5,1/10.14-Intermittent Video Flashing (RX580)

Discussion in 'Mac Pro' started by kkinto, Oct 8, 2018.

  1. kkinto macrumors newbie

    kkinto

    Joined:
    Apr 29, 2011
    #1
    Hi, I am getting intermittent/random screen flashes (looks like the screen flashes a frame or 10 of digital garbage and 'drops' (image appears to move down) suddenly and quickly back to normal). Sometimes two or three times in relative rapid succession.

    Sometimes happening often, other times not so. Not a train smash but most annoying when doing work that requires finesse, concentration and detail on screen!

    Any ideas on what it is or similar experiences?

    10.14 (18A391)
     
  2. bookemdano macrumors 65816

    Joined:
    Jul 29, 2011
    #2
    Is the card new? Sounds like it's dying (assuming you've already checked cabling, etc.)
     
  3. kkinto thread starter macrumors newbie

    kkinto

    Joined:
    Apr 29, 2011
  4. tsialex macrumors 603

    tsialex

    Joined:
    Jun 13, 2016
    Location:
    Brazil
    #4
    Long shot, but where did you bought this card?

    Cryptocurrency miners are dumping GPUs on eBay and usually the cards have special miner firmware that needs to be removed and the original restored.
     
  5. bookemdano macrumors 65816

    Joined:
    Jul 29, 2011
    #5
    Did it have this problem right away? Or it worked fine for two weeks and now does not?

    Can you return it? If so then you should.
     
  6. Eneco macrumors member

    Joined:
    Jul 1, 2018
    #6
    I'm getting the same glitches with a flashed R9 280X and always thought it's a driver issue. Therefore I was planning to switch to the RX 580 ^^
     
  7. h9826790 macrumors G5

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #7
    Most likely R9 280X is another issue. There is a known driver bug for some 7xxx card, mainly affected the Sapphire HD7950 Mac Edition card. I wrote the possible fix at here.

    https://forums.macrumors.com/thread...7950-mac-edition.1603588/page-2#post-20513990

    However, this bug only affect single monitor system, and only happen in 2D low GPU demand environment (e.g. Finder, Safari). If you also see flickering in Windows, or with multi monitor connected, or in any 3D applications. Then 99% you has hardware issue (may be the card, may be the cable, may be the monitor, or even may be the slot)
     
  8. Eneco macrumors member

    Joined:
    Jul 1, 2018
    #8
    That's exactly the situation when it is happening. Thanks for the link, but as the GPU consumes too much power I'm getting rid of it anyway.
     
  9. h9826790 macrumors G5

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #9
    The PULSE RX580 works really well on my cMP in 10.14.0.

    In fact, there is a V2 now which has dual ROM. So that you can safely mod one of the ROM to make it draw ~30% less power, or 20% more performance.

    https://forums.macrumors.com/threads/sapphire-pulse-rx580-8gb-vbios-study.2133607/
    --- Post Merged, Oct 9, 2018 ---
    If you sure both the monitor and cable are good. Then not much you can try apart from re-seat the card and clean the slot (blow away the dust). However, if that's a used card from miner. As tsialex said, may be you get a bad card, or a ROM that's not really for this card, etc.

    It's hard to tell what's wrong in this case, you better return it (if you can).
     
  10. kkinto thread starter macrumors newbie

    kkinto

    Joined:
    Apr 29, 2011
    #10
    OK, cables and connectors all check out okay. Supplier told me to sit on it while they get another card to come and test. Its not super critical bad, but definitely annoying.
     
  11. kkinto thread starter macrumors newbie

    kkinto

    Joined:
    Apr 29, 2011
    #11
    I have received and installed a brand new replacement card. It still does the random flash. Not as often though or maybe thats because its only been running a day. I see lots of mentions of glitches on reddit with these cards - they call it "blinking" which is actually a good description.

    On the box (both the original and the new replacement) is a sticker that reads "Overclock" with a little logo. Could this maybe be an issue?

    Is there any way to check if its power related or what its running specs are?
     

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  12. cdf macrumors 6502

    Joined:
    Jul 27, 2012
    #12
    I don't think so. My box has the same sticker, and I have had no problems whatsoever.
     
  13. h9826790 macrumors G5

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #13
    Dump the card's ROM, post it to here, then we can have a look if the parameters are normal
     
  14. kkinto thread starter macrumors newbie

    kkinto

    Joined:
    Apr 29, 2011
    #14
    Hi, I am not sure I know how to do that! Looking at other posts it seems to all be Windows software. Do I need to do that on a PC or maybe create a bootcamp drive first? Is that possible without the boot screens?
    (apologies for the lag but I was away for two weeks!)
    Also I changed the power cables again - it had 2 x 6 pins (M/M) to a Y-female -> Male into the card. It now has a single split 6pin to 8 pin direct Y cable from the motherboard into the 580. Still flashing. It seems not as much(?) but that may just be wishful thinking!
     

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13 October 8, 2018