Using molex cables to power video card

Discussion in 'Mac Pro' started by hukko, Apr 21, 2015.

  1. hukko macrumors newbie

    Apr 21, 2015
    I have a Mac Pro 1,1 Mid 2006.

    To start using OS X Yosemite I had to buy new video card, so I bought MSI GTX650 TI OC 2GB. According to Nvidia web site my GPU Max TDP is 110 W, unfortunately MSI doesn't reveal whole video card power specification. I understand that generally accepted consensus is that the two 6-pin connectors on motherboard provide up to 225W. I didn't have mac specific PCI Express 6 pin power cable so I used Superdrive molex cables with molex to PCI express 6 pin adabter.

    I don't need Superdrive so is it safe and does super drive molex cables provide sufficient power to my video card or I should better buy that mac specific power cable.
  2. IowaLynn macrumors 65816


    Feb 22, 2015
    OWC and Amazon carry those cables for very little.

    Everything you want to know about different cables:

    > If your power supply doesn't have a 6 pin PCI Express cable then you can use the adapter shown above on the right to convert two 4 pin peripheral cables into a PCI Express cable.

  3. MacVidCards Suspended

    Nov 17, 2008
    Hollywood, CA
    Go ahead and blow $4.75 on a cable or two.

    Crazycon has them on EBay for that much, good quality and reliable seller.
  4. hukko thread starter macrumors newbie

    Apr 21, 2015
    Amazon doesn't ship to Estonia and on OWC it costs 20 $. If I buy from ebay it will take 1 month to arrive.

    I am already using this adapter. My question is: can I keep using "Superdrive 4 pin peripheral power cable" or it is better to buy mac specific power cable. I know that Mac Pro motherboard 6-pin connectors provide up to 225W, but does same apply to "Superdrive 4 pin peripheral power cable"

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