My grapphics card seems to be dead

GabrielAbarca

Distinguished
Oct 12, 2016
7
0
18,510
So, while I was playing Overwatch sometimes the game crashed out of nowhere and windows would show me an "AMD display driver stopped responding and successfully restarted" message
After this I just restarted the game and everything was fine
It happened with other games sometimes too but mainly with this game
I've had this card for a couple of years and it just started happening a while ago and now the card seems to be dead

After the game crashed for the last time my screen began to change to squares and stuff like this until the whole pc just stopped.
I restarted it and it did the same thing after a few minutes without any game being oppened
I restarted again and it just doesn't work anymore
Windows first load screen is shown and after this the screen goes black and nothing works

I went to BIOS and tried to boot through a flash drive with ubuntu and it did the same thing (showed first load, than crashed)
I changed to onboard and it works perfectly. Is my card dead?

(Specs: ASRock Z87M Pro4, Intel Core I7 4770, Sapphiretech R9 270x, G-Skill 8gb RAM, Windows 10)
Sorry for my bad English

Observation: I cleaned the PC and nothing changed