IBM System x3950 X6 Product Manual page 13
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Also See for System x3950 X6:
- Product manual (54 pages) ,
- Installation and service manual (1730 pages) ,
- Planning and implementation manual (262 pages)
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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 5. Maximum memory speeds
DIMM
specification
Rank
Part numbers
Rated speed
Rated voltage
Operating voltage
Max qty supported*
Max DIMM capacity
Max memory capacity
Maximum operating speed - Performance mode (2:1 mode - SMI2 link operates at twice the DDR3 speed
shown)
1 DIMM per channel
2 DIMMs per channel
3 DIMMs per channel
Maximum operating speed - RAS mode (1:1 mode - SMI2 link operates at the DDR3 speed shown)
1 DIMM per channel
2 DIMMs per channel
3 DIMMs per channel
* Maximum quantity supported is shown for all processors installed.
The following memory protection technologies are supported:
ECC
Chipkill (for x4-based memory DIMMs)
Redundant bit steering (Double Device Data Correction)
Memory mirroring
Memory rank sparing
Chipkill and Redundant Bit Steering are supported in RAS mode. Chipkill is supported in Performance
mode.
IBM System x3950 X6
RDIMM
Single rank
00D5024 (4GB)
46W0672 (16GB)
00D5036 (8GB)
1600 MHz
1.35 V
1.35 V
1.5 V
1.35 V
192
192
192
8 GB
8 GB
16 GB
1.5 TB
1.5 TB
3.0 TB
1333 MHz
1333 MHz
1333 MHz
1333 MHz
1333 MHz
1333 MHz
1066 MHz
1333 MHz
1066 MHz
1333 MHz
1600 MHz
1333 MHz
1333 MHz
1600 MHz
1333 MHz
1066 MHz
1333 MHz
1066 MHz
Dual rank
Quad rank
46W0676 (32GB)
1600 MHz
1600 MHz
1.35 V
1.35 V
1.5 V
1.35 V
192
192
16 GB
32 GB
3.0 TB
6 TB
1333 MHz 1333 MHz 1333 MHz
1333 MHz 1333 MHz 1333 MHz
1333 MHz 1333 MHz 1333 MHz
1600 MHz 1333 MHz 1600 MHz
1600 MHz 1333 MHz 1600 MHz
1333 MHz 1333 MHz 1333 MHz
LRDIMM
8-rank
46W0741 (64GB)
1333 MHz
1.35 V
1.5 V
1.35 V
1.5 V
192
192
192
32 GB
64 GB
64 GB
6 TB
12 TB
12 TB
1333 MHz
1333 MHz
1333 MHz
1333 MHz
1333 MHz
1333 MHz
1333 MHz
1333 MHz
1333 MHz
1333 MHz
1333 MHz
1333 MHz
13
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