Alienware Aurora R12
I already upgrade driver, latest Windows, turn on V-Sync. But it still happen while I'm gaming like GTA 5, PUBG, Spiderman.
You can use AWCC to monitor the temperature.
Is the processor liquid cooled, or did you order the regular air cooling?
How long did you have this system and did it do this from the beginning or is this something new?
There are 2 suggestions that you can try. Firstly, you might need to replace your ram, because it connects to the CPU, and especially while gaming, it could have an error due to mass amounts of ram being used. Secondly is replacing the PSU, but that step is only necessary if the PSU has a low wattage, your PC uses more wattage while gaming, and if your PSU is unable to deliver that, it might end up shutting down.