Question RX 480 crashes everytime when using even a small percentage of it

[UnchiuGab i]

Hi guys!
Since yesterday I can't play any games because if I launch one my gpu crashes [my 2 fans stop working and video goes black screen]

I tried using DDU to uninstall my graphics driver in safemode and then reinstall the optional/ recommended one. I tried doing a test test with OCCT using 80% of VRAM and again, it crashed[black screen]. I thought the thermal paste was the problem, it wasn't.
Sometimes when this occurs, after restart the drivers are gone. I can't open Radeon Software anymore[the option dissapears]

Do you what should i do? Is the GPU dead?

P.S: I can watch youtube videos since the CPU is used not the GPU.

Thank you.

 

[rgd1101]

full system spec? include brand and model of the psu

what do you mean youtube use cpu?

 

[UnchiuGab i]

Yea, Youtube is using CPU not GPU. If i open task manager gpu is on 0% and cpu 60-70%

Specs:
I5 10600KF
msi b560m pro-vdh
16 ram ddr4
Sursa is something from Corsair something past 500W for sure[I never opened the entire pc case] All i know is that's black
But isn't the PSU because 2 days ago it wasn't doing this <Mod Edit>
If it was the PSU, the PC would've earlier in logon screen restarted or shutdown. The output goes off[black screen] only when i start a game like League Of Legends[Not heavy], ETS2[Heavy gpu usage]