Lenovo RS210 manual Removing a memory module, Supported RDIMM population per channel

vThe following table lists the supported RDIMM population.

Table 11. Supported RDIMM population per channel

DIMM connectors	DIMMs installed in			Ranks per DIMM
per channel	each channel	DIMM type	DIMM speed	(any combination)
3	1	Registered DDR3	1066, 1333	Single-rank,
		ECC		dual-rank
3	2	Registered DDR3	1066, 1333	Single-rank,
		ECC		dual-rank
3	3	Registered DDR3	800	Single-rank,
		ECC		dual-rank
3	1	Registered DDR3	1066	Quad-rank
		ECC
3	2	Registered DDR3	800	Quad-rank
		ECC

vThe following table lists the maximum DIMM population using ranked RDIMMs.

Table 12. Maximum memory population using ranked RDIMMs (depending on your model)

Number of RDIMMs	DIMM type	Size		Total memory
6	Single-rank RDIMMs	1	GB	6 GB
6	Single-rank RDIMMs	2	GB	12 GB
6	Dual-rank RDIMMs	2	GB	12 GB
4	Dual-rank RDIMMs	4	GB	16 GB
4	Quad-rank RDIMMs	4	GB	16 GB
6	Dual-rank RDIMMs	4	GB	24 GB
4	Quad-rank RDIMMs	8	GB (when available)	32 GB

vThe following table shows the RDIMM memory population rule to optimize the system performance.

Table 13. RDIMM population rule for dual-channel symmetric mode

DIMM connector	DIMM connector	DIMM connector	DIMM connector	DIMM connector	DIMM connector
1	2	3	4	5	6
Populated	Empty	Empty	Empty	Empty	Empty
Populated	Empty	Empty	Populated	Empty	Empty
Populated	Populated	Empty	Populated	Populated	Empty
Populated	Populated	Populated	Populated	Populated	Populated

Note: The amount of usable memory is reduced, depending on the system configuration. A certain amount of memory must be reserved for system resources. To view the total amount of installed memory and the amount of configured memory, run the Setup utility.

Removing a memory module

To remove a DIMM, complete the following steps:

1.Read the safety information in “Important Safety Information” on page 1 and “Guidelines for trained service technicians” on page 115.

2.Turn off the server and peripheral devices and disconnect the power cords and all external cables, if necessary.

3.Remove the cover (see “Removing and installing the cover” on page 119).

124ThinkServer ThinkServer RS210, Types 6531, 6532, 6533, and 6534: Hardware Maintenance Manual