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PSU Power Consumption

post #1 of 8
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Does a PSU consume the maximum amount of power all the time or does it depend upon the load on the PSU? For example a 950w PSU should consume 950w at all times or does it vary?
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post #2 of 8
Quote:
Originally Posted by dbmsts View Post
Does a PSU consume the maximum amount of power all the time or does it depend upon the load on the PSU? For example a 950w PSU should consume 950w at all times or does it vary?
It doesn't, it will only consume how much your component's really need at a time...

So it will not run at it's highest output possible continuously if your just browseing the web or something
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post #3 of 8
A PSU will only draw what the components need, so if you components only need 500w the psu will draw about 600w from the wall taking 80% efficiency in to account
post #4 of 8
Quote:
Originally Posted by Bitemarks and bloodstains View Post
A PSU will only draw what the components need, so if you components only need 500w the psu will draw about 600w from the wall taking 80% efficiency in to account
Now not even I knew that PSU's do that, knowing that mine prob's take's 100W more than what it needs for efficency disturbs me.... *check's power bill*
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post #5 of 8
Quote:
Originally Posted by Atomfix View Post
Now not even I knew that PSU's do that, knowing that mine prob's take's 100W more than what it needs for efficency disturbs me.... *check's power bill*
There's nothing you can do about it anyway... your system probably draws no more than 350-400W from the wall at peak consumption.
post #6 of 8
Quote:
Originally Posted by Bitemarks and bloodstains View Post
A PSU will only draw what the components need, so if you components only need 500w the psu will draw about 625w from the wall taking 80% efficiency in to account
Fixed.
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post #7 of 8
A power supply is rated (usually) on the power it can supply the system, not on what it draws from the wall. A 50% efficient 1,000w PSU will still supply the same 1,000w inside your rig as an 80+ unit will, it will just take a lot more power from the wall to do it.
To provide 1kw inside your rig:
80+ Platinum: 1124w
80+ gold: 1150w
80+ silver: 1180w
80+ bronze: 1220w
An 80+ unit will need 1250w
Pre 80+ (75%): 1333w
A 50% PSU will need 2kw

As you can see, they all provide 1,000w to your system, but a more efficient PSU will do the same job with less power from the wall, and be cooler and (usually) quieter into the bargain. For high power rigs, 80+ gold or better is a god-send.
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post #8 of 8
it wont be at max all the time it will just provide what your pc needs
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