I am getting random freeze ups on a Linux machine. Thought at first it might be the CPU overheating. It was running at 49 deg C which is a bit high, so have remounted the heat sink using Artic Silver. However whilst looking in the BIOS I noticed that the VCore was varying from around 1.77 to 1.85. the setting was on default so set it manually to 1.8 but it still fluctuates - expected really. Would like to know if this is normal or whether this giving rise to the lock ups?