Computer randomly shutting off, cooling issue?

sumpsychochic

Honorable
Dec 13, 2012
8
0
10,510
Okay, my computer recently started shutting off while in the middle of playing Ragnarok 2, which I have been playing fine for almost a year now.
Someone suggested it might be an overheating issue, so I downloaded CoreTemp, but because I have no idea what it used to be running nor what correct temps are, I need some help to know if that is the issue or not.

Tj. Max is showing 70C
It's running around 53-55 C idle and around 68-70 C when I pull up a game, so I'm guessing that is the issue, but just want to check what temperature I should be aiming for.

AMD Phenom II X2 560 Processor 3.30 GHz
4.00 GB RAM
ATI Radeon HD 5670
Windows 7 Ultimate