Changing Memory Speed on UCS C240 M4

[jimbe0]

Hello! I just purchased a C240 M4 second hand that has 128GB of DDR4 2400T memory installed. Both BIOS and CIMC see that the memory is 2400, but is showing that the memory is running at 2133. I can't find a place in BIOS or in CIMC on where to change that to 2400. I've been searching for documentation, but cannot find anything. Any ideas on where I can change this at?

[b.winter]

Maybe the speed is regulated to 2133 Mhz due to the CPU installed. Not all CPUs support the full speed.
See table 6 here https://www.cisco.com/c/dam/en/us/products/collateral/servers-unified-computing/ucs-c-series-rack-servers/c240m4-sff-spec-sheet.pdf

Find out which CPU you have installed and check the max. DIMM speed accordingly in table 6.

[Nithin Eluvathingal]

Make a note of this too.. When you mix 2400 MHz RDIMMs of different sizes (for example, 4x32GB + 4x16GB), the memory speed clocks
one step down to 2133 MHz.

2.12.0.0

[b.winter]

@jimbe0 Any update here?

[Roger Kallberg]

I moved your post over to the UCS part of the community as it is not related to Collaboration.