RX 480 power issue.

Discussion in 'Mac Pro' started by mavericks7913, Jan 6, 2017.

  1. mavericks7913 macrumors 6502

    Joined:
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    NY
    #1
    My Mac Pro 2010 kept shut downed by itself and I was trying to figure about this issue. I thought CPUs were overheating which cause this issue but today I assumed RX 480 might be the issue.

    Any solutions tho? I was thinking to look for Dual 6 pin to 6 pin cable but couldn't find any.
     
  2. h9826790 macrumors 604

    h9826790

    Joined:
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    #2
    For RX480, possible not the 6pin drawing too much, but the card drawing too much from the slot.

    AFAIK, it can draw more than 75W from the slot, and so far I've never seen anyone know the shut down protection limit about the slot. (For your info, the mini 6pin shut down limit is about 120W, I don't think the RX480 will draw that much from the 6pin).

    On the Windows side, this issue was fixed by driver update. That means this issue highly likely still exist in macOS.

    Anyway, what's your CPU temperature? Why you suspect that's was an issue? Also, did you check the north bridge temperature? Last but not least, is there any specific factor that related to the cMP shutdown? e.g. Only happened when GPU under stress.
     
  3. mavericks7913 thread starter macrumors 6502

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    NY
    #3
    yeah only if I play games. I already tested few things. CPUs were totally overheating but they had no issues even I turned on for 12 hours. While I was playing games, I increased fans speed for cooling CPUs but Mac Pro shut downed by itself. So I suspected that RX 480 might be the cause.
     
  4. h9826790 macrumors 604

    h9826790

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    #4
    So, you mean that you've already run the CPU stress test, they are overheating (what's the temperature anyway?) but didn't shut down. However, once you play games, the cMP shut itself down?

    You play games in macOS?
     
  5. mavericks7913 thread starter macrumors 6502

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    #5
    yeah. Temps were around 60~70 without fans
     
  6. h9826790 macrumors 604

    h9826790

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    #6
    I don't think 60-70 is overheating.
     
  7. mavericks7913 thread starter macrumors 6502

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    #7
    Still hot tho.

    My Mac Pro just shut downed while CPUs temps were around 32 while I was playing games.
     
  8. carpsafari Suspended

    carpsafari

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  9. ActionableMango macrumors 604

    ActionableMango

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    Sep 21, 2010
    #9
    Hard to know what to blame without seeing the data. Install some monitoring software so you can see how many watts the GPU is pulling from the slot and socket.
     
  10. Caesar_091 macrumors regular

    Caesar_091

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    Italy
    #10
    Just curious: could you suggest some software witch shows energy usage of the GPU?
     
  11. h9826790 macrumors 604

    h9826790

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    #11
    Hardware Monitor
    Screen Shot 2017-01-11 at 12.36.36.jpg

    FCPX 800:1250-1.jpg
     
  12. JoSch macrumors regular

    Joined:
    Feb 22, 2013
    #12
    I had until now no problems with my RX480 plus the HD5770, while rendering in FCPX or gaming.
    I have the normal Sapphire with no OC and one fan.
     
  13. vengeance72 macrumors newbie

    Joined:
    Jan 16, 2017
    #13
    I had this issue too. My 4.1 MP (flashed to 5.1) shut down automatically when I play WoW. Not always, but often and more often under rendering-stress. I have the XFX RX480 reference card installed and the 'shut-down-issue' comes definitely from the RX480. I think it is a heat problem or the card consumes to much power. Before upgrading to the RX480 I had the Geforce 680 Mac edition installed with absolutely no issues over time.

    One question, did you remove the backplate from your RX480 Sapphire card?

    The RX480 is a nice card but with this issue no option. So be careful when you think to upgrade.
     
  14. JoSch macrumors regular

    Joined:
    Feb 22, 2013
    #14
    No, I have left the backplate on it. I remember, that somebody posted that the XFX version is to blame for problems.
    The Sapphire version runs without any problems. Yesterday, I did some heavy rendering in FCPX.
     
  15. vengeance72 macrumors newbie

    Joined:
    Jan 16, 2017
    #15
    Thank you. Could you please tell me which Sapphire card do you have installed? I think I will change my XFX card and I will make no more mistakes.

    @mavericks7913: To proof and for the rest of us: Do you have a XFX card installed also?
     
  16. JoSch macrumors regular

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    #16

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