Error Correcting Code (ECC memory) is used in most computers where data corruption cannot be tolerated under any circumstances.

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What is ECC ram and why is it better?

I've seen a dicussion about ECC ram use on servers. Why is it better?
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4answers
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ECC chipkill errors: which DIMM?

We often get DIMMs in our servers going bad with the following errors in syslog: May 7 09:15:31 nolcgi303 kernel: EDAC k8 MC0: general bus error: participating processor(local node response), ...
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7answers
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Would you use ECC RAM in a workstation?

Is ECC RAM recommended for use in workstations, or is it something that only gets used in servers? If non-ECC RAM works in PCs, why would we need ECC RAM at all?
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1answer
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How seriously should I take ECC correctable error warnings?

I have a pile of Sun X2200-M2 servers. These servers have ECC memory. In some of these servers, I am getting warnings in the eLOM about "correctable ECC errors detected", eg: # ssh regress11 ...