Screen Flashing to black over 29hz

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   I just upgraded my board to a Fatal1ty X470 Gaming-ITX/ac with a Ryzen 2400G.  I am running Windows 10 with the newest AMD Chipset and Graphics drivers.  I am going through a Dennon X2300w to a Vizio P65-C1.  If I set  my resolution higher than 3840X2160p @ 29hz my screen will flash black for a few seconds every minute or two. I am on Bios 1.11A I have even tried reinstalling Windows.  My previous motherboard did not have issues and ASUS B350M-E and I also have an Asrock J4205-itx connected through the receiver that does 4k@60hz without issue.
Any Ideas before I ship it back to Newegg?

Edited by gwilly7 - 27 Jun 2018 at 4:21am

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gwilly7 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 10 Jan 2018 Location: United States Status: Offline Points: 21	Post Options Post Reply Quote gwilly7 Report Post Thanks(0) Quote Reply Topic: Screen Flashing to black over 29hz Posted: 27 Jun 2018 at 4:19am
	I just upgraded my board to a Fatal1ty X470 Gaming-ITX/ac with a Ryzen 2400G. I am running Windows 10 with the newest AMD Chipset and Graphics drivers. I am going through a Dennon X2300w to a Vizio P65-C1. If I set my resolution higher than 3840X2160p @ 29hz my screen will flash black for a few seconds every minute or two. I am on Bios 1.11A I have even tried reinstalling Windows. My previous motherboard did not have issues and ASUS B350M-E and I also have an Asrock J4205-itx connected through the receiver that does 4k@60hz without issue. Any Ideas before I ship it back to Newegg? Edited by gwilly7 - 27 Jun 2018 at 4:21am

kerberos_20 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 06 Dec 2017 Location: czech republic Status: Offline Points: 3687	Post Options Post Reply Quote kerberos_20 Report Post Thanks(0) Quote Reply Posted: 27 Jun 2018 at 11:01pm
	add ferrite chokes at each end of the hdmi cable https://en.wikipedia.org/wiki/Ferrite_bead Edited by kerberos_20 - 27 Jun 2018 at 11:02pm
	userbenchmark

gwilly7 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 10 Jan 2018 Location: United States Status: Offline Points: 21	Post Options Post Reply Quote gwilly7 Report Post Thanks(0) Quote Reply Posted: 27 Jun 2018 at 11:44pm
	Thanks, I will look into this. Tested a little more with Libreelec today and had no issues using 4k@60 resolution, so seems it might just be a Windows issue. I am also going to try and install Ubuntu today to see how that goes.

gwilly7 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 10 Jan 2018 Location: United States Status: Offline Points: 21	Post Options Post Reply Quote gwilly7 Report Post Thanks(0) Quote Reply Posted: 28 Jun 2018 at 2:59am
	Running Kubuntu Linux 18.04 from a USB stick for 3 hours now set at 4k@60hz with no issues. Must be some kind of windows driver issue.

gwilly7 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 10 Jan 2018 Location: United States Status: Offline Points: 21	Post Options Post Reply Quote gwilly7 Report Post Thanks(0) Quote Reply Posted: 28 Jun 2018 at 11:38pm
	So after more testing, I installed Kubuntu on my M.2 Samsung Evo 960 that Windows was on and ran into problems as well. So it seems to be a problem with the M.2 sata and the board. Seems whatever os is on the M.2 has the issue. I am emailed my results to Support.

kerberos_20 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 06 Dec 2017 Location: czech republic Status: Offline Points: 3687	Post Options Post Reply Quote kerberos_20 Report Post Thanks(0) Quote Reply Posted: 29 Jun 2018 at 10:29pm
	every electronic component makes some sort of noise (EMI) if your current cable acts as antenna, ull get issues, either get some clap-on ferrites/decent high quality cables with ferrites to reduce that noise or dont use that m2 :)
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