IBM System x3950 X6, Руководство по эксплуатации продукта

Страница: 14 / 53

IBM System x3950 X6 14
All DIMMs in the server operate at the same speed, which is determined as the lowest value of one of

the following options:
Memory speed that is supported by the specific processor. o
Lowest of maximum operating speeds for selected memory configuration that depends on rated o
speed, operating voltage, and quantity of DIMMs per channel, as shown under "Maximum
operating speed" section in the following table.
The server also supports IBM eXFlash DIMMs, which are also installed in the DIMM slots. The "IBM

eXFlash memory-channel storage" section describes these eXFlash DIMMs and the configuration
rules.
The following table shows the characteristics of the supported DIMMs. Tables cells that are highlighted
with a gray background indicate that the server supports higher memory frequencies or larger memory
capacity (or both) than the Intel processor specification defines.
Memory speed
: In performance mode, memory channels operate independently, and the SMI2 link
operates at twice the DDR3 speed. In RAS mode, two channels operate synchronously, and the SMI2 link
operates at the DDR3 speed.
Table 6. Maximum memory speeds
DIMM
specification RDIMM LRDIMM
Rank Single rank Dual rank Quad rank 8-rank
Part numbers 00D5024 (4GB)
00D5036 (8GB)
46W0672 (16GB) 46W0676 (32GB) 46W0741 (64GB)
Rated speed 1600 MHz 1600 MHz 1600 MHz 1333 MHz
Rated voltage 1.35 V 1.35 V 1.35 V 1.35 V
Operating voltage 1.35 V 1.5 V 1.35 V 1.5 V 1.35 V 1.5 V 1.35 V 1.5 V
Max qty supported* 192 192 192 192 192 192 192 192
Max DIMM capacity 8 GB 8 GB 16 GB 16 GB 32 GB 32 GB 64 GB 64 GB
Max memory capacity 1.5 TB 1.5 TB 3.0 TB 3.0 TB 6 TB 6 TB 12 TB 12 TB
Maximum operating speed - Performance mode (2:1 mode - SMI2 link operates at twice the DDR3 speed
shown)
1 DIMM per channel 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz
2 DIMMs per channel 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz
3 DIMMs per channel 1066 MHz 1333 MHz 1066 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz
Maximum operating speed - RAS mode (1:1 mode - SMI2 link operates at the DDR3 speed shown)
1 DIMM per channel 1333 MHz 1600 MHz 1333 MHz 1600 MHz 1333 MHz 1600 MHz 1333 MHz 1333 MHz
2 DIMMs per channel 1333 MHz 1600 MHz 1333 MHz 1600 MHz 1333 MHz 1600 MHz 1333 MHz 1333 MHz
3 DIMMs per channel 1066 MHz 1333 MHz 1066 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz
* Maximum quantity supported is shown for all processors installed.