Lenovo 6523, 6524 Registered DIMMs RDIMMs, Following table lists the supported Udimm population

vThe following table lists the supported UDIMM population.

Table 6. Supported UDIMM population per channel

				Ranks per
DIMMs slots	DIMMs installed			DIMM (any
per channel	in each channel	DIMM type	DIMM speed	combination)
2	1	Unbuffered	1066, 1333	single-rank,
		DDR3 ECC		dual-rank
2	2	Unbuffered	1066, 1333	single-rank,
		DDR3 ECC		dual-rank

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

Table 7. Maximum memory population using ranked UDIMMs (depending on your model)

Number of UDIMMs	DIMM type	DIMM size		Total memory
4	single-rank UDIMMs	1	GB	4 GB
4	single-rank UDIMMs	2	GB	8 GB
4	dual-rank UDIMMs	2	GB	8 GB
4	dual-rank UDIMMs	4	GB (when	16 GB
		available)

vThe following table lists the UDIMM memory population rule to optimize the system performance.

Table 8. UDIMMs population rule for dual-channel symmetric mode

DIMMs	DIMMs	DIMMs	DIMMs	DIMMs	DIMMs
connector 1	connector 2	connector 3	connector 4	connector 5	connector 6
populated	empty	empty	empty	empty	empty
populated	empty	empty	populated	empty	empty
populated	populated	empty	populated	populated	empty

Registered DIMMs (RDIMMs)

The following notes provide information that you must consider when you install

RDIMMs:

vThe memory channels run at the fastest common frequency of the installed DIMMs.

vDo not use both RDIMMs and UDIMMs in the same server.

vThe server supports up to three single-rank, dual-rank, or quad-rank RDIMMs per channel.

vThe RDIMM options that are available for the server are 1 GB, 2 GB, 4 GB, and 8 GB (when available) memory DIMMs.

vYou can install a maximum of 32 GB of memory in the server when you use RDIMMs.

40ThinkServer TS200 Types 6522, 6523, 6524, 6525, 6526, 6528, 6529, and 6530: Installation and User Guide