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Black screen with Sapphire Pulse Radeon RX 580 8GB on MacPro 2010

H

hendrik_ge

macrumors newbie
Original poster
May 21, 2018
5
4
Hi Folks,
I do have a 2010 Mac Pro with MacOS 10.13.4 running. Bootcamp is in place for a second hard drive and macOS harddrive has filevault.
I bought a Sapphire Pulse Radeon RX 580 with 8GB but booting with this card just brings a black screen. No logon screen or anything else. It just brings two times the startup sound (about 10 seconds in between).
Power is connect with one 6 pin to 8 pin cable.
Do I need some drivers oder something else?
 
Last edited:
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Two things I’d consider exploring.

If the card only has a single 8-pin connection on it, then I’d get a double 6-pin cable that combines to one 8-pin connection.

I’d suspect that you’re currently underpowering the video card.

If it has two 8-pin connections, then I’d say you’re out of luck.

If power isn’t you’re problem, and your original Mac video card doesn’t require power leads, then I’d boot with both cards installed. And with a monitor on both cards.

Then I’d make sure you had proper drivers downloaded and installed and that your new card is detected. Once you have video on that new card through it’s monitor, then try booting with only the new card installed.
[doublepost=1526889664][/doublepost]Also, a quick search turned up this link on the power cable theory.

https://forums.macrumors.com/thread...ro-be-used-on-a-8-pin-gpu-like-a-770.1680079/
 
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h9826790 said:
1) how you power the card?
Click to expand...

Added a one 6 pin to 8 pin PCI adapter.

h9826790 said:
2) do you use FileVault?
Click to expand...
yes.

h9826790 said:
3) the cMP still working with another GPU?
Click to expand...

yes. Runs with a ATI Radeon HD 5870 1024 MB
[doublepost=1526899215][/doublepost]
flyinmac said:
Two things I’d consider exploring.

If the card only has a single 8-pin connection on it, then I’d get a double 6-pin cable that combines to one 8-pin connection.
Click to expand...

Will try to get one of the dual cables
 
hendrik_ge said:
Added a one 6 pin to 8 pin PCI adapter.


yes.



yes. Runs with a ATI Radeon HD 5870 1024 MB
[doublepost=1526899215][/doublepost]

Will try to get one of the dual cables
Click to expand...

FileVault is the problem. You can’t use a RX580 with FileVault ON.

Single mini 6pin to 8pin is NOT good enough, but won’t cause this black screen issue. However, it can shutdown your Mac when you stress it. You should use DUAL mini 6pin to single 8pin cable.
 
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i think if possible a dual 6 pin to 8 pin is worth doing to balance the power load, you will have to daisy chain some cables ie
mac 6pin to pc 6pin (x2)
to
two pc 6 pin to 8 pin
in to GPU
 
h9826790 said:
FileVault is the problem. You can’t use a RX580 with FileVault ON.

Single mini 6pin to 8pin is NOT good enough, but won’t cause this black screen issue. However, it can shutdown your Mac when you stress it. You should use DUAL mini 6pin to single 8pin cable.
Click to expand...

okay, will try disabeling FileVault and then try again with the rx580.
Thanks for the help sofar.
 
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hendrik_ge said:
okay, will try disabeling FileVault and then try again with the rx580.
Thanks for the help sofar.
Click to expand...
You are going to need to still power it properly as others mentioned

MarkC426 said:
You can get just one cable, dual 6pin to 8pin :)
Click to expand...
To not confuse anyone you actually mean dual MINI 6pin to 8pin. Yes there are dual mini 6pin to 8pin cables that everyone on here points to but I had one hell of a time finding a source for these that were not in China. Being in USA, having to wait 7 weeks shipping time for a $10 cable was not something I wanted to do.

So as orph mentioned I got two individual mini 6pin to standard 6pin cables, and then a dual FEMALE 6pin to single 8pin MALE cable. This saved me from having to feel like eternity waiting on that single cable solution from China
 
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hope it's working now :D im hoping the rx580 will be my next gpu once there not overpriced

i had no idea there where min dual 6 pin to 8 pin :oops:
who uses them ? apart from macpros
 
crjackson2134 said:
Just out of curiosity, what causes the FileVault and RX 580 conflict.
Click to expand...
from what I understand, the filevault login comes before the MacOS video drivers are fully loaded. So on cards that don't have a Mac EFI boot screen (basically any modern card), the login screen never displays. For some reason you can't even blind-type your Filevault password (I've tried).
 
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Just do a search on ebay for 16awg dual mini 6pin to 8pin pci-e for mac pro.
I am in the UK but had to go through the US store to find it (shipped from China).
 
I have a 5,1. My MSI RX580 stops displaying today. I swapped it out with an R9-280X while waiting for the dual mini6-8pin. It was working prior with a 6-8pin. I upgraded to 10.13.5 while waiting for the cable. Got the cable, swapped the rx580 back in now I’m getting a black screen. But the R9-280X works. Any suggestions? Thank you.
 
theone29 said:
I have a 5,1. My MSI RX580 stops displaying today. I swapped it out with an R9-280X while waiting for the dual mini6-8pin. It was working prior with a 6-8pin. I upgraded to 10.13.5 while waiting for the cable. Got the cable, swapped the rx580 back in now I’m getting a black screen. But the R9-280X works. Any suggestions? Thank you.
Click to expand...

The problem shouldn't be single or dual mini pin supply.

If the RX580 draw too much on a single mini 6pin supply, the cMP should shutdown. But not kill the card.

If nothing changed (same monitor, same setting, same cable...), but the RX580 suddenly stop working. Then I suspect your card is failed.

If still has warranty, you should ask for RMA now.
 
Nothing changed. Do you think upgrading to 10.13.5 may have something to do with it? I can see the fan running on the RX580 but nothing but a black screen.
 
theone29 said:
Nothing changed. Do you think upgrading to 10.13.5 may have something to do with it? I can see the fan running on the RX580 but nothing but a black screen.
Click to expand...

There is a small chance is OS related, especially if that's not a reference card.

If it's OS released. Your RX580 should still able to boot other OS (e.g. Windows).

If you don't have Windows, you can download the ISO from MS and run the installation disc (hold "C" during boot), no need to install anything, but just let the installer activate the RX580. If you can see anything, that means the card is working.

Apart from Windows, you can also run a Linux LiveCD to verify if your RX580 is working.

Or you may even try the recovery partition (holding Command + R to boot). But this is not an very accurate method, because the OS update may also update the recovery partition, make it lost your particular RX580's support.
 
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