Question GPU suddenly dont show any display and fans spins at max speed?

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Spectatroll

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Jul 24, 2016
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My spec is:
  • i9-9900k
  • Evga rtx 2080s XC ultra OC
  • Aorus 240 liquid cooler
  • Aorus elite z390 mobo
  • Antec NE600G PSU
  • Corsair vengeance pro 16GB running at 3200xmp
The pc runs everything at stock except for the RAM
pc always worked fine until last night i was playing game and then suddenly the GPU didnt show any display at all and i restart the PC and now its just the fan spinning really fast and no lights coming out from the GPU like its suppose to when it was working(when i was troubleshooting this at one point i forgot to plug in the power for GPU and its the same, the fan is spinning and ofc there is no light) is it the GPU failing or is it the mobo?
i cant even get into bios when i plug in the GPU because it wont show any display at all, the only way i can do that is by using the integrated graphic on the mobo by removing the gpu and switched the output to mobo.. the mobo integrated graphic works just fine and i can just go to windows
idk if it helps but the case fan rgb lighthing still stays on when i turned off the pc after the no display problem.. when it should be off when i turned it off.. and the lighthing would only die when i turn off the PSU
is it the mobo failing?, Everything else on the mobo is working fine except for the GPU

What i tried :
i checked the cables from gpu to the monitor and nothing is wrong
i did try clearing CMOS
i also tried different PSU unit (only 24 pin for mobo, 8pin for processor, and 8+6 for GPU, idk if this would work, its just that tech supports told me that by plugging those 3 in without plugging the other power like storage sata or AIO cooler should be it enough for u to see the LED for the GPU wether it works or not)and its still the same
Tried testing the PSU with digital tester and it works fine
i checked the GPU pins too and it seems to be fine

Update : i tried letting it run for about 8 minutes and now the GPU fan spins and stops every couple of seconds.

After a couple of hours the GPU store contacted me and want me to send them a video as proof and to diagnose the problem but then when i turned on the pc.. the GPU now works just fine, like theres no problem.

After 2 days its working fine the morning after that i turned the PC on it works until it finished booting into windows where the GPU led would die and start spinning at max again, the difference this time is that i just power the PC off and on and the GPU would work just fine until it finished booting into windows.

For some reason at this point it was everytime logitech G-HUB finished being loaded and the GPU would die again, so i went ahead and uninstalled logitech G-HUB and the PC just works fine for the rest of the day, until the day after where i start the PC it finished booting into windows and the GPU died, but at this point the problem is when i power it off and on the GPU would work fine for a couple of second and after that the GPU died, i also noticed the mobo warning LED indicating from CPU then DRAM for a brief second then switch to VGA the GPU died and the warning stays there, at this point i rechecked everything to see if there is any hardware affecting the GPU but i dont find any problem, i also tried turning it off and on multiple time to see if the GPU would work and the mobo warning led sometimes(like 1/7 it happens) didnt stay on VGA and it proceed to show the led on boot(which is what it was suppose to be) but the GPU still died.
 
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Spectatroll

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Jul 24, 2016
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ok so i have been thinking
since the GPU would only have problem after being shut down for a long time(2 hours or more).. i think its most likely the mobo having a bad part since if its the CPU it would always happens when i restart or shut it down then turn it on after the PC works, but no.. it works fine.. as i said
it will work fine for the rest of the day, restart, shutting it down and power it on again and there isnt any problem... it only occurs if i shut down the PC for more than like 2-5 hours and the problem will occur.
 
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Spectatroll

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Jul 24, 2016
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Ok at this point the problem is not intermittent, since the past week.. the only time the GPU would die is when the pc turned off for more than 2 hours and it will reach the booting with windows logo.. when the screen went black the gpu will die at that point.. and i need 2-4 times powering the PC off and on again for it to work