Fujitsu D2952 Teknik Kılavuz - Sayfa 24

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Main memory

– The higher the capacity, the further away from the CPU the memory module

has to be mounted per channel!

– Performance channel mode is installed the same as independent channel

mode, but requires identical modules for the same slot on all channels per

CPU!

– Empty DIMM slots of CPU 1 must be fitted with dummy DIMM modules to

ensure sufficient cooling of the system.

3.2.3.1

Independent Channel Mode

This mode allows the memory modules to be arranged in any order in each

channel. The channels do not have to be populated identically.

You can use memory modules with different speed ratings within a channel,

whereby the settings of the slowest memory module are used for each

channel.

All channels work with the fastest common frequency.

All timings except for the clock frequency can vary between the channels.

Always start by populating the main memory at CPU 1.

CAUTION!

The empty DIMM slots of CPU 1 must be fitted with dummy DIMM

modules to ensure sufficient cooling of the system. In addition always

an air duct has to be mounted to cover the DIMM modules and the

dummy DIMM modules of CPU1.

If memory modules with different memory capacities are to be installed for a

CPU then the rule applies that the higher the capacity, the further away from

the CPU the memory module has to be mounted per channel.

The DIMM sockets must be populated per channel in the following order:

CPU 1: DIMM1A -> DIMM1B -> DIMM1C

CPU 2: DIMM1D -> DIMM1E -> DIMM1F

CPU 1: DIMM2A -> DIMM2B -> DIMM2C

CPU 2: DIMM2D -> DIMM2E -> DIMM2F

CPU 1: DIMM3A -> DIMM3B -> DIMM3C

CPU 2: DIMM3D -> DIMM3E -> DIMM3F

Technical Manual

D2952 (BX924 S2)