30 Options Guide BX920 S2
Main memory
The memory modules are organized in 3 channels per CPU (A-C and D-F).
Slots DIMM 1A - 1C and 2A - 2C are assigned to CPU 1. Slots DIMM 1D - 1F
belong to CPU 2, but are only populated if CPU 2 is installed.
There are four modes of operation for the main memory:
● Independent Channel Mode (maximum memory configuration)
The populated memory can be used in full (maximum 144 GB).
● Mirrored Channel Mode (maximum security)
Only the populated memory in the 2 channels A and D (see figure 12 on
page 29) can be used (maximum 48 GB). The channels B and E are for
failure protection purposes only. They contain the mirrored data from
channels A and D. Channels C and F are not used.
● Performance channel mode (maximum performance)
The populated memory of the six channels (A - F) can be used completely
(max. 144 GB).
● Spare Channel Mode (high memory configuration with high security)
Only the populated memory in the 4 channels A, B, D and E can be used
(max. 96 GB). Channels C and F are for failure protection purposes only.
Spare channel mode is only supported by Intel processors of type Intel
®
Xeon
®
5600 processor series.
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