers to verify how many and which models are listed by each company. ==Technical overview== The efficiency of a computer power supply is its output power divided by its input power; the remaining input power is converted to heat as expected under conservation of energy. For instance, a 600 W power supply with 60% efficiency running at full load would draw 1000 W from the mains and waste 400 W as heat. A 600 W power supply with 80% efficiency running at full load would draw 750 W from the mains and waste only 150 W as heat. For a given power supply, efficiency varies depending on how much power is being delivered. Supplies are typically most efficient at between half and three-quarters load, much less efficient at low load, and somewhat less efficient at maximum load. Older ATX power supplies were typically 60% to 75% efficient. To qualify for 80 Plus, a power supply must achieve at least 80% efficiency at three specified loads (20%, 50% and 100% of maximum rated power). However, 80 Plus supplies may still be less than 80% efficient at lower loads. For instance, an 80 Plus, 520 watt supply could still be 70% or less efficient at 60 watts (a typical idle power for a desktop computer). Thus it is still important to select a supply with capacity appropriate to the device being powered. It is easier to achieve the higher efficiency levels for higher wattage supplies, so gold and platinum supplies may be less available in consumer-level supplies of reasonable capacity for typical desktop machines. Typical computer power supplies may have power factors as low as 0.5 to 0.6. The higher power factor reduces the peak current draw, reducing load on the circuit or on an uninterruptible power supply. Reducing the heat output of the computer helps reduce noise, since fans do not have to spin as fast to cool the computer. Reduced heat and resulting in lower cooling demands may increase computer reliability. ==See also== AC adapter Green computing IT energy management Power management Performance per watt Quiet PC ==References== ==External links== .

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