Installing Dimms; Use Ddr3 Dimms - Intel DZ68PL Product Manual

Intel Desktop Board DZ68PL Product Guide

Installing DIMMs

To make sure you have the correct DIMM, place it on the illustration of the DDR3
DIMM in Figure 15. All the notches should match with the DDR3 DIMM.
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Figure 15. Use DDR3 DIMMs