  No, flexible memory is a feature that is not enabled or disabled. The memory mode will need to be in optimizer to benefit from flexible memory as all of the other memory modes enforce some type of population rules.   With flexible memory I can't say for sure. Almost anything will work with flexible memory regardless of how bad the configuration is. The configuration you just posted does not populate half of the risers. If you want to try a flexible memory configuration then populate according to my first suggestion, but in the last two risers(G and H) populate slots 1 and 2 on each riser with the 4GB DIMMs leaving slots 5 and 6 empty. That would probably be the best non-optimal configuration, but I'm not sure if it will work. We don't test or validate non-optimal configurations, so I don't have a list of them that will work. Thanks
Hi everyone, we have a PE R920 with sixteen 4Gb dimms already installed, and we want to add another twelve 16Gb memory dimms. The 4Gb dimms are single rank and the new 16Gb are double rank. Can someone help me figuring out the right order for the dimms? i attached a table so it will be easy to me suggestions, thanks in advance.
Memory populating on the PowerEdge R920