Dell PowerEdge R6515 RAM upgrades

Question

We have a set of PowerEdge R6515 with 512G of RAM (8 slot * 64G) A1-A8. We have 8 remaining slots and would like to fully populate them (A9-A16). This is a single CPU AMD EPYC 7H12 2.6G 64C/128T and from what I've read all 16 slots are supported with the single CPU. However, it seems that with dual rank the RAM Is supported at 2933/MT not the current 3200/MT. Assuming we purchase the same spec RAM at 3200/MT or 2933/MT will this be a problem or will the system dial the speed down to 2933/MT?

From this document the current 3200/MT RAM will be dialed down to 2933/MT:

https://www.dell.com/support/manuals/en-us/poweredge-r6515/per6515_ism_pub/general-memory-module-installation-guidelines?guid=guid-80b1c1ad-14b7-4dd6-b122-abb0c82bd3e8&lang=en-us

Would it matter if the new RAM is like the original set is 3200/MT and the system will dial them all down to 2933/MT?

Otherwise, do we have to repurchase 8 2933/MT sticks vs just adding either 8 more (same spec) 3200/MT or 2933/MT?

DELL-Young E · Answer

Hello thanks for choosing Dell and welcome to our community.

In this case, I would recommend sourcing the same original parts from sales so that you'll end up installing identical DIMMs.

If you provide p/n for the DIMMs, you are adding we can check if they are validated for this system, assuming they are Dell branded, not 3rd party ones.

Respectfully,

Derek Schrock · Answer

They will be third party.  However, can you confirm that all RAM slots are supported and that we can use 3200/MT for all and they system will speed down to the required supported speed for the given installation (all 16 slot populated).

DELL-Charles R · Answer

Hello,

You are correct. The system will clock down the DIMMs automatically with two DIMMs per channel:

DIMM type	Rank type	Capacity	DIMM rated voltage and speed	Operating Speed
				1 DIMMs per Channel (DPC)	2 DIMMs per Channel (DPC)
RDIMM	1R	8 GB	DDR4 (1.2V), 3200 MT/s	3200 MT/s	2933 MT/s
	2R	16 GB, 32 GB, 64 GB	DDR4 (1.2V), 3200 MT/s	3200 MT/s	2933 MT/s

Derek Schrock · Answer

@DELL-Young E​  SNPP2MYXC/64GNP and SNPP2MYXC/64G and AA783423   are currently the models we're looking at.

DELL-Charles R · Answer

This looks good:

Manufacturer part SNPP2MYXC/64G | Dell part AA783423

This product is compatible with the following systems:

PowerEdge R6515

PowerEdge R6525

PowerEdge R7515

PowerEdge C6525

PowerEdge R7525

PowerEdge Hardware General

Dell PowerEdge R6515 RAM upgrades

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