IBM X3850 X6 User Manual

70 IBM System x3850 X6 and x3950 X6 Planning and Implementation Guide
3.8.1 Memory options
In this section, we describe available memory options, memory characteristics, and speeds
depending on the selected memory mode.
Table 3-5 lists the memory options that are available for x3850 X6 and x3950 X6 servers:
Table 3-5 Memory options
Table 3-6 shows the characteristics of the supported DIMMs and the memory speeds. The
cells highlighted in grey indicate that the X6 servers support higher memory frequencies or
larger memory capacity, or both, than the Intel processor specification defines.
Table 3-6 Maximum memory speeds
Part
number
Feature
code
Description Maximum
supported
(x3850 X6 / x3950 X6)
Standard
models
where used
RDIMMs
00D5024 A3QE 4GB (1x4GB, 1Rx4, 1.35V) PC3L-12800
CL11 ECC DDR3 1600MHz LP RDIMM
96 / 192 (24 per CPU) -
00D5036 A3QH 8GB (1x8GB, 1Rx4, 1.35V) PC3L-12800
CL11 ECC DDR3 1600MHz LP RDIMM
96 / 192 (24 per CPU) A4x, B1x, B3x,
BAx, C1x, C4x,
CAx, CCx
46W0672 A3QM 16GB (1x16GB, 2Rx4, 1.35V) PC3L-12800
CL11 ECC DDR3 1600MHz LP RDIMM
96 / 192 (24 per CPU) H1x, HAx
LRDIMMs
46W0676 A3SR 32GB (1x32GB, 4Rx4, 1.35V) PC3L-12800
CL11 ECC DDR3 1600MHz LP LRDIMM
96 / 192 (24 per CPU) -
46W0741 A451 64GB (1x64GB, 8Rx4, 1.35V) PC3-10600
DDR3 1333MHz LP LRDIMM
96 / 192 (24 per CPU) -
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.
DIMM
specification
RDIMM LR-DIMM
Ranks Single-rank DIMM Dual-rank DIMM Quad-rank LR-DIMM 8-rank LR-DIMM
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. DIMM
capacity
8 GB 8 GB 16 GB 16 GB 32 GB 32 GB 64 GB 64 GB
Max. memory
capacity
a
0.75 TB /
1.5 TB
0.75 TB /
1.5 TB
1.5 TB /
3TB
1.5 TB /
3TB
3 TB /
6TB
3 TB /
6TB
6 TB /
12 TB
6 TB /
12 TB
Maximum operating speed - Performance mode (2:1 mode - SMI2 link operates at twice
the DDR3 speed shown)
1 DIMM / channel
1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz

IBM X3850 X6 Specifications

General

Brand	IBM
Model	X3850 X6
Category	Server
Language	English