Memory module installation rules and order

Your server has 32 memory slots with 16 channels. For a list of supported memory options, see:

Lenovo ServerProven website

More information about optimizing memory performance and configuring memory is available at the Lenovo Press Web site:

Memory - Lenovo Press

In addition, you can take advantage of a memory configurator, which is available at the following site:

Lenovo Enterprise Solutions Configurator

The following illustration helps you to locate the memory module slots on the system board.

Note

It is recommended to install memory modules with the same rank in each channel.

Figure 1. Memory module slots on the system board

Table 1. Memory slot and channel identification

Channel	F0	F1	E0	E1	H0	H1	G0	G1		C1	C0	D1	D0	A1	A0	B1	B0
Slot number	16	15	14	13	12	11	10	9		8	7	6	5	4	3	2	1
	32	31	30	29	28	27	26	25		24	23	22	21	20	19	18	17

Memory module installation guideline​

• Two types of configurations are supported. Consider corresponding rules and population sequence accordingly:

  • DRAM DIMM installation order (RDIMMs or 3DS RDIMMs)

  • PMEM and DRAM DIMM installation order

• A label on each DIMM identifies the DIMM type. This information is in the format xxxxx nRxxx PC4-xxxxx-xx-xx-xxx. Where n indicates if the DIMM is single-rank (n=1) or dual-rank (n=2).

• At least one DIMM is required for each processor. Install at least eight DIMMs per processor for good performance.

• When you replace a DIMM, the server provides automatic DIMM enablement capability without requiring you to use the Setup utility to enable the new DIMM manually.