Intel D946GZAB - Desktop Board Motherboard - Installing Dimms; Use DDR2 Dimms

Installing and Replacing Desktop Board Components
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Installing DIMMs
To make sure you have the correct DIMM, place it on the illustration of the DDR2
DIMM in
Figure 14. All the notches should match with the DDR2 DIMM.
Figure 14. Use DDR2 DIMMs