DL385 G7 Server Memory Configuration?

[Fritsch James]

Hello,

I currently have three DL385 G7 Servers with 12-core AMD Opteron 6174 CPUs running with 128GB of RAM. I would like to upgrade them to 256GB of RAM.

Those servers have 24 DIMM Slots and currently 16 of them are occupied with 8GB DIMMs.

If I ask the HPE Memory Configurator Tool it says I could use this configuration:

Qty 16 of HPE Option Part # 604502-B21

HPE 8GB 2Rx4 PC3L-10600R-9 Kit

(HPE Module Part # 605313-171)

Qty 8 of HPE Option Part # 593915-B21

HPE 16GB 4Rx4 PC3-8500R-7 Kit

(HPE Module Part # 500207-171)

This looks kind of confusing to me because this configuration would be mixing Low Power DIMMs and Standard DIMMs - this cannot be a recommended config, I wonder if it would be working at all?

The Quickspecs for this server also lists these memory modules:

HPE Option Part # 627808-B21, HPE 16GB 2Rx4 PC3L-10600R-9 Kit (HPE Module Part # 628974-181)

Can those not be combined with the HPE 8GB 2Rx4 PC3L-10600R-9 Kits ? Are Quadrank DIMMs mandatory here and if so, why does HP not provide HPE 16GB 4Rx4 PC3L-10600R-9 Kits?

Second question I have on this: I don't know if the DIMMs that are currently used in my servers are Standard or Low Power DIMMs - how can I find out while the machine is up and running?

[FabioC1]

hI -  Fritsch James 

Talking about memories, do you can not mixed memory RDIM with Unbufered.

In This site there are all information about HPE memories

https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-c03720096#N10034

If do you have ILO 3 configured, in System Informartion -> Memory will see the type of memori do you have.

Other - if use windows, and have the HP tools, in insight diagnostics will list all hardware installed.

[Fritsch James]

Hi Fabio,

so you say it is not possible to mix RDIMM and UDIMM, but Low Power DIMM mixed with Standard (non Low-power) DIMM is safe to do? This may be right, but surely not a best practice, right? Also the maximum speed in this configuration would be 1066 MHz, not 1333 MHz, because the 16GB Quadrank DIMMs support 1066 only.

In ILO3 I can see that it is 8GB PC-10600R memory, but it does not tell if it is Low Power or not.

The operating system on the machines is linux, but HP Tools is also available here. Still I cannot see details of the used memory, i.e. on System Management Homepage - I only get the same information that ILO provides.