How do redundant power supplies work?

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pioneerx01

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Let’s say (theoretically) that I have redundant power supply rated at 500W. Since it has two modules that mean each is capable of outputting 500W (theoretically). If the first 500W one fails the second 500W one will kick in automatically and seamlessly.

Now if both modules are working properly and my computer spikes required wattage (theoretically) to 700W will the second module kick in and compensate for the insufficient wattage of the first one?
 
no -- by design the PSU is designed to avoid sinlge point of failure, NOT to provide power overload support.
if you need 700w, you need a PSU of that specification.
 
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