Fujitsu D2952 Teknik Kılavuz - Sayfa 26

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Main memory

3.2.3.4

Spare Channel Mode

This mode is only supported by Intel

processors of the 5600 series.

In this mode, channel C forms a replacement for the two channels A and B and

channel F forms a replacement for the two channels D and E. Channels C and

F are not available as regular main memory. The channels are populated in the

same way as in Performance Channel Mode.

All three channels must be populated identically as regards the size and

organization of the memory modules.

The slots within a channel do not have to be populated identically, but the

corresponding slots of all three channels must be populated identically.

Memory modules with different clock frequencies and different speed ratings

can be used within a channel, whereby the settings of the slowest memory

module are used for the channel.

The timings in the active channels (A and B) and in the spare channel (C)

can be set differently.

Only 2/3 of the maximum memory bandwidth is available in Spare Channel

Mode.

In Spare Channel Mode, the total main memory available in the system is

2/3 the size of the installed memory.

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.

processors of type Intel

Technical Manual

Xeon

D2952 (BX924 S2)