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

kkinto

macrumors member
Original poster
Apr 29, 2011
71
9
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)
 

bookemdano

macrumors 65816
Jul 29, 2011
1,409
790
Is the card new? Sounds like it's dying (assuming you've already checked cabling, etc.)
 
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tsialex

macrumors G3
Jun 13, 2016
8,599
9,158
Yes its about two weeks installed
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.
 
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Eneco

macrumors regular
Jul 1, 2018
117
14
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.

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 ^^
 
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h9826790

macrumors G5
Apr 3, 2014
14,982
7,338
Hong Kong
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 ^^

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)
 
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Eneco

macrumors regular
Jul 1, 2018
117
14
However, this bug only affect single monitor system, and only happen in 2D low GPU demand environment (e.g. Finder, Safari).

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.
 
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h9826790

macrumors G5
Apr 3, 2014
14,982
7,338
Hong Kong
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.

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/
[doublepost=1539101927][/doublepost]
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)

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).
 
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kkinto

macrumors member
Original poster
Apr 29, 2011
71
9
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.
 
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kkinto

macrumors member
Original poster
Apr 29, 2011
71
9
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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cdf

macrumors 65816
Jul 27, 2012
1,036
976
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?

I don't think so. My box has the same sticker, and I have had no problems whatsoever.
 
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h9826790

macrumors G5
Apr 3, 2014
14,982
7,338
Hong Kong
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?

Dump the card's ROM, post it to here, then we can have a look if the parameters are normal
 
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kkinto

macrumors member
Original poster
Apr 29, 2011
71
9
Dump the card's ROM, post it to here, then we can have a look if the parameters are normal

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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robogobo

Suspended
Jun 6, 2005
439
57
Sitting down facing front.
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!
Hey did you ever resolve this? I'm getting a flickering in the white areas on safari whenever I scroll a page. Interestingly it happens mostly here on the macrumors site, but also slightly less so on others...
 
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MIKX

macrumors 68000
Dec 16, 2004
1,789
665
Aussie in Japan
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!
Just to be clear on your RX 580 power cable setup.

The correct cable for the RX 580 ..

TWO x Mini 6 pin from the Mac Pro motherboard to ONE by 8 pin to the RX 580's 8 pin socket
( Amazon.com https://www.amazon.com/COMeap-Express-Video-Adapter-15-inch/dp/B07J336WY4

Does your cable look like this . . .. ?

Two Mini 6pin to ONE 8 pin for mac Pro.png
 
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