Table 8. Maximum memory speeds
Specification RDIMMs
Rank Single rank Dual rank
Part numbers 46W0821 (8 GB) 46W0829 (16 GB)
46W0833 (32 GB)
Rated speed 2400 MHz 2400 MHz
Rated voltage 1.2 V 1.2 V
Operating voltage 1.2 V 1.2 V
Maximum quantity* 16 16
Largest DIMM 8 GB 32 GB
Max memory capacity 128 GB 512 GB
Max memory at rated speed 64 GB 256 GB
Maximum operating speed (MHz)
One DIMM per channel 2400 MHz 2400 MHz
Two DIMMs per channel 2133 MHz 2133 MHz
* The maximum quantity that is supported is shown for two processors that are installed. When one
processor is installed, the maximum quantity that is supported is half of that shown.
The following memory protection technologies are supported:
ECC
Memory mirroring
Memory sparing
Memory scrubbing
If memory mirroring is used, DIMMs must be installed in pairs (minimum of one pair per CPU), and both
DIMMs in a pair must be identical in type and size.
If memory rank sparing is used, a minimum of one quad-rank DIMM or two single-rank or dual-rank DIMMs
must be installed per populated channel (the DIMMs do not need to be identical). In rank sparing mode,
one rank of a DIMM in each populated channel is reserved as spare memory. The size of a rank varies
depending on the DIMMs that are installed.
Internal storage
Each sd350 is connected to six 2.5-inch hot-swap drive bays. The 24 drive bays (six for each server) are
physically located at the front of the n400 enclosure and are routed to each server via SAS/SATA cables
connected to the drive backplane.
The following figure shows the drive bays.
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