When we overvolt, we rely on the integrity of our hardware. We assume that it is of high quality, without manufacturing defects, and that it is capable of withstanding a large overvolt without sustaining damage. Most of the time, this is the case. There are always exceptions. It is speculated that hardware which is damaged through overvolting, already contained small defects or weaknesses that were only made apparent, or made worse, when the hardware becomes strained through overclocking, and overvolting. There is no accurate way to tell if your specific piece of hardware has such flaws. Sometimes, we get unlucky. For the most part though, ‘healthy’ hardware is capable of running smoothly for years and years with a considerable overvolt in place.