12 HDD's take how much PSU ??

Anyone know how much power it takes for a HDD ?

I read that green drives take about 20 watts and standard drives can take 35 watts.

I am running SSD and velociraptors in my main rig- but I want to build a new storage server with WD black drives 2TB x 20 for storage.

Any idea how much power that really would need?
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More about tomshardware
  1. 2TB Western Digital Caviar Black (WD2001FASS) Specifications:

    Transfer Rates: (Serial ATA): 3 Gb/s (Max)
    User Sectors Per Drive: 3,907,029,168
    Physical Dimensions: 1.03 x 5.79 x 4.00"
    Operating Shock (Read): 30G, 2 ms
    Non-operating Shock: 300G, 2 ms
    (Acoustics) Idle Mode: 29 dBA (average)
    (Acoustics) Seek Mode 0: 34 dBA (average)
    (Acoustics) Seek Mode 3: 30 dBA (average)
    Temperature (English)
    Operating: 32° F to 140° F
    Non-operating -40° F to 158° F

    Power Dissipation
    Read/Write: 10.70 Watts
    Idle: 8.20 Watts
    Standby: 1.30 Watts
    Sleep: 1.30 Watts
  2. Try finding a power supply with twenty SATA power connectors on it.

    You also need to take into consideration the total start-up current from the +12V and +5V rails when all of the drives start to spin up when the power to the drives is first turned on and you don't have any control over allowing a staggered start-up of each HDD.

    2TB Western Digital Caviar Black (WD2001FASS)
    Startup Current +12V: 1.16 Amps
    Startup Current +5V: 0.60 Amps
    Read/Write: 10.70 Watts
    Idle: 8.20 Watts
    Standby: 1.30 Watts
    Sleep: 1.30 Watts

    With twenty of these HDDs you can expect a start-up current draw from the +12V rail(s) to be at least 23.2 Amps or greater and from the +5V rail to be 12 Amps or greater.

    The power supply needs to be robust enough to handle this inrush current on those rails.
  3. Your bios may have an option to stagger HDD spin-up to save on needing so much extra power just to start your motors.
  4. ko888 said:
    Try finding a power supply with twenty SATA power connectors on it.

    You also need to take into consideration the total start-up current from the +12V and +5V rails when all of the drives start to spin up when the power to the drives is first turned on and you don't have any control over allowing a staggered start-up of each HDD.

    2TB Western Digital Caviar Black (WD2001FASS)
    Startup Current +12V: 1.16 Amps
    Startup Current +5V: 0.60 Amps
    Read/Write: 10.70 Watts
    Idle: 8.20 Watts
    Standby: 1.30 Watts
    Sleep: 1.30 Watts

    With twenty of these HDDs you can expect a start-up current draw from the +12V rail(s) to be at least 23.2 Amps or greater and from the +5V rail to be 12 Amps or greater.

    The power supply needs to be robust enough to handle this inrush current on those rails.


    Awesome Thanks !

    I might just add a second PSU.

    I have a 1200watt now. My case has enough room for it .
  5. You don't need an additional PSU to power up 20 hard disks.
  6. Use several of these:

    4-pin Molex peripheral connector to Dual 15-pin (right-Angled) Serial ATA power adapter

    http://www.newegg.com/Product/Product.aspx?Item=N82E16812119239

  7. ko888 said:
    Use several of these:

    4-pin Molex peripheral connector to Dual 15-pin (right-Angled) Serial ATA power adapter

    http://www.newegg.com/Product/Product.aspx?Item=N82E16812119239

    http://images10.newegg.com/NeweggImage/productimage/12-119-239-03.jpg


    I got about 10.... lol
  8. ReviverSoft said:
    http://extreme.outervision.com/psucalculatorlite.jsp

    ^ Why don't you give this utility a try?

    Not accurate enough.
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