First my specs:
MB: MSI Z77A GD-65
Proc: Intel i5-3350P
GC: RX 480 8GB
RAM: 1 GSkill 8GB
PSU: Corsair CX500 80+ bronze
GC driver is up to date.
BIOS firmware is up to date.
Here is my problem: When I play Starcraft 2, after some hours, the PC shutdows and restarts immediately, it does not display a screen and I have to wait for about 15 minutes that it boots normally. I did not get the issue with other games so far. I also play COD Black Ops 3, Fifa 17, LoL, Doom, Heroes of The Storm.
I checked if the GC was overheating and SpeedFan tells me that it is not (average 80 degrees, it does not go upper than that).
I found out that when it shutdowns and that there is no screen, the graphic's card fan is not running anymore.
Today I tried OCCT, the issue appeared after 24 minutes but it rebooted normally.
I wanted to try to check it with another PC, but it failed to install the driver on it. The OS crashed when it was checking for device compatibility at the beginning of the installation.
I believe that there is an issue with this graphic card but I want to have your opinion first.
Thank you very much for your answers.