Intel DP67BA - Installing and Removing System Memory; Guidelines for Dual Channel Memory Configuration; Two or Four Dimms; Example Dual Channel Memory Configuration with Two Dimms

Intel Desktop Board DP67BA Product Guide
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Installing and Removing System Memory
Desktop board DP67BA has four 240-pin DDR3 DIMM sockets arranged in two channels
(A and B).
Guidelines for Dual Channel Memory Configuration
Before installing DIMMs, read and follow these guidelines for dual channel memory
configuration.
Two or Four DIMMs
Install a matched pair of DIMMs equal in speed and size (see Figure 12) in the blue
socket of channel A (DIMM 1) and channel B (DIMM 2).
Figure 12. Example Dual Channel Memory Configuration with Two DIMMs
If additional memory is to be used, install another matched pair of DIMMs (see
Figure 13) in the black socket of channel A (DIMM 3) and channel B (DIMM 4).
Figure 13. Example Dual Channel Memory Configuration with Four DIMMs