The possible way to fix this issue is the way I fix it, this helps alOt. So no more chitchat, I KNOW ITS itchy to not knowing the solution of the problem. try to reduce your frequency of your DRAM, I USE MY DUAL CHANNEL RAM STICK, my ram frequency is 1600mhz x2... When i reduce it to 1033 i guess, this really helps me and still it keeps the performance of my pc just like before and no shutdown. And also when I change it to 1033 the clock timing also changes. And now when i play COD IT DOES NOT SHUTDOWN, NOT LIKE BEFORE WHEN I PLAY COD 10 TO 15 MIN ITS SHUTS DOWN. AND SOMETIMES 5 MINS TOPS. I HOPE THIS HELPS. And also my rams sticks are kingston 4gig and patreot 4gig different manufacturer but the same hz all ddr3, just reduce the hz of it. This fix my problem.