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February 23rd, 2026 05:35
Dell PowerEdge T440 server: memory incompatible error
I installed 2 RAMs, each is 64 GB. After I got an error memory incompatible error, mixed dimm detected, please remove dimms and populate in a supported configuration 
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DELL-Young E
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February 25th, 2026 07:46
Hello 7star, thanks for choosing Dell and welcome to our community!
Have you checked this installation guide and see if you followed the guideline here? https://www.dell.com/support/manuals/en-us/poweredge-t440/pet440_ism_pub/system-memory-guidelines?guid=guid-c1124971-5295-4185-929f-c66445f5b01f&lang=en-us
https://www.dell.com/support/manuals/en-uk/poweredge-t440/pet440_ts_mlk_pub/memory-specifications?guid=guid-68af2030-69ea-4dcf-a4f1-92ff31c8c8e5&lang=en-us
Let us know if you have any further questions.
Respectfully,