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It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter newtekie1 Start date Aug 25, Status Not open for further replies. Joined Nov 22, Messages 28, 4. First an explanation of what exactly the efficiency of a PSU means. So, for simplicy sake, lets say your PC components are drawing w of power.
I've seen people say that you take the Wattage rating of the PSU, and the efficiency is how much power the PSU can really output for your component.
This is wrong. Efficiency has nothing to do with this. Simple answer: Heat. Any electricity not converted from AC to DC is given off as heat. I'm one that lives by the moto "nothing is impossible", so I'm not going to say flat out no. However, I will say that it is highly highly unlikely, and none of use will probably see it in our lifetimes or our childrens lifetimes. If I have a w PSU, does that mean it will always draw w of power?
The amount of power drawn is determined by the components of the computer and how much they require. The amount of power drawn will only be equal to what is needed, and no more. Manufacturer warranties usually reflect this: A Bronze-rated power supply might get a 3- to 5-year warranty, while a Platinum-rated model will be backed for 10 years. These days, the most power supplies from well-known, reliable manufacturers have an 80 Plus or above certification, but it is possible to find other PSUs that fall below that.
Those cheap power supplies that get included as part of a bundle with ultra-cheap cases? Not 80 Plus-rated. The actual percentage of efficiency for the U. The minimum efficiency to meet ATX specifications is percent at percent load—much lower than where the 80 Plus standard begins. Three main considerations help determine what efficiency rating will work best for your PC build:. Most average PC users who live in a temperate climate with low pricing for electricity will do fine with a standard 80 Plus or 80 Plus Bronze power supply.
The 80 Plus program has expanded significantly since the first specification was adopted. Valid levels now include Bronze, Silver, Gold, Platinum, and a currently unused Titanium specification level. The chart below lists the requirements a PSU must meet to be certified. In the pre Plus days, PSU prices normally clustered around a given wattage output. The advent of the various 80 Plus levels has created a second variable that can have a significant impact on unit price.
We created this data from NewEgg results, but only picked units from well-known vendors.
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