Fujitsu N800 manual Single port mode one memory module The single memory module, System expansions

System expansions Memory expansion

The system operates in two different modes depending on how many memory modules are installed:

–Interleaved mode (two memory modules): The memory modules share a common address range. One memory responds to even-numbered cache lines, while the other responds to odd-numbered cache lines. This configu- ration offers the highest performance because it allow the two modules to be used in a balanced fashion, reducing address conflicts.

In interleaved mode, the DIMMs must be installed in pairs (one on each module) and in the same locations (Jx) on each module (see figure 32 on page 109).

2	6
– Single port mode (one memory module): The single memory module
1	1
responds to all memory addresses. The DIMMs on this single carrier do not
J	J
need to be installed in pairs.
J 9 J 1 0 J 1 1	1 3 J 1 4 J 1 5
8	J
J
J 7
J 6	J 4
J 5	J 3
	J 2
	J 1

Figure 32: Main memory module

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