28.4 Step 4: Install the Memory
Memory slots are always numbered,
usually beginning with 0, but sometimes with 1. Always populate the
memory slots from lowest to highest. That is, slot 0 should be
occupied before you install a module in slot 1, both slots 0 and 1
should be occupied before you install a module in slot 2, and so on.
This section illustrates installing PC133 SDR-SDRAM
DIMMs
in the D845WNL motherboard. Other modern memory
modules—DDR-SDRAM DIMMs and Rambus RIMMs—are very similar
physically and install the same way. For information about installing
older-style memory, see Chapter 5.
To install the memory module, first pivot the plastic retaining arms
on the DIMM
socket away from the socket toward the motherboard. Align the keying
notch(es) in the DIMM module with the corresponding keys in the
memory slot, and the module itself with the slots in the side
supports. These keying notches assure that you cannot install the
proper module backward (because the keying notches are offset) and
that you cannot install the wrong type of module (because SDR-SDRAM,
DDR-SDRAM, and RDRAM all use different keying notch positions).
Once you have the module aligned with the slot, place one thumb on
each end of the module and press straight down until the module seats
in the slot, as in Figure 28-21. As the module seats,
the retaining arms should be forced to the vertical position. If that
doesn't happen, it usually means that the module
isn't fully seated or that the retaining mechanism
is defective. If you're sure the module is fully
seated and the arms are still spread, move them inward yourself to
lock the module in place, as shown in Figure 28-22.
If you have additional memory modules, install them in the same
fashion. After you finish configuring the motherboard and installing
processor and memory, lay the motherboard aside for the time being.
Use the anti-static bag or foam packaging that came with the
motherboard to prevent damage.
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