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Overclock.net - Overclocking.net > Components > Power Supplies | |
Do PSU's use all thier rated wattage all the time?
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03-22-07
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#1 (permalink) | |||
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*cough* Stock *cough*
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Do PSU's use all thier rated wattage all the time?
This might sound like a silly question but i was curious.
For example: I bought a Silverstone 360watt PSU for my sisters PC, and I was thinking if the PSU uses all that power all the time (constant)? If it doesn't what happens to the power (does it just not get pulled from the outlet?) Thanks alot guys. It was a burning question in the back of my mind. P.S. I looked for a guide/FAQ, but i coudln't find any. Laurence.
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03-22-07
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New to Overclock.net
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from what i understand, yes. it does.
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03-22-07
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Audiophile
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No they dont, if they were 100% efficient then they would but they're not
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03-22-07
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PC Gamer
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i doesnt think do unless u have alot of stuff that pulls alot of power.
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03-22-07
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PC Gamer
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They don't usually. Load for a PC for non-gaming is something like 200 watts (mobo, RAM, CPU, hard drive/optical drive...)
But a graphics card in itself can use that much. So you need something that has spare wattage. Extra > Not enough 
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03-22-07
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PC Gamer
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All psu's are transformers.When you use a transformer it creates heat and that causes a thermal energy loss so you lose (use) a bit of power through the transforming from 240v to 12v and below.Unused power is usually shed through heat sinks.
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03-22-07
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#7 (permalink) | |||
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*cough* Stock *cough*
Join Date: Mar 2005
Location: Buderim, QLD, Australia
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So basically it's like having a 360watt (in my situation) light bulb on all the time?
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Going C2D... E6300, Gigabyte 965P-S3, 7900GS, G.Skill 667 2gb, etc.
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03-22-07
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Happy New Year!
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I think what you are trying to say is:
__________________If I had a 600watt PSU, and only has 200watts being used for the PC, what happens to the spare 400W available for transfer by the PSU? Is the PSU still drawing it from the whole in the wall? I really dont know, but some of the answers here confuse the question  This doesn't look like a question about efficiency, more PSU capacity...
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03-22-07
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ATI Enthusiast
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I really do not think that it it is always drawing the max rated output from the wall. It takes what it needs
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03-22-07
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PC Gamer
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You can get a voltmeter or whatever to check it out. You plug it into the wall, then plug everything into the voltmeter to see the wattage you're drawing out (or volts and then multiply by the amperes of your outlet)
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