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The system will operate in ex mode if the memory capacity of the memory module in Channel A is not
equal to the memory capacity of the memory module in Channel B. In ex mode, the channel populated
with the least amount of memory describes the total amount of memory assigned to dual channel and
the remainder is assigned to single channel. If one channel will have more memory than the other, the
larger amount should be assigned to channel A.
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In any mode, the maximum operational speed is determined by the slowest memory module in the
system.
To remove a memory module:
1. Prepare the computer for disassembly (see Preparing to disassemble the computer on page 19).
2. Remove the rear port cover (see Rear port cover on page 23).
3. Remove the stand (see Attaching and removing a stand on page 20).
4. Remove the access panel (see Access panel on page 24).
5. Remove the system board shield (see System board (EMI) shield on page 30).
6. To remove a memory module, press outward on the two latches on each side of the SODIMM (1), then
pull the SODIMM out of the socket (2).
7. To install a memory module, slide the SODIMM into the socket at approximately a 30° angle (1), then
press the SODIMM down (2) so that the latches lock it in place.
NOTE: A memory module can be installed in only one way. Match the notch on the module with the tab
on the memory socket.
The computer automatically recognizes the additional memory when you turn on the computer.
32 Chapter 4 Removal and Replacement Procedures
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