"If you have any sort of system stability issues, starting with the memory is generally a good bet. It is often people skip testing system memory for defects or the root cause of a system crash because it is often seen as an unnecessary computer component. In reality, it is one of the most important hardware components in any computer. If your system memory is failing, it can account for random lockups, failed POST screens, and an assortment of strange computer issues."



Link: OCC