Since I am very stable at my problem evaluations, I am putting the blame back to cpu overheating. I put back the 6970 and it shutdown again with it. I downloaded Hot CPU tester and before the first test got to 50 % it shutdown again just like in-game and when I booted in seconds after the cpu temp was at 65 (I am guessing it must have hit more than 90 during the test). Also run windows memory diagnostics test with no problem there. I have this CPU for like 6 months and it started the shutdowns in the last three and mostly the last 2 months. I guess getting an aftermarket cooler is the only option now. I knew the stock cooler sucked but I thought it would last longer considering I never overclocked the cpu.