topic Betreff: DL380 Gen9 RAM Upgrade Issues in ProLiant Servers (ML,DL,SL)

DL380 Gen9 RAM Upgrade Issues

LeeRH — Wed, 07 Dec 2022 04:18:53 GMT

Hi folks

Like others, I am having problems upgrading my DL380's RAM. I know there's documentation out there, but if I'm honest, I just don't understand it enough to solve my problem.

Currently I have 4 x 8GB dimms (1RX4 PC4-2133P-RC0-10) in all the white slots for both processors, and then 2 x 8GB dimms in the E+F black slots, giving us a total of 96GB over 12 dimms.

I have now bought 2 x 32GB dimms (728629-B21 - HPE 32GB (1x32GB) Dual Rank x4 DDR4-2133). I have tried adding these two dimms in the blue slot #10 on each processor, in blue slot #7 and black slot #2, but all give me misconfiguration errors.

Any ideas on where / if I can fit these dimms?

Thanks so much in advance,

Lee

Query: DL380 Gen9 RAM Upgrade Issues

support_s — Mon, 05 Dec 2022 19:44:22 GMT

System recommended content:

1. Advisory: ProLiant Gen9 Series Servers - SYSTEM ROM UPGRADE RECOMMENDED: Systems Configured with an HP 32GB 2Rx4 PC4-2133P-R Kit Should Upgrade the System ROM if a "295" POST Error Is Encountered

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Re: DL380 Gen9 RAM Upgrade Issues

msobers22 — Mon, 05 Dec 2022 21:24:08 GMT

Hello,

The Letters identify the population order. You must follow the population order when placing the DIMMs.

White DIMM slots denote the first slot of a channel. For 1 DPC (DIMM per channel) populate white slots only.
A minimum of one DIMM is required per server.
Install DIMMs only if the corresponding processor is installed.
If only one processor is installed in a two processor system, only half of the DIMM slots are available.
To maximize performance, it is recommended to balance the total memory capacity between all installed processors and to load the channels similarly whenever possible.
When two processors are installed, balance the DIMMs across the two processors.
Populate DIMMs from heaviest load (quad-rank) to lightest load (single-rank) within a channel.Heaviest load (DIMM with most ranks) within a channel goes furthest from the processor.

Document - HPE ProLiant DL380 Gen9 Server - Configuring Memory | HPE Support

Document - ProLiant DL380 Gen9 Server User Guide | HPE Support

Hopefully this helps

Betreff: DL380 Gen9 RAM Upgrade Issues

Cali — Tue, 06 Dec 2022 09:10:19 GMT

Populate in Alphabetical Order, (Black G & H).

And put the new Dual Rank in the first Slot A & B.

Cali

Betreff: DL380 Gen9 RAM Upgrade Issues

LeeRH — Tue, 06 Dec 2022 10:01:35 GMT

Hi Cali

Sorry, I don't understand your reply.. The existing DIMMS have been added across the two processors in alphabetical order:

A (white /ch1) = 8gb
B (white /ch2) = 8gb
C (white /ch3) = 8gb
D (white /ch4) = 8gb

Plus:
E (black /ch1) = 8gb
F (black /ch2) = 8gb

So at this point, I have more than 1 dimm per channel (white+black).

So are you saying I should leave the above in place but add the 32gb dimm to G on both processors? I think I tried this but it got rejected. I should say again that I only have two 32gb dimms, so could not populate G & H on both CPUs unless I purchased more RAM or only added to one CPU.

Thanks for your help,

Lee

Betreff: DL380 Gen9 RAM Upgrade Issues

Cali — Tue, 06 Dec 2022 10:23:41 GMT

OK, now it's a bit clearer.

You have to populate in Alphabetical Order.

So the next free is G

Populate DIMMs from heaviest load (quad-rank) to lightest load (single-rank) within a channel. Heaviest load (DIMM with most ranks) within a channel goes furthest from the processor.

For me, this means, that the new 32GB Dual Rank, has to be in Slot A, B, or C.
So, I would swap C with G.

Betreff: DL380 Gen9 RAM Upgrade Issues

LeeRH — Tue, 06 Dec 2022 11:23:23 GMT

Ah, ok, now I think I understand. Sometimes it takes a bit of time and explanation to understand the manual! I will do what you suggest, re-ordering the third channel to weight it differently and see if that helps. Unfortunately this is our main hypervisor machine so can't try until late on Friday.

Cheers Cali

Lee

Betreff: DL380 Gen9 RAM Upgrade Issues

LeeRH — Mon, 12 Dec 2022 12:19:23 GMT

Thanks again, Cali, this totally worked and all ram is available now.

Betreff: DL380 Gen9 RAM Upgrade Issues

Sunitha_Mod — Tue, 13 Dec 2022 14:05:39 GMT

Hello @LeeRH,

Excellent!

We are glad to know the problem has been resolved.