Multibit error encountered on Dell Server Memory

The event message reference for this was 1404. It indicates a faulty DIMM that should be replaced but from what I read on blogs, the alert often clears and does not come back after reboots. Since it only tripped once for me, I cleared the memory errors using OMSA (dcicfg32.exe) and so far so good.

Cause of error according to Dell: "A memory device correction rate exceeded an acceptable value, a memory spare bank was activated, or a multibit ECC error occurred. The system continues to function normally (except for a multibit error). Replace the memory module identified in the message during the system's next scheduled maintenance. The memory device status and location are provided."

Try replacing the DIMM with an identical one. If you have the memory under warranty then go for a replacement from the same vendor.