[SOLVED] Wattage on PSU, does it matter?

[DiabloDizzy]

Hello again,

so, there is someone in local forum that argue his house can't handle psu above 500w.

Then I thought, is this true? Isn't the low-high wattage of the psu dependent on the components and load?
Isn't it that if the PC asks for a little wattage, it will still be given a little wattage?
At the same component and load, is the 450w psu more efficient than the psu above it?
Or how about 80+ rating?, is a 450w psu with 80+ white more efficient than a 650w psu with 80+ platinum in the same component and load?

 

[DiabloDizzy]

is there a difference in wattage on a 1000w psu with a 450w psu if the components and load are the same?

 

[DSzymborski]

The person on the forum has no idea what they're talking about. PSUs only generate the power requested. If a 1000W PSU had to generate 1000 watts at all times, you'd have a very high electric bill and an incredibly hot room; watts are heat.

If the components of a PC want 400W, then the PSU will give it 400W. A PSU will draw 480W to get that 400W to the components if the PSU at 80% efficiency, 444W at 90%.

 

[DiabloDizzy]

The person on the forum has no idea what they're talking about. PSUs only generate the power requested. If a 1000W PSU had to generate 1000 watts at all times, you'd have a very high electric bill and an incredibly hot room; watts are heat.

If the components of a PC want 400W, then the PSU will give it 400W. A PSU will draw 480W to get that 400W to the components if the PSU at 80% efficiency, 444W at 90%.

Yeah i agree with you, maybe there is an internal issue that makes it unable to run psu above 500w