Aaeon PCM-6890 User Manual page 28

The left edge of the PCM-6890 contains a socket for 168-pin dual
inline memory module (DIMM). The socket uses 3.3 V unbuffered
synchronous DRAM (SDRAM). DIMM is available in capacities of
16, 32, 64, or 128 MB. The socket can be filled in the DIMM of
any size, giving your PCM-6890 single board computer between 16
and 128 MB of memory.
Your PCM-6890 can accept both regular and PC-100 SDRAM
DIMM Module(with or without parity). However, if the Pentium II
350MHz or up CPU is used, The PCM-6890 can only accept PC-100
SDRAM DIMM Module.
Single-sided modules are typically 16 or 64 MB; double-sided
modules are usually 32 or 128 MB.
To install DIMM, first make sure the two handles of the DIMM
socket are in the "open" position. i.e. The handles remain outward.
Slowly slide the DIMM module along the plastic guides on both
ends of the socket. Then press the DIMM module right down into
the socket, until you hear a click. This is when the two handles
have automatically locked the memory module into the correct
position of the DIMM socket. (See Figure below) To take away the
memory module, just push both handles outward, and the memory
module will be ejected by the mechanism in the socket.
16 PCM-6890 User Manual