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Thread: Need to learn about power consumption

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    Default Need to learn about power consumption

    what is the difference between 80+ gold , silver,bronze psu?
    what does the efficiency means in power supply?
    Does a 80+ gold psu consume low power?
    Will it reduce my electricity bill (such as : gold electricity bill<silver electricity bill<bronze electricity bill< normal 80+ electricity bill)
    And how much power does a psu consume in idle mode?
    Is there anyway i can know how much power my computer is consuming without using a watt-meter or any other electronic device??power

  2. #2
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    As for electric billing: gold > silver > bronze
    but not that noticeable for even caring.

    efficiency: 85% efficient(80+ bronze/silver) means 15% beshi current lage rated wattage pete. bakita haraya jai as heat or something.

    watt-meter er bodole kisu benchmark soft use kora jay. but i think tara shudhu output dekhay.

  3. #3
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    Quote Originally Posted by Sybaris Ceaser View Post
    As for electric billing: gold > silver > bronze
    but not that noticeable for even caring.

    efficiency: 85% efficient(80+ bronze/silver) means 15% beshi current lage rated wattage pete. bakita haraya jai as heat or something.

    watt-meter er bodole kisu benchmark soft use kora jay. but i think tara shudhu output dekhay.
    that means ami 750 watt bronze psu kinle electricity bill aro kom asto ??
    taile ami gold use korbo ken ?
    ar arekta question idle situation e ekta psu koto power consume kore ?
    software khujchi but pai nai

    - - - Updated - - -

    i think this explains best
    It really depends on what units you are looking at how long it will take to pay off, some units also barely miss the next level up so they may be a better value. Overall, each higher level is about 2 percentage points more efficient than the one below it at 20/50/100.


    Here is some quick math for you, lets suppose you have a 500 W power supply, a system that pulls 250 W at full load, and is on 8 hour a day running at full load all the time(unrealistic but makes for much easier math), that puts your PSU at 50% load so its going to be at peak efficiency.


    Power drawn from the wall:
    Basic - 312.5 W
    Bronze - 304.9 W
    Silver - 294.1 W
    Gold - 277.8 W
    Platinum - 271.7 W

    That means that over basic you save 7.6 W/h with bronze, 18.4 W/h with silver, 34.7 W/h with gold, and 40.8 W/h with platinum. With 8 hours a day at full load that comes out to be 1.82 kWh, 4.42 kWh, 8.33 kWh, and 9.79 kWh saved per month with bronze, silver, gold, and platinum respectively. If you pay 15 cents per kWh that means that over the course of 1 year having a platinum rated PSU over basic saves you about $17.62 so it could take quite a while to pay for the difference with energy savings alone, but in general silver rated units and up are much better quality than basic rated units.

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    little off topic: too many bangladeshis think efficiency has something to do with power output... they think 80% efficient 650w power supply can give 650x80%= 520w dc power output at max

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    Quote Originally Posted by Taher furious View Post
    little off topic: too many bangladeshis think efficiency has something to do with power output... they think 80% efficient 650w power supply can give 650x80%= 520w dc power output at max
    hmm..The correct calculation is a 80% effi PSU will draw 812.5watt from the wall to deliver 650watt.

    - - - Updated - - -

    @yahyasharif u should stop worrying about psu effi and electric bill since the savings is very minor compared to the additional cost of getting a higher effi PSU.

    But one advantage of highly efficient psu would be it will be less hard on the ups when used for long duration.(assuming it's internals are smart enough to keep the inrush current draw as low as possible and comes with decently sized primary caps)

    But PSU effi also suffers when its fed with simulated sine wave.

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    Quote Originally Posted by Taher furious View Post
    little off topic: too many bangladeshis think efficiency has something to do with power output... they think 80% efficient 650w power supply can give 650x80%= 520w dc power output at max
    Yup. I had to explain that to a LOT of people -_-

  7. #7
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    Quote Originally Posted by GalibTheGamer View Post
    Yup. I had to explain that to a LOT of people -_-
    i know the feel bro

    - - - Updated - - -

    to op: unless you are a electricity bill nazi you should stop caring about the difference between bronze and gold and care more about ampere in +12v

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    This review of the Corsair HX1000i might help you understand a little about power consumption.
    Its uses a power supply load tester thingy and shows the efficiency at various watts.

  9. #9
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    Quote Originally Posted by Taher furious View Post
    little off topic: too many bangladeshis think efficiency has something to do with power output... they think 80% efficient 650w power supply can give 650x80%= 520w dc power output at max
    I don't think anybody thinks like that

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    Quote Originally Posted by yahyasharif View Post
    I don't think anybody thinks like that
    dude trust me i get that a lot.

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    Quote Originally Posted by yahyasharif View Post
    That means that over basic you save 7.6 W/h with bronze, 18.4 W/h with silver, 34.7 W/h with gold, and 40.8 W/h with platinum. With 8 hours a day at full load that comes out to be 1.82 kWh, 4.42 kWh, 8.33 kWh, and 9.79 kWh saved per month with bronze, silver, gold, and platinum respectively. If you pay 15 cents per kWh that means that over the course of 1 year having a platinum rated PSU over basic saves you about $17.62 so it could take quite a while to pay for the difference with energy savings alone, but in general silver rated units and up are much better quality than basic rated units.
    So buy using a Gold PSU over a basic one would save me about 10 units a month, 120 units a year. I pay about TK8 per unit. So I will save around 1K in a year.

    I am wondering is it worth paying the premium?

  12. #12
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    @Mithun 14ka4, not much. but efficiency begets longetivity. because unused energy translates into heat. and heat results to ..... saw some seasonic unit, x460 maybe. efficient enough to not needing a fan. perfect for HTPC, which to this topic is completely out of context -_-"

  13. #13
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    main reason behind posting this, i faced power failure and lack of electricity (due to prepaid balance) while using cooler master v750 (80+ gold)

    - - - Updated - - -

    Quote Originally Posted by mithun12ka4 View Post
    So buy using a Gold PSU over a basic one would save me about 10 units a month, 120 units a year. I pay about TK8 per unit. So I will save around 1K in a year.

    I am wondering is it worth paying the premium?
    yeah it saves a lot of unit

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