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Query about USB 3.0 PCI-E card

  • 06-04-2018 01:45PM
    #1
    Beta Ray Bill
    Registered Users, Registered Users 2, Paid Member Posts: 3,971 ✭✭✭


    Hey

    I bought this: AUKEY 4 Ports PCI-E To USB 3.0 Expansion Card PCI Controller

    As you can see from the Screen shot there is molex power adapter on this.

    447491.jpg

    I can see from the device manager that the 3.0 device is available.

    447492.jpg

    The question is do I need to power this USB 3.0 Device?
    IE do I need to power it from my power supply?


Comments

  • #2
    TheBoyConor
    Closed Accounts Posts: 3,283 ✭✭✭TheBoyConor


    I would say you'd need to attach the molex to supply enough power to be able to run all 4 ports together at full power capacity. I don't know if it will even work at all without the molex attached....


  • #3
    Beta Ray Bill
    Registered Users, Registered Users 2, Paid Member Posts: 3,971 ✭✭✭Beta Ray Bill


    TheBoyConor wrote: »
    I would say you'd need to attach the molex to supply enough power to be able to run all 4 ports together at full power capacity. I don't know if it will even work at all without the molex attached....

    Thats kind of what I though

    IE it will work.... but not at capacity


  • #4
    TheBoyConor
    Closed Accounts Posts: 3,283 ✭✭✭TheBoyConor


    is the PCI bus able to supply power? Or does it only do data?

    If say the op were to plug in 4 thirsty USB devices without the molex attached and it worked, would the be a possibility of damaging the motherboard due to drawing too much power?


  • #5
    ED E
    Registered Users, Registered Users 2 Posts: 36,095 ✭✭✭✭ED E


    Lol, the Amazon listing has Molex as Sata Power. Good job Aukey.
    The limitations are imposed by the PCI-E standard. 25w for x1 or x4 cards, 25w for half height cards

    5v 1.5A = 7.5W
    7.5 x 4 = 30W
    30W > 25W Ooooh.

    Basically that's supplementary power to stop your mobo freaking out if you connect 4 smartphones to charge. If you connect 4 keyboards it will likely function fine.


  • #6
    Beta Ray Bill
    Registered Users, Registered Users 2, Paid Member Posts: 3,971 ✭✭✭Beta Ray Bill


    ED E wrote: »
    Lol, the Amazon listing has Molex as Sata Power. Good job Aukey.



    5v 1.5A = 7.5W
    7.5 x 4 = 30W
    30W > 25W Ooooh.

    Basically that's supplementary power to stop your mobo freaking out if you connect 4 smartphones to charge. If you connect 4 keyboards it will likely function fine.

    So connect the power to it?


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  • #7
    ED E
    Registered Users, Registered Users 2 Posts: 36,095 ✭✭✭✭ED E


    No reason not to, unless you're really really OCD about cable management.


  • #8
    Beta Ray Bill
    Registered Users, Registered Users 2, Paid Member Posts: 3,971 ✭✭✭Beta Ray Bill


    Ok powered it up and restarted PC....

    I hasn't gone on fire, so happy

    Thanks All


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