Intel DP55WB - Media Series P55 micro-ATX Core i7 i5 LGA1156 Desktop Motherboard - Memory Channel and DIMM Configuration

Product Description
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Figure 3 illustrates the memory channel and DIMM configuration.
Figure 3. Memory Channel and DIMM Configuration
NOTE
The Intel P55 Express Chipset requires memory to be populated in the Channel A,
DIMM 0 socket.
For best memory performance always install memory into the blue DIMM memory
sockets if only installing two DIMMs in your configuration.