[ErikG]

Today I got an answer by Gigabyte, not quite the answer I had hoped for: 

Dear  Erik ,
AMD Radeon R9 390 only can reach 4K@30Hz due to HDMI version 1.4a.
Only HDMI 2.0 can reach 4K@60HZ via HDMI port. On the other hand, the display devices should be support HDMI 2.0 as well.

I emailed them back:
Dear GIGABYTE-Team,
Perhaps I was unclear in my formulation, but I am quite sure you missed my point unfortunately. I will retry:

I was and am aware of the technicical limitations of HDMI 1.4a which is located on my R390 card (this is 4k 30Hz). So far so good.
I am also aware HDMI 2.0 is needed for 4k 60Hz.

This is exactly the reason I bought a CLUB3D CAC-1070 adapter (please familiarise yourself with this adapter before continuing: http://www.club-3d.com/index.php/products/reader.en/product/displayport-12-to-hdmi-20-uhd-active-adapter.html).

It converts the Displayport 1.2 output to a HDMI 2.0 output.

My device chain setup is as follows:
Computer>Gigabyte AMD R390 > displayport 1.2 > CAC-1070 > HDMI 2.0 > HDMI 2.0 cable > HDMI 2.0 input on UHD TV Samsung JU6650.

Superfluously, I have not connected to the HDMI1.4a port, but to the Displayport.

Within this device chain I have exchanged all devices in order to isolate the problem:

• I downgraded to 8bit color depth
• I have tried a different HDMI 2.0 cables
• Then I tried different drivers (catalyst to crimson 16.5.1)
• I tested with all configurations on my Monitor (UHD Color ON, source input etc)
• I reïnstalled windows
• I updated the firmware of Motherboard
• I updated the firmware of GPU
•  I brought the CAC-1070 adapter and my cables to a store where I tested with an identical SamsungJU6650 Monitor and a gaming laptop with displayport 1.2 (this was succesful and rules out the problem is in the cable or CAC-1070 adapter)
• I brought over a friend’s computer with a R290. I connected his PC to my TV via Displayport 1.2 > CAC 1070 > HDMI 2.0 > Cable > Samsung and it worked at 4k60Hz. Note: this confirms that my display device support HDMI 2.0 as you mentioned.
• Next, I placed his R290 in my computer/motherboard. I attached the CAC-1070 to the displayport 1.2 of the R290 and the adapter’s HDMI 2.0 output provided 4k60Hz. This rules out that the rest of my setup or OS is the problem.
• Next I placed my Gigabyte’s R390 in his system and connected the screen in the same way (DP1.2>CAC-1070>HDMI2.0>Cable>Samsung. This did not work.

This leads me to the conclusion it cannot be another device than the Gigabyte R390.

• I have seen my television work,
• I have seen my cable work,
• I have seen the CAC-1070 adapter work
• … R390
• I have seen my system work (be it with an other GPU). 
• The only time it does not work is in combination with the Gigabyte R390.

Please advice on how to proceed or what support I can count on from Gigabyte. Can you recreate/recognise the problem? If so can you provide firmware update if it is software related or exchange my GPU for an identical one to rule out hardware related issues?

I hope I have more clearly described the issue at hand.
I am looking forward to a workable answer.

Regards,

Erik Guldenaar

ps. please attend to the thread on the CLUB3d forum where I have posted pictures of the tests I described here.

[ErikG]

I have just received an e-mail that Gigabyte is checking with the responsible team.

[ErikG]

Today I emailed Gigabyte on the matter:

Dear Gigabyte: 

I have purchased the Club3d CAC-1070 Displayport1.2 to HDMI 2.0 active adapter. This device should enable the Gigabyte R390 to output 4k@60Hz to my Samsung 4k television over HDMI. However, the framerate is capped at 30 Hz.

I have tested extensively with different:
– drivers
– cables
– OS
– GPU Firmware
– Motherboard Firmware
– Other GPUs (R290) and Laptop
– Other configurations entirely

Be advised, I have seen my TV, Cable and CAC-1070 adapter work in combination with an other GPU. Therefore I will have to conclude the problem is isolated to my Gigabyte GPU.

Please attend to this thread I started on the club3d forums for further information and photographs:

https://insights.club-3d.com/thread/the-cac-1070-amd-r390-samsung-ju6650-windows-10-64x-challenge/

My username on that forum is ErikG.

I hope to hear soon on any advice or solution you offer to my case.

Regards,

Erik

[ErikG]

Can you indicate your version of the firmware? is it 0x07 0x23?

[ErikG]

Great to hear that it is not just me.
Also I am glad it is not the CAC-1070 adapter or Samsung screen.
Any help from Club3d from this point forward is highly appreciated though.

First of all, Labatomi, do you confirm you have the exact same GPU as I do? I have the AMD R390 Gigabyte GV-R939G1 GAMING-8GD.
Also, can you provide your driverversion and motherboard?
My motherboard version is H170M-A Pro (MS-7972)

As for the Tips of MST1407, I have done the following:

1. Upgrade firmware GPU to newest version (F91):
Source: http://www.gigabyte.com/products/product-page.aspx?pid=5500&dl=1#bios 
Old
[img]http://insights.club-3d.com/wp-content/uploads/2016/04/back-up-versie.png[/img]

New
[img]http://insights.club-3d.com/wp-content/uploads/2016/04/nieuwe-geflashte-versie.png[/img]

2. GPU scaling is off
[img]http://insights.club-3d.com/wp-content/uploads/2016/04/Scaling-off.png[/img]

3. Updating Bios
Download from: 
<a href="https://www.msi.com/Motherboard/support/H170M-A-PRO.html#support_download”>https://www.msi.com/Motherboard/support/H170M-A-PRO.html#support_download version B3

Old Bios:
[img]http://insights.club-3d.com/wp-content/uploads/2016/04/bios-oud.jpg[/img]
Flashing
[img]http://insights.club-3d.com/wp-content/uploads/2016/04/updating.jpg[/img]
New bios:
[img]http://insights.club-3d.com/wp-content/uploads/2016/04/bios-new.jpg[/img]

Thusfar no solution yet.
Two things still yo try:
1. CSM (I cannot find this within my updated bios, can you advice where it should be located?

2.Remove Intel graphics software
Can you advise on which steps to take here?

Regards,

Erik

[ErikG]

Edit: 15.11 should be 15.12

[ErikG]

Last week my brother in law came over with his PC (windows 7 x64, 15.11 drivers) which contains a Sapphire R290.

His system, his GPU
When we started his Windows 7 system, the CAC-1070 worked instanteneously at 4k60p:
[img]http://insights.club-3d.com/wp-content/uploads/2016/04/2.-Windows-7-1.jpg[/img]
This picture is his system with 15.11 drivers in Windows 7

To my understanding this rules out the possibility that my Samsung screen is the culprit.

Swap
Next, we decided to swap the videocards:

• My R390 into his Windows 7 system (15.11 drivers)
• His R290 into my Windows 10 system (16.4.1 drivers)

[img]http://insights.club-3d.com/wp-content/uploads/2016/04/1.-2016-04-10-12.29.46-1.jpg[/img]
Left his system with my AMD R390 Gigabyte GV-R939G1 GAMING-8GD
Right my system with his Sapphire R290

My system, his GPU
We started up my system with the R290 which resulted in success:
[img]http://insights.club-3d.com/wp-content/uploads/2016/04/3.-windows-10.jpg[/img]
This picture is my system with a R290 with 16.4.1 drivers in Windows 10.
To my understanding this rules out the possibility that Windows 10 is the issue in my case.

His system, my GPU
Next we were very curious of course wether or not my R390 would work in his system.
Alas, when we fired up the R390 in my brother in law’s system, the video-output was capped at 4K@30Hz.

Findings
To me it seems it must be my AMD R390 Gigabyte GV-R939G1 GAMING-8GD.
However I am still not quite sure it is hardware or software related. 
Could it be that the 8GB of VRAM plays a part in this?

I am looking forward to your advice.

Regards,

Erik

 

[ErikG]

This is Erik, trying to make my CAC-1070 work with SAMSUNG JU6650 and AMD R390

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