Lenovo Flex System X6 Compute Node Manuel du produit - Page 14

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Memory options

Lenovo DDR3 memory is compatibility tested and tuned for optimal performance and throughput. Lenovo

memory specifications are integrated into the light path diagnostic tests for immediate system

performance feedback and optimum system uptime. From a service and support standpoint, Lenovo

memory automatically assumes the system warranty.

The X6 Compute Nodes support DDR3 memory operating at speeds up to 1600 MHz with 24 DIMMs per

processor:

A 2-socket configuration supports up to 48 DIMMs.



A 4-socket scaled configuration supports up to 96 DIMMs.



An 8-socket configuration supports up to 192 DIMMs.



The following table lists the memory options that are available for X6 Compute Nodes.

Table 7. Memory options

Part number

Feature code

RDIMMs

00D5024

A3QE

00D5036

A3QH

46W0672

A3QM

LRDIMMs

46W0676

A3SR

46W0741

A451

Each processor has four memory channels to memory buffers that are implemented using Scalable

Memory Interface generation 2 (SMI2) chips. Each memory buffer has two memory channels and

implements three DIMMs per channel.

The following rules apply when selecting the memory configuration:

The X6 node supports RDIMMs and LRDIMMs.



LR-DIMMs and RDIMMs cannot be mixed within a single compute node or a scaled complex.



Mixing 1.5 V and 1.35 V DIMMs in the same server is supported. In such a case, all DIMMs operate at



1.5 V.

The processors support two memory modes: Performance mode and RAS (or lockstep) mode. In



RAS (lockstep) mode, DIMMs must be installed in a pair, and the SMI link operates at the speed of

the memory bus.

When RDIMMs are installed, the maximum number of ranks that are supported per channel is eight.



With LRDIMMs, the rank count per channel can be 32 (LRDIMM ranks are only 25% of the electrical

load of an RDIMM rank).

Flex System X6 Compute Node (7903)

Description

4GB (1x4GB, 1Rx4, 1.35V) PC3L-12800

CL11 ECC DDR3 1600MHz LP RDIMM

8GB (1x8GB, 1Rx4, 1.35V) PC3L-12800

CL11 ECC DDR3 1600MHz LP RDIMM

16GB (1x16GB, 2Rx4, 1.35V) PC3L-12800

CL11 ECC DDR3 1600MHz LP RDIMM

32GB (1x32GB, 4Rx4, 1.35V) PC3L-12800

CL11 ECC DDR3 1600MHz LP LRDIMM

64GB (1x64GB, 8Rx4, 1.35V) PC3-10600

DDR3 1333MHz LP LRDIMM

Maximum

Models

supported

where used

48 (24 per CPU)

All models

48 (24 per CPU)