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

[hendrik_ge]

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?

 

[flyinmac]

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/

 

[h9826790]

1) how you power the card?

2) do you use FileVault?

3) the cMP still working with another GPU?

 

[hendrik_ge]

1) how you power the card?

Added a one 6 pin to 8 pin PCI adapter.

2) do you use FileVault?

yes.

3) the cMP still working with another GPU?

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

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.

Will try to get one of the dual cables

 

[h9826790]

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

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.

 

[orph]

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

 

[MarkC426]

You can get just one cable, dual 6pin to 8pin

 

[hendrik_ge]

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.

okay, will try disabeling FileVault and then try again with the rx580.
Thanks for the help sofar.

 

[skizzo]

okay, will try disabeling FileVault and then try again with the rx580.
Thanks for the help sofar.

You are going to need to still power it properly as others mentioned

You can get just one cable, dual 6pin to 8pin

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

 

[MarkC426]

I got mine from ebay (china), and had it in less than a week.

 

[orph]

hope it's working now 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
who uses them ? apart from macpros

 

[hendrik_ge]

okay, will try disabeling FileVault and then try again with the rx580.

Worked well. FileVault is disabled and rx580 works. Thanks guys!

 

[crjackson2134]

Just out of curiosity, what causes the FileVault and RX 580 conflict.

 

[tu2thepoo]

Just out of curiosity, what causes the FileVault and RX 580 conflict.

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).

 

[owbp]

Just out of curiosity, what causes the FileVault and RX 580 conflict.

It's not the just the RX580, FireVault can't be used with regular (PC) GPU.
You got to have Apple/Mac graphics for FireVault (or any flashed GPU for that matter).

Edit: @tu2thepoo beat me to it.

 

[crjackson2134]

Got it, thanks guys...

 

[hendrik_ge]

Hi Folks,
finally everythink went well. Thanks for the support.

 

[theone29]

Anyone got a link for the dual mini 6 pin to single 8 pin cable? thanks.

 

[MarkC426]

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).

 

[theone29]

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).

Thanks.

 

[theone29]

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.

 

[h9826790]

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.

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.

 

[theone29]

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.

 

[h9826790]

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.

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.

 

[crjackson2134]

I suggest Linux Live-CD for test.