Overheating issues

[ThePigKing]

I've been having some overheating issues lately. Initially it was only during gaming, but it's begun to overheat even during casual use. It started when I replaced the Intel stock cooler due to noise issues, but stopped after I moved to a case with more fans and better airflow. Now it has started happening again, and adding more fans and switching back to the stock cooler haven't helped. I've been monitoring the CPU temperature, and it hasn't gotten anywhere near the maximum. After overheating, it won't start up again until it's been unplugged for half an hour. The motherboard is a Gigabyte H55N-USB3, and the CPU is an Intel i3-540. Is there anything else I can do to prevent the overheating, and if not, what should I replace?

 

[eshepard]

It almost sounds like the contact between your coolers and the chip have degraded over time. Maybe the mounting brackets are loosening some how? Does everything look like its attached nice and snug?

 

[ThePigKing]

It almost sounds like the contact between your coolers and the chip have degraded over time. Maybe the mounting brackets are loosening some how? Does everything look like its attached nice and snug?

I switched coolers somewhat recently, and it feels relatively snug.