IBM System x3650 M4 HD

IBM System x3650 M4 HD 12
Table 5. Maximum memory speeds (Part 2: UDIMMs and LRDIMMs)
DIMM specification UDIMM LRDIMM
Rank Dual rank Quad rank
Part number 00D5016 (8 GB) 46W0761 (32 GB)
Rated speed 1600 MHz 1866 MHz
Rated voltage 1.35 V 1.5 V
Operating voltage 1.35 V 1.5 V 1.5 B
Max. qty supported* 16 16 24
Max. DIMM capacity 8 GB 8 GB 32 GB
Max. memory capacity 128 GB 128 GB 768 GB
Max. memory
at rated speed
None 128 GB 256 GB
Maximum operating speed
1 DIMM per channel 1333 MHz 1600 MHz 1866 MHz
2 DIMMs per channel 1333 MHz 1600 MHz 1600 MHz
3 DIMMs per channel No support No support 1066 MHz
* The maximum quantity that is supported is shown for two processors installed.
The following memory protection technologies are supported:
ECC

Chipkill (for x4-based memory DIMMs)

Memory mirroring

Memory rank sparing

If memory mirroring is used, DIMMs must be installed in pairs (minimum of one pair per each CPU), and
both DIMMs in a pair must be identical in type and size.
If memory rank sparing is used, then 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 being 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.