Unlike a SIMM, a DIMM must be specifically compatible to your motherboard. You
should never need to force a DIMM into a socket. If it doesn’t align or seat with gentle force
or a slight end-to-end rocking pressure, then double-check the motherboard’s specifica-
tions and make sure you have the correct DIMM. If the key of the socket doesn’t match the
DIMM, it is likely you have the wrong voltage or buffer type and must exchange it. The
most commonly used type of DIMM is an unbuffered memory with 3.3 volts.Configuring the PC for Memory
Most newer PC systems will automatically recognize new memory added to the mother-
board and make any necessary configuration adjustments. However, there are those that
require that you configure the new memory by changing the BIOS configuration before
they will recognize any new memory. Check your motherboard documentation to be
sure that you don’t also need to adjust jumpers or DIP switches on the motherboard to
configure the memory. Some older PCs require these settings as well.Removing a Memory Module
To remove a DIMM, simply release the locking tabs at each end of the socket and pull the
module straight u pand out of the socket. Refer to the precautions listed above and care-
fully handle and protect the module during this operation.
ASIMMisinstalledatanangleandthenlockedintoitsverticalposition.Toremoveit,
you must perform the installation steps in reverse. After releasing the locking tabs, snap
the SIMM forward (away from the back of the socket) to a 45-degree angle and lift it up
and out of the socket.
Immediately place the SIMM or DIMM in a protective antistatic sleeve for storage,
regardless of how long it will be stored.Chapter 7: Computer Memory^155