Originally posted by brosis
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System RAM is the weakest link.
Another point to consider on "is it worth it" is your usage pattern. If you reboot daily, or multiple times per week (like Microsoft OS's tend to do) then the error probability is reduced, since memory is wiped at power off or reboot. If you keep your system running 24/7 and rarely reboot, as many (most?) Linux desktop users tend to do, then it becomes more of an issue, since a potential memory error remains resident for an extended period of time.
Obviously in a server (non-Microsoft) scenario, where the OS may be up and running for months or even years at a time between reboots, the probability of a memory error is quite high, which explains why ECC memory is the defacto standard in every server, regardless of vendor.
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