511-One or more DIMMs have been mapped out due to a memory error
511-One or more DIMMs have been mapped out due to a memory error, resulting in an unbalanced memory configuration across memory controllers. This may result in nonoptimal memory performance.
One or more DIMMs have been removed from the system memory map due to error conditions. This results in a DIMM configuration with an unbalanced memory population across the memory controllers within the processor. The BIOS will detect these conditions and warn the user of the possible performance impact.
Hewlett Packard Enterprise recommends installing DIMMs in a balanced configuration for optimum performance.
For more information, see the memory population rules on the Hewlett Packard Enterprise website (https://www.hpe.com/docs/memory-population-rules).