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How much watts do hard drives take up?

post #1 of 7
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So, i thought my hard drive was broken (640gb), went and brought a new one. (500gb) few weeks that broke down the line (at least i thought so) so i went and brought another one (500gb seagate im using now)

Now i've come to the conclusion that the hard drives never broke, something else did. I now have my other 2 hard drives just sitting there doing nothing, and im about to make a new build.

Just curious, how many watts to these hard drives take up? under load and off load.

Samsung spinpoint (500gb)
WD cavier (640gb)
    
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post #2 of 7
like max 20w i think its more like 10 though
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post #3 of 7
around 20, maybe 30 watt each.
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post #4 of 7
Look at the sticker on the drive.

For example this Hitachi I am holding says 12V - 700mA and 5v - 500mA.

A bit of multiplication and I get 8.4 watts on the +12v, and 2.5 watts on the +5v, or 10.9 watts total.
post #5 of 7
(green) SATA 6W
(High rpm) SATA 20W
(regular) SATA 13W

numbers can be a little off the real numbers .
    
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post #6 of 7
Quote:
Originally Posted by Towik View Post
(green) SATA 6W
(High rpm) SATA 20W
(regular) SATA 13W

numbers can be a little off the real numbers .
Does anyone know if those numbers are purely from the 12V rails?
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post #7 of 7
Quote:
Originally Posted by Sora1421 View Post
Does anyone know if those numbers are purely from the 12V rails?
No. Hard drives draw power from both the +12v and +5v rails.


Hard drives can hit 35w momentarily during spin-up. Then most recent hard drives consume less than 12w. Eco/Green/Laptop drives tend to consume less than 8.


The spin-up power draw can be an issue if you have lots of hard drives. Advanced controllers have something called staggered spin up which turns on a few HDs at a time.
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