Installing Dimms; Use Ddr3 Dimms - Intel DP43BF Product Manual

Intel Desktop Board DP43BFL Product Guide

Installing DIMMs

To make sure you have the correct DIMM, place it on the illustration of the DDR3
DIMM in Figure 16. All the notches should match with the DDR3 DIMM.
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Figure 16. Use DDR3 DIMMs