Lenovo Flex System x240 Betriebsanweisung PDF herunterladen (Seite 14)

Flex System x240 Compute Node (E5-2600 v2) 14

The following rules apply when selecting the memory configuration:

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.

Mixing of different types of DIMMs (UDIMM , RDIMM and LRDIMM) in the same server is not



supported.

The maximum number of ranks supported per channel is eight.



The maximum quantity of DIMMs that can be installed in the server depends on the number of CPUs,



DIMM rank, and operating voltage, as shown in the "Max. qty supported" row in the following table.

The shaded cells indicate that the DIMM type supports the maximum number of DIMMs (24 for the

x240)

All DIMMs in all CPU memory channels operate at the same speed, which is determined as the



lowest value of:

Memory speed supported by specific CPU



Lowest maximum operating speed for the selected memory configuration that depends on rated



speed, as shown under the "Max. operating speed" section in the following table. The shaded

cells indicate that the speed indicated is the maximum that the DIMM allows.

The following two tables (Part 1 and Part 2) show the maximum memory speeds that are achievable

based on the installed DIMMs and the number of DIMMs per channel. The tables also show maximum

memory capacity at any speed supported by the DIMM and maximum memory capacity at rated DIMM

speed. In the tables, cells highlighted with a gray background indicate when the specific combination of

DIMM voltage and number of DIMMs per channel still allows the DIMMs to operate at rated speed.

Table 7. Maximum memory speeds (Part 1 - UDIMMs and LRDIMMs)

Specification UDIMMs LRDIMMs

Rank Dual rank Quad rank

Part numbers 00D5012 (4 GB)

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 V

Maximum quantity* 16 16 24

Largest DIMM 8 GB 8 GB 32 GB

Max memory capacity 128 GB 128 GB 768 GB

Max memory at rated

speed

None 128 GB 512 GB

Maximum operating speed (MHz)

One DIMM per channel 1333 MHz 1600 MHz 1866 MHz

Two DIMMs per channel 1333 MHz 1600 MHz 1866 MHz

Three DIMMs per channel NS† NS† 1333 MHz

* The maximum quantity supported is shown for two processors installed. When one processor is installed, the

maximum quantity supported is half of that shown.

† NS = Not supported. UDIMMs only support up to 2 DIMMs per channel.

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