I've recently updated to Red Hat Enterprise Linux 4.5 and I see the error message "EDAC k8 MC0: extended error code: ECC chipkill x4 error" in /var/log/messages. What does the error mean?

Error Detection And Correction (EDAC) support for AMD Opteron CPUs was included in Red Hat Enterprise Linux 4 Update 5. The messages, found in /var/log/messages, usually means that the system has a hardware problem, although this is not always the case. Its possible that there is a hardware problem which simply wasn't known about because EDAC wasn't enabled prior to upgrading to U...