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Old 03-12-2018, 07:00 PM   #17
Stefan Payne
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Join Date: Dec 2009
City & State: Northern Germany
My Country: Germany
Line Voltage: 230VAC/50Hz or 400VAC/3P/50Hz
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Posts: 1,259
Default Re: How many uf do i need to cope with the HDD inrush current

Originally Posted by evilkitty View Post
my PSU is a Seasonic M12II 520W
That could be the problem.
That one is ancient (since 2010), has low capacitance on +12V and is group regulated.

That could cause an issue because the +12V Rail drops and possibly also the +5V because of the increased load of +12V...

Do you have an independently regulated PSU lying around you could try?
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