Evga 680gtx

Discussion in 'Mac Pro' started by Pyzon2011, Dec 27, 2014.

  1. Pyzon2011 macrumors newbie

    Joined:
    Dec 27, 2014
    #1
    Just received a gtx680 and it came with a single power cable that is split to to go to both power sockets on the card..any dicumentation i have read has it listed with two separate power cables?? Should i have any issues running off one power feed ( as long as i dont use the other) .

    I am pyzon, just deleted email account associated with that uname and had to re-register, maybe an admin can get my email changed.
     
  2. EdDuPlessis, Dec 27, 2014
    Last edited: Dec 27, 2014

    EdDuPlessis macrumors 6502

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    Nov 23, 2014
    #2
    Depends if you have dual 6 pin version or 6 + 8 pin version. The various configurations for powering an internal graphics card are below:

    A. 1 x PCIE Booster to 1 x 6 pin connector (75w) + PCIE slot (75w) = 150w

    B. 2 x PCIE Booster to 2 x 6 pin connectors (150w) + PCIE slot (75w) = 225w

    C. 2 x PCIE Booster to 1 x 8 pin connector (150w) using adaptor + Dual SATA to 6 pin connector using adaptor (108w max) + PCIE slot (75w) = 300-333w

    You have to sacrifice drive bays for the last one using this cable.

    http://uk.startech.com/Cables/Compu...s-Video-Card-Power-Cable-Adapter~SATPCIEXADAP

    Two people here have been successful with config C. The main issue is discovering if the SATA rail will be safe for long term.

    Most here advise against trying to draw 150w from a single 75w PCIE Booster motherboard connector by using a Y splitter even if other people have done it. We don't have long term safety reports.
     
  3. Pending macrumors regular

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    Oct 1, 2014
    #3
    Use two cables (cheap to buy) and enjoy.
     
  4. Pyzon2011 thread starter macrumors newbie

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    Dec 27, 2014
    #4
    Thanks for the advice, this is a brand new card from owc. I may get two cables in place of one although i assume owc would not sell it the way it is if it caused problems.

    ----------

    I have dual 6-pin version
     
  5. flowrider macrumors 601

    flowrider

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    #5
  6. mikeboss macrumors 65816

    mikeboss

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    switzerland
    #6
  7. Pyzon2011, Dec 27, 2014
    Last edited: Dec 27, 2014

    Pyzon2011 thread starter macrumors newbie

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    Dec 27, 2014
    #7
    Yes it is mac edition, i contacted owc about it. Box was sealed so not sure owc had anything to do with the supplied cables in the box. Not sure if something recently changed, or not. Never had a problem with owc myself, just found it odd to find a Y split power cable as most have pointed out this shouldnot be the norm even on evga site, cheers.

    Edit even the box says two cables and it had the official evga seal in it, back to owc! Thanks
     
  8. Pyzon2011, Dec 27, 2014
    Last edited: Dec 27, 2014

    Pyzon2011 thread starter macrumors newbie

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    Dec 27, 2014
    #8
    Owc tell me the specs have changed! Bounced over to evga now for some answers..

    Incorrect cable in box, but not shipping replacements until after jan6 so just ordered 2 from the anove ebay link, thanks..
     
  9. MacVidCards Suspended

    Joined:
    Nov 17, 2008
    Location:
    Hollywood, CA
    #9
    Baloney.

    Did the "Y" cable have the Mini PCIE end that went on a cMP logic board?

    Or was it a standard PC GTX680 y cable?

    Would be pretty funny if OWC has joined the flashing game and is sending out flashed PC cards.

    Did the box say "Mac Edition" anywhere on it?

    Card itself should also say "Mac Edition" on it as well.

    Will be interesting to get to the bottom of this.
     
  10. Pyzon2011 thread starter macrumors newbie

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    Dec 27, 2014
    #10
    Answers within
     
  11. MacVidCards Suspended

    Joined:
    Nov 17, 2008
    Location:
    Hollywood, CA
    #11
    Somebody packed PC power cables in the box.

    That Dual-Molex to PCIE is regular PC thing, not of much use in a cMP.
     
  12. iBuildMacs macrumors member

    iBuildMacs

    Joined:
    Dec 29, 2014
    #12
    I've purchased genuine Mac Edition GTX680 on multiple occasions and the package always came with 2 cables. I recommend using two cables. They sell them on eBay super cheap.
     

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