Screen flickering. What is causing?

[phongle123]

 

I just got a 4k Monitor yesterday and it seems like it's happening because of incompatibility issues or something.

 

Specs: Windows 10, GTX 1070, Dell P2817Q

 

I was using a 1080p monitor before and nothing happened.

Some problems, like that 1 showed in the video. Playing Overwatch causes it to have green tint, red tint, dark screen, and a crash that says "the rendering device has been lost". Even opening up some games will not launch past a black screen and when I click it on it says it is not responding and it won't ever launch until I go to NVIDIA EXPERIENCE and change the game settings from there.

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Is this an affect of the Monitor, the GPU, or Windows 10, or because of the Native UHD resolution? Because the only thing that changed was the Native resolution from 1080p to UHD. I have played those games before with the 1080p monitor using the UHD resolution just to test if I could get 60FPS with it and I never experienced anything I listed above.

[The Sloth]

gpu issue

[NTDaws]

GPU issue.

[phongle123]

Usually how does a problem like this happen? Is it affected by a certain part of the GPU like a VRM overheating, damaged, or permanently damaged component? I have also started hearing it coil whine a few days ago.

[phongle123]

After some fiddling around I came to another culprit.

 

The whole situation,

1) Screen Flickered on DP

2) I changed monitor input to HDMI

3) Screen stopped Flickering

4) I unplugged DP from 1st DP on GPU and plugged into 2nd DP on GPU

5) Changed input to DP

6) Flickering is still gone

7) I unplugged DP from 2nd DP on GPU and plugged into 1st DP on GPU

8) Flickering is still gone

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Therefore culprits,

1) GPU is still the problem?

2) DP cable is the Problem?

3) Could the 1st DP on the GPU be the problem?

 

Additional Info:

1) Sometimes when the screen flickers and I restart the computer the flicker is still there which leads me to believe it could not be the GPU?

2) Maybe the HDMI cable was good and DP cable was bad so changing source to HDMI stopped it because the problem was coming from the DP? However, I did not change the input back to DP instead I unplugged it which may have hard resetted the problem?

 

[The Sloth]

1 hook your computer to your tv to test if the gpu is the problem.

2 hdmi was good problem solved, get a new dp cable to test it. 

[Megah3rtz]

Either the cable, monitor, or one of the ports. 

[Prysin]

i've seen that before. Back in the late 90s, we had these big fat ass monitors, CRT they were called... they had this "degauss" button on em. And if you had a bit fucked up monitor, spamming said button produced said result.

[phongle123]

Next thing I will try to see when it happens again is to change input to hdmi and if it's fine change it back to dp without unplugging the dp to check.

[kiwibacon]

i used to have this problem when using cheap 4k hdmi cables.

[phongle123]

Okay, Update. It finally started flickering again I changed the Input then I changed it back and the flicker did NOT stop. Then I unplugged the DP cable and then plugged it back into the GPU and the flickering DID stop.

 

Does that mean that this is a DP Cable problem?

 

Did not happen on 1080p monitor it seems like this Cable can do 4k but not handle it like it is supposed to?

[phongle123]

 

On 2/3/2017 at 5:14 PM, nerdslayer1 said:

1 hook your computer to your tv to test if the gpu is the problem.

2 hdmi was good problem solved, get a new dp cable to test it. 

 

On 2/3/2017 at 11:06 PM, kiwibacon said:

i used to have this problem when using cheap 4k hdmi cables.

Finally got a new DP Cable and tested it out. The flickering problems are now gone just as I and others suspected. It was a bigger gauge cable than the previous cable. This update is so if anyone happens to run across this thread, it was not a gpu problem.