Power supply - recommending 500W for Motherboard, delivering 400W for build?

A curiosity.
I notice that the recommendation for the AI Max+ 395 motherboard power supply is “… a 500W or higher ATX, SFX, or FlexATX power supply to handle maximum peak load, though continuous load will stay under 350W.”

By contrast, the built Desktop power supply is “400W”

Why recommend 500W but supply 400W? As has often been the case, I’m missing something for sure?

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The official Framework PSU is actually capable of 600W, but down-rated to 400W where it is more efficient. Most likely, the recommendation is to prevent people from buying cheaper 400W power supplies, which could be unsafe if the power draw on them is maxed out for any extended period.

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Oh, that’s interesting @Morpheus636 thank you

Where did you get that info about the 600W down-rated to 400W?

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Should be in this LTT video: https://youtu.be/-lErGZZgUbY?t=424

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Excellent, thank you again @Morpheus636

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