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Mine quit working! I had an RX580 working and when my Mac Pro updated overnight I now have no video... and I have work to do! Any suggestions?!
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rx 580 and rx 480 in in mac pro 5,1
- Thread starter VillasManzanill
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Mine quit working! I had an RX580 working and when my Mac Pro updated overnight I now have no video... and I have work to do! Any suggestions?!
FWIW. Using a 6 pin to 8 pin adapter is playing Russian roulette if you are doing anything to stress your card, like benchmarks, mining, final cut rendering, etc. Basically anything stressing the card.
150 Watts is the hardware spec for your installation. You are drawing 75 Watts from the pcie connector + an additional 203 at max draw on the 6 pin line that’s rated at 75 Watts. That’s more than enough to wreck havoc on your logic board.
Search the forums. There are plenty of cmps that were blown with excessive power draw from video cards.
$12 is a small price to pay considering the cost of the components involved.
If you post over at the Netkas forum, you can chat with the worlds leading hardware expert on Mac Pro gpu’s... MacvidCards.
150 Watts is the hardware spec for your installation. You are drawing 75 Watts from the pcie connector + an additional 203 at max draw on the 6 pin line that’s rated at 75 Watts. That’s more than enough to wreck havoc on your logic board.
Search the forums. There are plenty of cmps that were blown with excessive power draw from video cards.
$12 is a small price to pay considering the cost of the components involved.
If you post over at the Netkas forum, you can chat with the worlds leading hardware expert on Mac Pro gpu’s... MacvidCards.
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FWIW. Using a 6 pin to 8 pin adapter is playing Russian roulette if you are doing anything to stress your card, like benchmarks, mining, final cut rendering, etc. Basically anything stressing the card.
150 Watts is the hardware spec for your installation. You are drawing 75 Watts from the pcie connector + an additional 203 at max draw on the 6 pin line that’s rated at 75 Watts. That’s more than enough to wreck havoc on your logic board.
Search the forums. There are plenty of cmps that were blown with excessive power draw from video cards.
$12 is a small price to pay considering the cost of the components involved.
If you post over at the Netkas forum, you can chat with the worlds leading hardware expert on Mac Pro gpu’s... MacvidCards.
You should go for these charts when analysing power draw.
When gaming (under normal high stress), this RX480 only draw ~58W from the PCIe slot (not 75W). And another ~163W from the 8pin (more than 150W).
And in general, we don't need to consider the momentary peak. That's just for info only. Power spike in GPU is very very normal, and that's always outside the rated limit. But your calculation was coincidentally match the chart. The peak power draw from the 8pin is ~203W in this case. If we put this peak value into consideration, then even dual mini 6pin (rated up to 150W in total) can't safely power this card.
Anyway, there is no way to use single mini 6pin to power this card. In fact, the review shows even using "dual mini 6pin to single 8pin" also not safe (at least true for those who insist each mini 6pin can only deliver 75W but even draw 0.1W more is unsafe
).
You should go for these charts when analysing power draw.
View attachment 766200
When gaming (under normal high stress), this RX480 only draw ~58W from the PCIe slot (not 75W). And another ~163W from the 8pin (more than 150W).
And in general, we don't need to consider the momentary peak. That's just for info only. Power spike in GPU is very very normal, and that's always outside the rated limit. But your calculation was coincidentally match the chart. The peak power draw from the 8pin is ~203W in this case. If we put this peak value into consideration, then even dual mini 6pin (rated up to 150W in total) can't safely power this card.
Anyway, there is no way to use single mini 6pin to power this card. In fact, the review shows even using "dual mini 6pin to single 8pin" also not safe (at least true for those who insist each mini 6pin can only deliver 75W but even draw 0.1W more is unsafe
Thanks for clarifying the risk. Where there is a will, there is a way.
There are forums dedicated to crypto mining that have pre-baked firmware, as well as tools, for modifying the power draw of most AMD RX5x0 cards.
[GUIDE][TUTORIAL][XMR,ETH,ETN]How To Mod Bios RX470/570/480/580 VEGA Mining
Thanks for clarifying the risk. Where there is a will, there is a way.
There are forums dedicated to crypto mining that have pre-baked firmware, as well as tools, for modifying the power draw of most AMD RX5x0 cards.
[GUIDE][TUTORIAL][XMR,ETH,ETN]How To Mod Bios RX470/570/480/580 VEGA Mining
I always mod the firmware myself to reduce power draw and heat when with the AMD cards. This can also allow the card to stay at higher clock speed due to less thermal restrain. But now, both Pascal and Vega's ROM can't be modified anymore.
I tried using a mini 6-8pin on my rx580. It worked except the fans stop when it is fully booted.
Modern cards have a idle feature that allow the card to not spin fans unless it starts chewing and needs to cool. This is how they get lower noise profile ratings. Run something like Valley or geekbench GPU test and you’ll notice that they should indeed start spinning.
Alright ill give that a try. I have noticed that most people just use 2 mini 6pin to 6pin and a dual female 6pin to 8 pin adapter. I wonder if the lack of power is the problem. Thanks for the response!
You should NOT use single mini 6pin to single 8pin on the RX480 or RX580. The actual power draw from this card (under stress) usually way outside a single mini 6pin can practically deliver.
However, this has nothing to do with the zero fan RPM. As the above stated. That’s a new feature on the modern graphic cards.
In your case, when the card try to draw more than the mini 6pin can supply. Your cMP will shutdown. But not the card’s fan stop spinning.
I had another mini 6pin to 6pin connector attached to the other power connector. But I decided to just play it safe and get the two mini 6pin to dual female 6pin to 8pin adapter.
However I'm curious...How is it possible to power dual rx 580's or 480's? Are you routing power from the sata ports and replacing the power supply?