Lenovo 3797 manual Installing a Dimm, Number of installed DIMMs Microprocessors Dimm connector

Table 10. Memory-mirroring mode DIMM population sequence

	Number of installed
DIMMs	microprocessors	DIMM connector
First pair of DIMMs	1	3, 6
Second pair of DIMMs	1	2, 5
Third pair of DIMMs	1	1, 4
Fourth pair of DIMMs	2	14, 11
Fifth pair of DIMMs	2	13, 10
Sixth pair of DIMMs	2	12, 9

Note: DIMM connectors 7, 8, 15, and 16 are not used in memory-mirroring mode.

When you install or remove DIMMs, the server configuration information changes. When you restart the server, the system displays a message that indicates that the memory configuration has changed.

Installing a DIMM

To install a DIMM, complete the following steps.

1.Read the safety information that begins on page vii and “Installation guidelines” on page 33.

2.Turn off the server and peripheral devices, and disconnect the power cord and all external cables (see “Turning off the server” on page 31).

3.Remove the server cover (see “Removing the cover” on page 37).

1 DIMM air baffle

2 PCI riser-card assembly 1

68ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Installation and User Guide