I remember when I built my last gaming PC I unknowingly ran a version of Prime95 that could not pass an OC stress test on certain Intel processors.
The combination of instructions it used meant that even if, under sustained 100% CPU load with a normal benchmark, your cooling solution was sufficient, within 30 seconds the CPU would hit 100° and activate it's thermal protection before a shutdown.
I went through 3 water cooling setups and numerous thermal paste reapplications before I realized, since I was driving the CPU hard (4690k at 4.9Ghz with a high overvoltage I recall being considered at the limit for non-LN2 setups, 1.4?) and thought that cooling was the issue
The combination of instructions it used meant that even if, under sustained 100% CPU load with a normal benchmark, your cooling solution was sufficient, within 30 seconds the CPU would hit 100° and activate it's thermal protection before a shutdown.
I went through 3 water cooling setups and numerous thermal paste reapplications before I realized, since I was driving the CPU hard (4690k at 4.9Ghz with a high overvoltage I recall being considered at the limit for non-LN2 setups, 1.4?) and thought that cooling was the issue