The stability of a PC is contingent on several things. Quality of components, cooling and maintenance. Unfortunately, many of us often overlook one component that is the most important of all, the power supply. If you are using a power supply that came with your case, or that you got from a bargain bin for five dollars and you have noticed system instability and random reboots, there should be alarm bells going off. Not only can a low-quality power supply cause instability, it can cause damage to components over time, namely hard drives, which can be killed by a severe voltage spike.
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