Monitor suddenly turns off with "no signal" if gaming

[AWT]

Hi.

I was playing a game, and suddenly the screen turned itself off mid game and reported "no signal".
I restarted the PC (as it was the only way to get the screen to switch on again), tried to launch the game again, and as soon as 3D was involved it turned off again (with no response to any button input). I then tried to run the game via the TV, but same thing happened.
So I uninstalled the driver using DDU, reinstalled the driver and then stress tested the GPU via OCCT - all tests passed without errors.
I then relaunched the game, and it seemed to work, but after a couple of minutes, the screen turned itself off again (reporting "no DP signal" as it was shutting down).
I made sure the graphics card power connectors were firmly connected, but it didn't make a difference.
Could it really be that the graphics card is already dead? I'm using an RTX 3080, so I wouldn't expect it to be at end of life this early (it's probably less than 3 years old); the TV isn't ancient either (and only used rarely), and the monitor is brand new (maybe 1 month old).
Any advice what I could do to further diagnose/solve this problem would be highly appreciated.
My full specs are in my profile bio.

Thanks in advance.

PS1: A problem I have had for a while (long before this no signal issue started) is that the computer won't switch to the DP monitor during boot, it only provides signal via HDMI until Windows is started (only once the Login screen appears does the monitor receive signal via DP).
PS2: I found this, but I'm unsure whether to use it as it doesn't mention the 3080, only the 3080Ti:
https://nvidia.custhelp.com/app/answers/detail/a_id/5233

[kingjames488]

do you have a 13/14th gen intel CPU? :S

[[☥] - CJ -]

Display driver crashing would be my guess, which can be power related.

If you manually overclocked it that could be another cause if it isnt fully stable.

[_I_]

driver crash is often weak or overrated psu

psu brand/model/age?

[kingjames488]

the driver should still recover... if it's sticking on no signal it's not just a driver crash.

[_I_]

Originally posted by kingjames488:

the driver should still recover...

not always
and that takes time to recover and re-write all data to the gpus vram
which can cause the game to crash, and if the psu is weak, it might even crash again while it was trying to recover

[kingjames488]

Originally posted by _I_:

Originally posted by kingjames488:

the driver should still recover...

not always
and that takes time to recover and re-write all data to the gpus vram
which can cause the game to crash, and if the psu is weak, it might even crash again while it was trying to recover

the game crashing doesn't produce a "no signal" though, it would be a black screen.

the driver crashing can produce a "no signal" temporarily... then the driver would try to re-initialize... then if it failed the default windows driver would take over and if that doesn't work your hardware is buggered like 99.9999% of the time.

like if you have onboard graphics and your GPU fails the system will still try to re-route the onboard graphics through the grapchics card... if there's no output the card isn't even capable of passing an output or the system isn't capable of producing it.

[Meatflaps]

This is probably just a defective display cable. Replace your cable and it might go away.

[AWT]

Thanks for all the advice.
My CPU is the Ryzen 5700X3D.
I will try replacing the display cable. Nvidia support told me to activate Debug Mode in Nvidia Control Panel, that seems to have somewhat mitigated the problem (but it's inconsistent - Sunday I could play RDR2 and AC Mirage without issues for hours, yesterday it suddenly crashed after just about 10 minutes of playing Medal of Honor (2010).
I noticed the GPU only uses up to 330W in OCCT stress test, it used to use up to 370W (but stress test still usually completes without errors).

[skOsH♥]

Pop out that cmos battery and pop it back in, especially if you have a new one and you should be good to go

Or at least it will allow you to go to your previous settings

[_I_]

Originally posted by skOsH:

Pop out that cmos battery and pop it back in, especially if you have a new one and you should be good to go

Or at least it will allow you to go to your previous settings

no
boot to bios and use bios option to reset to defaults

[skOsH♥]

Originally posted by _I_:

Originally posted by skOsH:

Pop out that cmos battery and pop it back in, especially if you have a new one and you should be good to go

Or at least it will allow you to go to your previous settings

no
boot to bios and use bios option to reset to defaults

Oh I suppose, typically cmos needs to be removed in my experience with brand new hardware

Edit: and I misread the post heh

[_I_]

Originally posted by skOsH:

Originally posted by _I_:

no
boot to bios and use bios option to reset to defaults

Oh I suppose, typically cmos needs to be removed in my experience with brand new hardware

Edit: and I misread the post heh

if it does not boot at all, use the jumper
i have only seen a few boards that do not have jumper to reset bios, and need to remove the cmos battery and all power for a few minutes to reset

if it can boot to bios, there is always an option to reset to default, many newer boards can save bios profiles

swapping, adding or moving ram should reset ram settings to defaults
swapping or removing+replacing cpu should also reset all oc and cpu settings to defaults too
boards have been doing that since around socket 7

before that most had jumpers to do everything, cpu multi, fsb, voltage for cpu/ram

[andreasaspenberg575]

i have encountered this problem before. how i solved it was that i installed drivers for my monitor. at least one time. the other time i had to replace the monitor, as it was too old for my gpu. my compaq monitor from the 90s simply could not handle my modern gpu in direct 3d games. it worked in opengl games however. in your case however i would install drivers for your monitor.

[_I_]

Originally posted by andreasaspenberg575:

i have encountered this problem before. how i solved it was that i installed drivers for my monitor. at least one time. the other time i had to replace the monitor, as it was too old for my gpu. my compaq monitor from the 90s simply could not handle my modern gpu in direct 3d games. it worked in opengl games however. in your case however i would install drivers for your monitor.

this makes no sense

you can use vga monitor with active digital to analog adapters

monitors do not need drivers period
only the gpu needs drivers to correctly see the display
the display tells the gpu what resolutions the display supports, using edid, ever since vga

[Meatflaps]

Originally posted by andreasaspenberg575:

i have encountered this problem before. how i solved it was that i installed drivers for my monitor. at least one time. the other time i had to replace the monitor, as it was too old for my gpu. my compaq monitor from the 90s simply could not handle my modern gpu in direct 3d games. it worked in opengl games however. in your case however i would install drivers for your monitor.

Monitors don't have drivers anymore in modern operating systems like Windows 7, 10, and 11. That's old Windows9x stuff.