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.