Question Monitor in DisplayPort periodically looses input ?

[bebeunit]

I have two displays, one plugged into the HDMI port and the other plugged into the first display port. The display plugged into the HDMI port never looses input and is always fine. But periodically, the one plugged into the display port loses input. This seems to happen when the graphics refresh, such as when opening or closing a full screen program, or opening the NVIDIA gforce experience app. These same actions that cause the monitor to lose input will also restore it. For example:

I'm playing a game, and when the match ends the fullscreen client closes. I lose input on my secondary monitor. So I open the NVIDIA gforce experience app (sometimes I need to open and close it a few times), and the displays refresh and second monitor comes back.

This issue has been going on for months and persisted in exactly the same fashion after upgrading my GPU and PSU. Here is the full list of troubleshooting I have tried:

- Updating my NVIDIA drivers (I am fastidious about updating drivers)
- Swapping which monitor is plugged into which port
- Purchasing new video cables
- Changing which monitor is the primary display
- Replacing my GPU and PSU
- Plugging both monitors into display ports (Only the first display port seems to work at all, all the other display ports give no output. Note that the GPU is brand new!)

And finally, here are my PC specs:

Processor: AMD Ryzen 5 2600 Six-Core Processor 3.40 GHz
RAM: Corsair Vengeance LPX 2 X 16GB 3200MHz DDR4
GPU: NVIDIA GeForce RTX 4060 Ti (Previously, when the problem began, a1660 Ti)
PSU: Corsair CX650M (Previously a Kratos something or other, I forget and didn't save it)
Monitors: 2 x ASUS VG245, identical and both purchased at the same time.

 

[Lutfij]

Updating my NVIDIA drivers (I am fastidious about updating drivers)
Can you elaborate on this? Did you use DDU?

PSU: Corsair CX650M (Previously a Kratos something or other, I forget and didn't save it)
Is this your unit
https://www.corsair.com/us/en/p/psu...lus-bronze-semi-modular-atx-psu-cp-9020221-na
?

You forgot to mention the make and model of your motherboard. Please mention the BIOS for the motherboard as well.

 

[bebeunit]

Updating my NVIDIA drivers (I am fastidious about updating drivers)
Can you elaborate on this? Did you use DDU?

PSU: Corsair CX650M (Previously a Kratos something or other, I forget and didn't save it)
Is this your unit
https://www.corsair.com/us/en/p/psu...lus-bronze-semi-modular-atx-psu-cp-9020221-na
?

You forgot to mention the make and model of your motherboard. Please mention the BIOS for the motherboard as well.

When I say I'm fastidious with drivers, I mean I'm constantly checking for updates with my NVIDIA software. Apparently that's not quite fastidious enough! Because though I did not run DDU previously (didn't know that was even a thing!), I've now read quite a few threads on this forum about issues with dual monitors that recommend it. So I gave it a try, and so far it seems to have solved the issue. No issues all evening!

But for the sake of being complete:

Yes, that is my PSU.

Mobo is ASRock A320M-HDV R40.0
BIOS is American Megatrends Inc P3.70 11/13/2019

Both of these came with the prebuilt, I don't know jack about motherboards or how to update the bios.