Today I had the problem where after adding new memory to one of our Dell 6950 servers even though we followed the correct steps of putting the new 8GB memory cards in as pairs after booting the server the server showed 82GB instead of the installed 96GB.
We had 4GB cards in already and if I checked under Hardware Status via Virtual Centre (due this machine being an ESX host) it showed all the DIMMs correctly and added up correctly. I searched all over the web for an answer but only when I rebooted the server did it give me an error that helped me source the answer to my problem. The following error showed “ Warning: The current memory configuration is not optimal.” and told me to see the owners manual as shown below.
I searched for this and came across Steve Jenkins’ posting on the exact error and the response he got from Dan Coulter, an Enterprise Expert Center Server Support Analyst at Dell. So as to direct traffic accordingly to Steve’s posting rather than posting the answer here I’ve pasted the link to his posting below
Seeing as we have more memory arriving soon to match the newly added 8GB cards I’ll just wait for the new cards to fix the problem but a big thanks to Steve and Dan for the answer to the problem.