ADLINK cPCI-6965 - Manual (Page 64)

50 Getting Started
5.2 Memory Module Installation
The cPCI-6965 Series supports DDR2-667 unbuffered non-ECC
memory modules via two stacked-type SO-DIMM sockets. The
SO-DIMM modules have a 200-pin footprint and are notched to
facilitate correct installation in the SO-DIMM sockets. At lease one
memory module will be pre-installed in the lower socket.
Installing the Memory Modules
Align the notch in the memory module with the key on the
SO-DIMM slot. Press down on the module until is it is properly
seated in the socket.