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