# Energy calculator for computers.

#### binoyxj

##### PrOuD InDiAn
There are online energy calculators available on the internet such as the Extreme power supply calculator. All you have to do is punch in the detailed configuration of your PC or laptop and click the calculate button. The aggregate of power consumed by all the components is displayed.

#### LordOfLA

##### Godlike!
Tells me my PC uses 621W Seems I may need to upgrade my PSU soon. Thats a bit close to its 650W maximum output.

##### Beware the G-Man
Political Access
Mine's at 410W

So I'm good with my 600W PSU.

#### roirraW "edor" ehT

##### Builder/Installer
I use my Uninteruptible Power Supplies to inform me how much power my computers draw.

#### ray_gillespie

Political Access
Well mine comes out at about 300W - well below my maximum. These calculators always come out way below what I expect (esp. this time with the 9800GTX!), I wonder if I'm forgetting about something!

It still annoys me that they refer to current as 'amperage' though

##### Beware the G-Man
Political Access
current (kûr'?nt)

1. A flowing movement in a liquid, gas, plasma, or other form of matter, especially one that follows a recognizable course.
2. A flow of positive electric charge. The strength of current flow in any medium is related to voltage differences in that medium, as well as the electrical properties of the medium, and is measured in amperes. Since electrons are stipulated to have a negative charge, current in an electrical circuit actually flows in the opposite direction of the movement of electrons. See also electromagnetism, Ohm's law. See Note at electric charge.

Our Living Language : Electric current is the phenomenon most often experienced in the form of electricity. Any time an object with a net electric charge is in motion, such as an electron in a wire or a positively charged ion jetting into the atmosphere from a solar flare, there is an electric current; the total current moving through some cross-sectional area in a given direction is simply the amount of positive charge moving through that cross-section. Current is sometimes confused with electric potential or voltage, but a voltage difference between two points (such as the two terminals of a battery) means only that current can potentially flow between them; how much does in fact flow depends on the resistance of the material between the two points. Electrical signals transmitted through a wire generally propagate at nearly the speed of light, but the current in the wire actually moves very slowly: pushing electrons into one end of the wire is rather like pushing a marble into one end of a tube filled with marbles—a marble (or electron) gets pushed out the other end almost instantly, even though the marbles (or electrons) inside move only incrementally.
Source:
The American Heritage® Science Dictionary

Main Entry: Ohm's law
Pronunciation: 'Omz-
Function: noun
: a law in electricity: the strength or intensity of an unvarying electrical current is directly proportional to the electromotive force and inversely proportional to the resistance of the circuit

E=I/R

E = Voltage Volts
I = Amperage (amps)
R = Resistance (Ohms)

Amperage is current

http://www.wisegeek.com/what-is-amperage.htm

Electric current is the flow (movement) of electric charge. The SI unit of electric current is the ampere, and electric current is measured using an ammeter. For the definition of the ampere, see the Ampere article.

Source:
http://en.wikipedia.org/wiki/Electric_current

The ampere, in practice often shortened to amp, (symbol: A) is a unit of electric current, or amount of electric charge per second. The ampere is an SI base unit, and is named after André-Marie Ampère, one of the main discoverers of electromagnetism.

Source:
http://en.wikipedia.org/wiki/Ampere

The Ampere is a unit of current. The term amperage is looking for current expressed in amperes.
Current can also be expressed in coulombs per second, which is what Amperes are.
Volts are expressed in Joules per coulomb.

#### roirraW "edor" ehT

##### Beware the G-Man
Political Access
Heh heh heh, yeah, and they get to be the size of baseballs, and just as hard.

#### epk

Political Access

im taking physics II in school right now which is all that (plus magnetism), u can imagine how much mine hurts

#### epk

Political Access
those magnets seem cool, man! thanks for the info

too bad we only get to play with electromagnets hehe

#### AlexK

##### Ooops i did it again!
Lol i got 249 watts needed.. I have a 400 w powersupply and it says theres no power for additional devices in the free USB-drives.. Hmm?...

#### roirraW "edor" ehT

##### Builder/Installer
The power supplied to the USB drives isn't necessarily dependent on the power supply. The USB specifications, plus the motherboard really determine that. After all, those thin circuit board traces can only take so much amperage before they burn up, so the USB specifications are there to limit the maximum each USB port is supposed to supply, and it's up to the chipset/motherboard manufacturer to implement it to specifications.

Which is why some high-power USB devices will have a dual USB dongle so you can draw power from two USB ports instead of just one.

347 Watts

/pats computer

#### roirraW "edor" ehT

##### Builder/Installer
124 watts is what my old system (not what I have in my sig) is drawing through my UPS.

Political Access
409 Watts

### Latest profile posts

Impressed you have kept this alive this long EP! So many sites have come and gone.

Just did some crude math and I apparently joined almost 18yrs ago, how is that possible???
hello peeps... is been some time since i last came here.
Rest in peace my friend, been trying to find you and finally did in the worst way imaginable.
Yo fellas!
Where are you buddy?