Install a memory module

Memory modules are installed in the system boards that are accessed from the front of the server.

S002

CAUTION

The power-control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.

CAUTION

Make sure that all server power cords are disconnected from their power sources before performing this procedure.

See Memory module installation rules and order for detailed information about memory configuration and setup.

If you are installing an optional processor, install it before installing memory modules. See Install a processor-heat-sink module

See Lenovo ServerProven website for a list of all the memory module types and capacities that are supported for your server.

Note

• Do not mix RDIMMs and LR-DIMMs in the same server.

• Install higher capacity (ranked) DIMMs first, following the population sequence for the memory mode being used.

• Installing or removing DIMMs changes the server configuration. When you restart the server, it displays a message that indicates that the memory configuration has changed. There are multiple ways to view the server configuration. See Management options for a description of each management method and how each method applies to various deployment situations.

If the system board is already installed in the server:

1. If the front cover is installed, remove it. See Remove the front cover.

2. Remove the compute tray with the system board where you are installing the memory module. See Remove a compute tray.

3. If you are installing a memory module in the lower compute system board, remove the upper system board or system board filler. See Remove a system board.

Figure 1. Memory module locations

Table 1. Memory module locations on each system board

DIMM number	System board 1 (lower board, lower tray) DIMM number	System board 2 (upper board, lower tray) DIMM number	System board 3 (lower board, upper tray) DIMM number	System board 4 (upper board, upper tray) DIMM number
1	1	25	49	73
2	2	26	50	74
3	3	27	51	75
4	4	28	52	76
5	5	29	53	77
6	6	30	54	78
7	7	31	55	79
8	8	32	56	80
9	9	33	57	81
10	10	34	58	82
11	11	35	59	83
12	12	36	60	84
13	13	37	61	85
14	14	38	62	86
15	15	39	63	87
16	16	40	64	88
17	17	41	65	89
18	18	42	66	90
19	19	43	67	91
20	20	44	68	92
21	21	45	69	93
22	22	46	70	94
23	23	47	71	95
24	24	48	72	96

Complete the following steps to install a memory module:

1. Install the memory module.
   Figure 2. Memory module installation
   
   
   1. Open the memory module connector retaining clips. If a memory module is already installed in the connector, remove it.
   2. Align the keys on the memory module that you are installing with the connector; then, insert the memory module.
   3. Firmly press both ends of the memory module straight down into the connector until the retaining clips snap into the locked position.
2. If you are installing additional memory modules, do so now.