MP 1,1-5,1 Sapphire RX580 Install

[wkiskey_alpha]

Hello,

I installed my RX580 a long time ago, propbably not an efficent or properly working install, but working (relative term).

The fans have never worked on it, so I decided to stop using the Mac Pro and shelve it for awhile (two years later)..

I have been reading the related RX580 threads and am not seeing my unique scenario for my fans not working.

I see that there may be an improper method of using the power cables, and there might be a way to resolve the fans not working as well.

Any guidance is greatly appreciated.

 

[arw]

But you are aware of the zero rpm fan mode, meaning the fans deliberately stay off until a temperature of 53°C is reached?

 

[chrfr]

View attachment 2029839

Hello,

I installed my RX580 a long time ago, propbably not an efficent or properly working install, but working (relative term).

The fans have never worked on it, so I decided to stop using the Mac Pro and shelve it for awhile (two years later)..

I have been reading the related RX580 threads and am not seeing my unique scenario for my fans not working.

I see that there may be an improper method of using the power cables, and there might be a way to resolve the fans not working as well.

Any guidance is greatly appreciated.

Maybe a dumb question, but did you connect any of the fan power cables when installing the card?

 

[wkiskey_alpha]

But you are aware of the zero rpm fan mode, meaning the fans deliberately stay off until a temperature of 53°C is reached?

I am, yes. They never initalize, card overheats, locks up, reboot. I didn't want to damage the card, and I was at an impasse that I needed graphics to function properly, so I stopped using the system for some time.

 

[wkiskey_alpha]

Maybe a dumb question, but did you connect any of the fan power cables when installing the card?

Not a dumb question at all - Yes, I did. the card locked up when a graphics load was introduced, as the fans never initialized. Its currently using both 6-pin ports.

 

[arw]

Yes, I did. the card locked up when a graphics load was introduced, as the fans never initialized. Its currently using both 6-pin ports.

Have you double-checked if the two 6-pin connectors are properly connected to the motherboard?
Two 6-pin to single 8-pin power should be ok for the Sapphire RX 580.
How do you know the GPU is overheating and it’s not the Mac Pro‘s over-current protection kicking in? Have you monitored the temperature of the GPU?
Have you checked the actual fan connector on the GPU?

 

[MarkC426]

I installed my RX580 a long time ago, propbably not an efficent or properly working install, but working (relative term).

What exactly does this mean.......
Did it not work from day 1, was it a new GPU?

The RX580 works (perfectly) from Sierra upwards.