Do SSD's go to sleep or just idle?

Discussion in 'MacBook Pro' started by altecXP, May 2, 2011.

  1. altecXP macrumors 65816

    Aug 3, 2009
    Looking at the new revamped OWC SATAIII SSD vs a WD 7200RPM 500GB HDD, the SSD has a higher read/write power draw @ 2.5W vs the HDD's 1.75, and a higher idle @ 1.2 vs 0.80. I know that the SSD can do the work much faster than the HDD but with that power draw I can see how the SSD can easily end up using just as much if not more power than the HDD.

    But the root of my question is: Is the SSD turned off when the laptop is in sleep or standby?

    I ask because there is no power draw listed on OWC's side for these mods but the WD site lists 0.40W when in sleep or standby. If the SSD is still using 1.2W when in these modes thats about 3x's the power usage
  2. Hellhammer Moderator


    Staff Member

    Dec 10, 2008
    My understanding is that the SSD (as well as HD) will be powered off completely when entering the sleep mode, thus it should not use any power at all.

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