Thanks Ubrales for the tip, I sure will read them.
Also I am happy to announce that my problem is solved !!!
. I switched my GPU and I have been playing Tera since yesterday and no reboots! So I guess there was something wrong with my other one, oddly enough.
Anyway, thank you Ubrales for your advice on my anxiety issues. And thank you Gman450 for helping me with this!
Best forum for technical assistance!