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Asus R9 390 dual monitor enabled

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Joined
Feb 9, 2012
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306
Motherboard
Gigabyte X299 Desgnare EX
CPU
i9-9900x
Graphics
W5700
Mac
  1. iMac
  2. MacBook Pro
Mobile Phone
  1. iOS
Hi,

I just find out how enable two monitors with a R9 390 graphic card.

I am using El Capitan.

However, this is not perfect method like on a real mac or windows system PC.

I am writing this for gathering more information to work with this graphic card fully in my mac.

Look at my screenshot.

I used a monitor and it has working with any problem except sleep/awake(I don't care since I don't use sleep mode)

Recently, I found an old monitor which has DVI port only. I hope enabling all two monitors with my GPU.

----

I am not expert or tech savvy so please don't expect detail.

----

Step1. Bios setting

Actually, there is two way to use your two monitor. Using IGPU on, or Off.

Difference btw those:

if you use IGPU as primary, one monitor is using intel GPU, the other one will use R9 390.
if you use PCI GPU primary, you will get both monitor with R9 390.

I prefer second way.

So, in Bios set your primary GPU- R9 390 slot.



Step2. Turn off computer and connect cable like below:

I have 3 cables used for this.

From first main monitor, a HDMI goes to Intel GPU(connect) -First Cable
From second monitor, a DVI cable goes to R9 390.(connect) -Second Cable
From first main monitor, the other HDMI goes to R9 390(but don't connect it now.) -Third cable

Step3. Turn on your computer.

You will see second monitor show booting progress.


Step4. Connect third cable(HDMI) to your R9 390 when you see login window.

Now turn on your third HDMI connection in your main monitor by switching input.


Now, you will see two monitors enabled.


I don't know exact logic of this but at least I can use two monitors fully supported by my GPU.

If you reboot it, you should unplug secondary HDMI from R9 390 and all step is the same.

There should have many possibilities to enable dual monitors with different cables and proper monitors.

Please report it when you find your own way with your hardware settings.

Thank you!!



P.S, Please understand my poor English.

And I wish I want to try with other cables like DP or another HDMI.

Weird thing is only when I connect DVI first and then HDMI will turn on. If I use HDMI first connect to my R9 390 and connect DVI, then both will turn off. I guess there is port number which decided primary and secondary. But I can't figure it out now since I don't have proper secondary monitor which has DP or HDMI. So please anyone just test it if you have proper monitor and cables.
 

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Joined
Dec 4, 2015
Messages
167
Motherboard
Gigabyte GA Z170X Gaming 5
CPU
i7 6700K
Graphics
GTX 980 Ti
Mac
  1. MacBook Pro
Mobile Phone
  1. iOS
Hi,

I just find out how enable two monitors with a R9 390 graphic card.

I am using El Capitan.

However, this is not perfect method like on a real mac or windows system PC.

I am writing this for gathering more information to work with this graphic card fully in my mac.

Look at my screenshot.

I used a monitor and it has working with any problem except sleep/awake(I don't care since I don't use sleep mode)

Recently, I found an old monitor which has DVI port only. I hope enabling all two monitors with my GPU.

----

I am not expert or tech savvy so please don't expect detail.

----

Step1. Bios setting

Actually, there is two way to use your two monitor. Using IGPU on, or Off.

Difference btw those:

if you use IGPU as primary, one monitor is using intel GPU, the other one will use R9 390.
if you use PCI GPU primary, you will get both monitor with R9 390.

I prefer second way.

So, in Bios set your primary GPU- R9 390 slot.



Step2. Turn off computer and connect cable like below:

I have 3 cables used for this.

From first main monitor, a HDMI goes to Intel GPU(connect) -First Cable
From second monitor, a DVI cable goes to R9 390.(connect) -Second Cable
From first main monitor, the other HDMI goes to R9 390(but don't connect it now.) -Third cable

Step3. Turn on your computer.

You will see second monitor show booting progress.


Step4. Connect third cable(HDMI) to your R9 390 when you see login window.

Now turn on your third HDMI connection in your main monitor by switching input.


Now, you will see two monitors enabled.


I don't know exact logic of this but at least I can use two monitors fully supported by my GPU.

If you reboot it, you should unplug secondary HDMI from R9 390 and all step is the same.

There should have many possibilities to enable dual monitors with different cables and proper monitors.

Please report it when you find your own way with your hardware settings.

Thank you!!



P.S, Please understand my poor English.

And I wish I want to try with other cables like DP or another HDMI.

Weird thing is only when I connect DVI first and then HDMI will turn on. If I use HDMI first connect to my R9 390 and connect DVI, then both will turn off. I guess there is port number which decided primary and secondary. But I can't figure it out now since I don't have proper secondary monitor which has DP or HDMI. So please anyone just test it if you have proper monitor and cables.
I have R9 390X and have no issues with both my displays plugged in to the card from boot - I don't need to do any unplugging/hotplugging.
 
Joined
Feb 9, 2012
Messages
306
Motherboard
Gigabyte X299 Desgnare EX
CPU
i9-9900x
Graphics
W5700
Mac
  1. iMac
  2. MacBook Pro
Mobile Phone
  1. iOS
Hi, PaladineUK

Wow, good to know.

What cables you are using for both monitor working?

And Elcapitan? or Sierra?

Joe.
 
Joined
Dec 4, 2015
Messages
167
Motherboard
Gigabyte GA Z170X Gaming 5
CPU
i7 6700K
Graphics
GTX 980 Ti
Mac
  1. MacBook Pro
Mobile Phone
  1. iOS
Hi, PaladineUK

Wow, good to know.

What cables you are using for both monitor working?

And Elcapitan? or Sierra?

Joe.

Using Display Port for my 4k display and HDMI for my 1080p Display and running El Capitan. I think I have iGPU set as primary in the BIOS but neither monitors are plugged into the onboard graphics - both are plugged in to the R9 390X (although I would have to reboot to confirm that - so next time I do I will edit this reply with the info).
 
Joined
Feb 9, 2012
Messages
306
Motherboard
Gigabyte X299 Desgnare EX
CPU
i9-9900x
Graphics
W5700
Mac
  1. iMac
  2. MacBook Pro
Mobile Phone
  1. iOS
Using Display Port for my 4k display and HDMI for my 1080p Display and running El Capitan. I think I have iGPU set as primary in the BIOS but neither monitors are plugged into the onboard graphics - both are plugged in to the R9 390X (although I would have to reboot to confirm that - so next time I do I will edit this reply with the info).


Well, if I use iGPU as primary, it shows me 3 display in my mac. But two display(Primary display) connected into intel based gpu, only one display(secondary) connected into R9 390. I have only two monitors, Primary connected two HDMI, one for Intel and one for Radeon. Secondary connected DVI goes Radeon.

I guess I should have DP cable and test it later.

If you could provide, please show me your FB, ID and any other setting in clover profile. And Bios setting.

Thank you!!
 
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