BCM RX35Q - System Memroy; Overview; Dual-Channel Mode Population Rule

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1.7 System Memory
1.7.1 Overview
The mainboard comes with four 240-pin DDR2 Dual Inline Memory Modules (DIMM) sockets. You may use 667MHz
(PC2-5300), or 800MHz (PC2-6400); Non-ECC, Un-buffered 1.8V DDR2 memory modules on this board (2GB
maximum for each slot). It is recommended to use 667MHz DIMM for 8GB configuration.
1.7.2 Dual-Channel mode Population Rule
In Dual-Channel mode, the memory modules can transmit and receive data with two data bus lines simultaneously.
Enabling Dual-Channel mode can enhance the system performance. Please refer to the following illustrations for
population rules under Dual-Channel mode.
• In dual-channel configurations, install only identical (the same type and size) DDR2
memory module pairs for each channel. For instance, DIMM_A1 paired with DIMM_B1,
DIMM_A2 paired with DIMM_B2.
• Always install DIMMs with the same CAS latency. For optimum compatibility, it is
recommended that you obtain memory modules from the same vendor.