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1Good answer, but shouldn't the power values in the last two paragraphs be 0.45W and then 0.8W? Regardless, the point is that P=I^2R, so increasing I significantly increases P (the waste power dissipation).– sblairCommented Feb 25, 2010 at 0:52
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Good catch - I incorrectly used 10A to calculate the power (typo). P=I^2R is an elegant way to summarize it!– Fred HamiltonCommented Feb 25, 2010 at 1:05
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2Nice answer. +1 for actually calculating stuff, and explaining the calculations.– sleskeCommented Feb 25, 2010 at 1:39
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Very nice answer, shame you couldn't have got it answered a bit quicker– EarlzCommented Feb 25, 2010 at 16:55
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1This should be the accepted answer. Although the accepted one contains valuable information, the question was specifically about, quote, "What happens to a PSU in a brownout to damage it", not what happens to motherboard. So this is the right answer for this specific question. You saved me from distroying a printer PSU, because I was going to modify it to work with 110VAC instead of the rated 220VAC– Abraham ToledoCommented Jun 15, 2018 at 14:32
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