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What happens when you use a high-wattage PSU with a low-power system?

post #1 of 5
Thread Starter 
Will it just have the higher amount of watts coursing throughout but only consuming as much as the components inside or what? Could a high-wattage PSU consume more power than a low-wattage PSU with the same components?
post #2 of 5
I believe that most of the time it can be more efficient then using a lower wattage PS (Less of a load on PS = more efficient powering of components)
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post #3 of 5
You can sometimes have poor efficiency.

Though it's not like a PSU's performance gets worse at lower loads.

Below 20% usage though, some PSU's can have drastic drops in efficiency since 80+ only tests at 20%, 50%, & 100% usage. So they don't have to have 80% (or higher) efficiency at say, 15% load.
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post #4 of 5
Quote:
Originally Posted by TrueOptic;12050288 
Will it just have the higher amount of watts coursing throughout but only consuming as much as the components inside or what?
The power supply will only provide as much as your system demands so if your system uses 500 watts the power supply will provide 500 watts dc power regardless if its rated at 500 watts or 1000 watts or higher
Quote:
Originally Posted by TrueOptic;12050288 
Could a high-wattage PSU consume more power than a low-wattage PSU with the same components?

Yes because efficiency of the power supply is dependent on the load that the power supply has on it. However the differences in good quality psu's are negligible in my opinion
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post #5 of 5
The system dictate the power it will get from the PSU not the other way arround ( except a surge ) and the PSU will not take 1000 watts from the wall at all time ( as think some persons I know ) it will take the amounts of power your system will consume .
    
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