When playing some games for a good length of time of around 45mins, I start to hear a static sound come through the speakers that gets louder and louder, so I loud I have to turn the speakers off. If I don't quit the game quickly at that point the game and PC will crash and even reset. I've been monitoring my CPU temps and noticed this occurs when my CPU hits 65c with core temp but when stress testing with linpack it can go as high as 70c and not crash the system, with games its more sensitive. I've noticed over the years the CPU temps have got higher, I used to run the CPU at 3.5ghz with slightly increased vcore and had no problems then lowered to 3ghz and stock voltage when it would run too hot, now I'm at stock 2.5ghz and I'm having problems. It seems to be the latest more demanding games make it happen much faster as the CPU gets hotter faster, with older games the CPU would never reach 60c, even Crysis it wouldn't go as high as 65c and never crash. Not sure what else I can do? even with the CPU fan on max it still will hit 65c, maybe overclocking has taken its toll. All fans are working and there's no excessive dust build up. The other possibility is the GFX card but its never been clocked and doesn't get that hot. Can anyone recommend a free GPU temp monitoring program that I can have running games? Just to rule it out.