I overclocked mine from 3.5ghz to 4 ghz. It is smooth BUT when I am using intel burn test and prime95, my pc crashes. So, I downgraded mine to 3.9 ghz and the tests doesn't fail. Why does it fail when it is in 4ghz? Also, temperatures aren't the issue since I have a liquid cooling installed, bascially 40celcius is the max peak of my temperature even when the intel burn test is open. We have the same processor and motherboard in this video (https://www.youtube.com/watch?v=zPpKfx7g3c4) but he successfully did it without problems. Do you think that my power supply is the culprit here? Also, do you think I should stay at 4ghz and just ignore the warning that prime95 and Intelburntest gave me? Thanks in advance!