I've got a Poweredge R710 that currently has 32GB RAM installed via 8 x 4GB modules. I've just ordered a 32GB upgrade (2 x 16GB) from Crucial to bring the server up to 64GB in total, however no matter what configuration i put the modules in, the server just reports an invalid or non optimal configuration.
Can someone help me work out the correct configuation please?
The reason you are getting the invalid or non-optimal memory configuration is because the memory channels are not balanced. Refer to the diagram below:
That means that the memory installed in slots A1, A4 &A7 must match those in slots A2, A5 &A8 and A3, A6 &A9 on CPU1. The same logic applies to CPU2 moreover memory on Slots A1, A4 &A7 must match B1, B4 &B7 and so forth. Therefore to achieve 64 GB of memory capacity, you need 2 additional 16 GB of memory such that you will have A1, A4, B1 &B4 populated or A1, A2, B1 &B2 with 16 GB modules
You can even use the available 4 GB DIMMs for more memory such that you have:
A1 &A2 =16 GB
A4 &A5 = 4GB
B1 &B2 = 16 GB
B4 &B5 = 4GB.
Otherwise, for optimal configuration with the current DIMMs, you should have:
A1 =16 GB, A4 = 4 GB and B1 =16 GB, B4 = 4 GB which gives you total memory capacity of 40 GB
Let me know if you any additional questions.
Have almost this exact situation. I am am reading your answer properly Robert that it would be possible to use the following configuration:
A1,B1,A2,B2 = 16 GB sticks
A4,B4,A5,B5 = 4 GB sticks
A7,B7,A8,B8 = 4 GB sticks
Achieving a total of 96 GB of RAM?
Based on the memory population guidelines, that is correct! For more information see pages 129 - 134 of the Users' Guide: http://downloads.dell.com/manuals/all-products/esuprt_ser_stor_net/esuprt_poweredge/poweredge-r710_o...
What about the remaining (6) 4Gb Sticks, in this case.
Would it be OK to also add (2) of those to A7 &B7 = 4Mb each for a total of 48 Gb instead of just 40 Gb..!?
So each Channel A1, B1 would be configured: 16Gb/4Gb/4Gb = 48Gb total
Then, with (2) more 16Gb sticks (and the (4) 4Gb sticks)
Channels A2, B2 would be configured to match A1, B1 for a total of 96 Gb
Is this all correct, Robert (or Dell Support) - did you neglect to mention filling slots A7 and B7 with 4Gb sticks for a reason?
This is incorrect.
I have an R710 with A1-8GB A2-8GB A3-null and get no optimal configuration warning.
If I move the configuration to A2 and A3 and leave A1 empty, I get the optimal configuration warning.
There is more to the configuration that includes A1.
I currently have 6 - 16GB chips in the server located in slots A1, A2, A3 & B1, B2, B3. I need to add either 2 or 6 more sticks of 16GB to this mix. If I do this how should I spread out the RAM for best performance.
Add 2 = A4, A7, A5, A8 & B4, B7, B5, B8 ?
Add 6 = A4, A7, A5, A8, A6, A9 & B4, B7, B5, B8, B6, B9?
Do I skip the 1,2 and 3 slots, in these configs?
Any help would be appreciated, thanks!
I am doing something similar. I am removing 8- 8GBs and wanting to add 12 - 16GB's, 1333MHz. I found this link below helpful, but I am still unsure if it lowers the speed by populating A4,5,6 and B4,5,6
I'm also upgrading memory to but using 6 16G RDIMM only and removing all older memory in a dual CPU configuration. Am I to understand from your diagram here that I should use:
3 using slots A1, A2, A3
3 using slots B1, B2, B3?
The boot up screen is giving me a suggested configuration which I tried to follow, but right now it says only 32GB is usable.
I'm also realizing that a bios upgrade may be necessary to see the 16GB RDIMM? Currently I'm at ver 6.1