Hello. Your memory configuration is invalid because the memory channel  CH0, is not balanced with channels CH1 & CH2. Refer to the diagrammatic illustration below: [IMAGE] In order to balance the memory on these channels, we should have memory DIMMs in:                                    A1, A2 &A3 = B1, B2 &B3 moreover also A4, A5 &A6 = B4, B5 &B6. Hence the memory modules on CH0, CH1 &CH2 have to be identical for optimal memory configuration and performance. Depending on how much memory upgrade you are looking to have, you may buy 1 more 16GB DIMM and then populate on slots A1&B1 to provide total capacity of 32GB. This will offer more flexibility for future memory upgrade Let me know whether you have any further questions.
I just bought Dell 16 GB Certified Replacement Memory Module for Select Dell Systems - 2Rx4 RDIMM 1333MHz LV.  Currently, I have 8GB of RAM (1GB on each slots). After I installed this new memory and reboot the server, it shows invalid memory configuration. So, I changed the memory setting in the BIOS from "Advanced ECC" to "Optimize Memory". But, It's still only detecting my current speed of memory which is 8GB. Is there anything wrong with the memory configuration? I've tried to re-seated the new RAM. Please help. Thanks.
Dell PowerEdge T610 (Memory Upgrade)