Datasheet

System x3550 M5 15
The following table shows the characteristics of the supported DIMMs. Table cells highlighted with a gray
background indicate when the number of DIMMs per channel still allows the DIMMs to operate at a rated
speed.
Table 5. Maximum memory speeds
DIMM specification RDIMM LRDIMM
Rank Single rank Dual rank Quad rank
Part numbers 46W0784 (4 GB)
46W0788 (8 GB)
46W0792 (8 GB) 46W0796 (16 GB)
95Y4808 (32 GB)
46W0800 (32 GB)
95Y4812 (64 GB)
Rated speed 2133 MHz 2133 MHz 2133 MHz 2133 MHz
Rated voltage 1.2 V 1.2 V 1.2 V 1.2 V
Maximum quantity supported** 24 24 24 24
Maximum DIMM capacity 8 GB 8 GB 32 GB 64 GB
Maximum memory capacity 192 GB 192 GB 768 GB 1.5 TB
Maximum memory at rated
speed
128 GB 128 GB 512 GB 512 GB
Maximum operating speed
1 DIMM per channel 2133 MHz 2133 MHz 2133 MHz 2133 MHz
2 DIMMs per channel 2133 MHz 2133 MHz 2133 MHz 2133 MHz
3 DIMMs per channel 1600 MHz 1600 MHz 1866 MHz 1866 MHz
** The maximum quantity that is supported is shown for two processors installed.