Intel DG33BU - Desktop Board Classic Series Motherboard - Installing Dimms; Use DDR2 Dimms

Intel Desktop Board DG33BU Product Guide
36
Installing DIMMs
To make sure you have the correct DIMM, place it on the illustration of the DDR2
DIMM in
Figure 16. All the notches should match with the DDR2 DIMM.
Figure 16. Use DDR2 DIMMs