6 pin PCI E cables - Radeon 6870 fan noise

Discussion in 'Mac Pro' started by mjsmke, Feb 20, 2013.

  1. mjsmke, Feb 20, 2013
    Last edited: Feb 23, 2013

    macrumors 6502a

    Joined:
    Mar 2, 2010
    Location:
    UK
    #1
    Hi there!

    I just picked up a second hand PowerColour 6870 for my Mac Pro 4.1. (thought it was time to upgrade the GT 120!)

    I know i need 2 power cables and found a link on here to OWC:

    http://eshop.macsales.com/item/Apple/9227128/

    I'd prefer to get them sooner so started looking around online but can't find any anywhere. I can only find male to female extensions.

    Does anyone know where to find them in the UK?
     
  2. Loa
    macrumors 65816

    Loa

    Joined:
    May 5, 2003
    Location:
    Québec
    #2
    Hello,

    Search for "pcie g5 power cable" in ebay.

    Loa
     
  3. cal6n, Feb 20, 2013
    Last edited: Feb 20, 2013

    macrumors 68000

    cal6n

    Joined:
    Jul 25, 2004
    Location:
    Brighton, UK
  4. macrumors newbie

    mactune

    Joined:
    Feb 20, 2013
    #4
    The cable you need is called mini pci-e 6pin to pci-e 6pin.
    Hope this helps.
     
  5. thread starter macrumors 6502a

    Joined:
    Mar 2, 2010
    Location:
    UK
    #5
    Thanks for all the help everyone. I now have the cables i needed and have my 6870 installed and working! :)

    The card works fine but the fan isn't all that quiet. My old GT 120 was silent all the time. Is this normal? Or is there a way to lower the idle speed of the GPU fan?

    P.S What a difference this card makes! I know its not one of the best cards out there but in applications like Photoshop/Lightroom/Maya and even just moving windows around the monitors feel smoother.
     
  6. macrumors 65816

    DanielCoffey

    Joined:
    Nov 15, 2010
    Location:
    Edinburgh, UK
    #6
  7. Loa
    macrumors 65816

    Loa

    Joined:
    May 5, 2003
    Location:
    Québec
    #7
    Hello,

    Idling 6870 should be very quiet.

    Try this thread.

    Loa
     
  8. thread starter macrumors 6502a

    Joined:
    Mar 2, 2010
    Location:
    UK
    #8
    That thread seems to be about the PCI fan running fast, not the GPU fan.
     
  9. macrumors 68000

    cal6n

    Joined:
    Jul 25, 2004
    Location:
    Brighton, UK
    #9
    The fans that ATI use are generally silent but a few of them seem to fail early and become quite noisy. If this is the case with yours, you'll be able feel a little sideways play in the bearing. There should be none whatsoever. Since the fans are virtually unobtainable in the UK, these noisy cards tend to wind up on eBay.

    You can either buy a new fan from the states on eBay for about £13 or fit an aftermarket cooler for upwards of £35.

    I sometimes come across reference design 5870s (a better choice than the 6870, strangely enough) and fit a new fan as a matter of course before flashing them and selling them on.
     
  10. thread starter macrumors 6502a

    Joined:
    Mar 2, 2010
    Location:
    UK
    #10
    Thanks for the help. If I don't get use to the sound i'll look at getting a replacement fan.
     
  11. macrumors 604

    Joined:
    Nov 17, 2008
    Location:
    Hollywood, CA
    #11
    6870s with 2 wire fans are much noisier than ones that come with 4 wires.

    If it only has 2 wires, it has limited speed control at best, so to avoid overheating they run them faster. The card stays cool until the fan wears out prematurely.
     
  12. thread starter macrumors 6502a

    Joined:
    Mar 2, 2010
    Location:
    UK
    #12
    I'll have a check tomorrow to see if its a 2 or 4 wire fan and let you know.

    I remove an reinstalled it earlier but didn't think to look at the wires. I noticed when i lift the corner of the card about 2mm the noise is reduced. So ill also check the case is screwed on tight when i get a chance.
     
  13. macrumors 68030

    slughead

    Joined:
    Apr 28, 2004
    #13
    My sapphire is dead quiet, my XFX is ridonculously loud.
     

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