psu watts help

[Wicca]

my psu uses 600 watts and has a 86 percent efficienty so how much does my computer use

 

[TVeblen]

Use this: eXtreme Power Supply Calculator and find out!

 

[Wicca]

i did that it is 450 watts but i mean when the psu 600 watts it 86 efficient what does it use on the electricity like the psu is 600 watts model but it uses 86 percent efficient so how much watts does it use on my computer

 

[TVeblen]

In general terms, it means that to produce 450 Watts of DC power to your computer it will use (450w/86%) 523.25 Watts of AC power from your wall socket to do so.

That efficiency rating refers to how efficiently the AC to DC conversion is accomplished. It is not absolute, but a theoretical gauge.

 

[Wicca]

so how much does much does the computer use in watts as the typical modern computer uses 50-250 watts

 

[bobkn]

The power use is determined by the components in the PC, not the PSU. As you haven't shared a list of components with us, no one can estimate that for you.

Power supply calculators exist to allow you to specify a PSU that's adequate to supply the maximum possible load of the components. If the PSU is rated much higher than that, the power consumption should be about the same, excepting differences in efficiency.

Your load at idle may be much less than the maximum, especially if you have a high-powered (300W) graphics card.

There are meters that can be placed between the PC and the mains that will tell you how much power you're using. They are not inexpensive, though: roughly $100US.

 

[Wicca]

i used the caclulator it said 450 watts that require a 450 w psu but i have a 600 psu with 86 percent efficentcy so what will my computer be using nobody is anwering my question i am not on about the psu i know with the 86 percent effiienty it will make my watts less but what will it bring it down to i got my computer in 2007 packard bell

 

[Wicca]

Installed Physical Memory (RAM) 3.00 GB each 266mhz
Processor Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s)
geforce nvidia 8800 gtx 756 mb

 

[TVeblen]

450 watts maximum!

If you filled in the calculator table it gives you the maximum number of watts the components in your computer could draw if they were all running at once and at full power. Below that it gives you a recommended size for the power supply, which is always higher that the maximum watts calculated.

In everyday use the PC will only draw about 150 to 200 watts at idle.

Your 600 watt power supply will only put out what the computer is drawing in - only what is needed at the moment. So if you are at idle the 600 watt power supply will be putting out 150 to 200 watts.

 

[Wicca]

150 watts to 200 watts idle that is wrong sure it says that typical computers use 50-250 max it has 86 percent efficienty does it not only use 14 percent of 600 watts how could it use 150 to 200 watts idle

 

[Britton30]

my psu uses 600 watts and has a 86 percent efficienty so how much does my computer use

Your PSU does NOT use 600W, that is the max rated output at a full load. Amps is energy Usage.
Use a Power calculator based on your system components, we don't know what they are...no system spec filled out.

 

[Wicca]

the computer needs a 450 psu as that is what it need but i have a 600 watt with 86 percent efficeny so would that not lower it to 160 watts on full load also my graphics card is at 5 percent loads when i watch a dvd geforce 8800gtx

 

[Britton30]

The efficiency of a power supply unit is the percentage of total output DC power in relation to total input AC power. The portion lost during conversion is mostly in the form of heat.

This index directly relates to your power bills. For example, if your computer system consumes 300W of power, using a PSU with 85% efficiency will require about 353W input power, and a 70% PSU will pull 428W power from the wall. It is not hard to know how much more money you are going to pay using a low efficiency power supply, and this number will typically grow as time goes by.

A power supply with a higher efficiency rating will not only help save costs - the heat dissipated will be much lower as well, resulting in better reliability and durability, and can also help reduce noise as its cooling fan can operate at lower speeds and still provide adequate cooling.

More at Newegg

I think your initial question was answered, but you has a 800W PSU there. http://www.sevenforums.com/general-discussion/175141-computer-power-usage.html

 

[Wicca]

how can a computer use 400 watts the is alot of electrity i am annoyed at this i thought it uses more then a 42 inch tv 193 watts

 

[Wicca]

filled in my system spec

 

[ignatzatsonic]

The only way to know how much power you actually use is to measure it with a separate device, such as a Killawatt. At idle, you may use less than 150 watts. I'm just guessing based on your components list. If you don't use a separate device, all you can do is guess and most people guess way too high.

 

[TVeblen]

Oh boy! We got a live one here!

 

[Britton30]

The Killawatt device was suggested in his other thread I linked too. See ya.
One answered question only brings on another one.

 

[bobkn]

filled in my system spec

The Q6600 is good for about 38W at standby, 100W peak.

The 8800GTX is supposed to max out at 140-170W. (Varies by manucaturer.)

Assuming an 86% efficiency, 270W would require 314W from the mains. It'd be much less at idle.