HP ProOne 400 Maintenance And Service Manual page 42

The system will operate in flex mode if the memory capacity of the memory module in Channel A is not
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equal to the memory capacity of the memory module in Channel B. In flex 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.
In any mode, the maximum operational speed is determined by the slowest memory module in the
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system.
To remove a memory module:
1. Prepare the computer for disassembly (see
2. Remove the rear port cover (see
3. Remove the stand (see
4. Remove the access panel (see
5. Remove the system board shield (see
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:
on the memory socket.
The computer automatically recognizes the additional memory when you turn on the computer.
34 Chapter 4 Removal and Replacement Procedures
Rear port cover on page
Attaching and removing a stand on page
Access panel on page
A memory module can be installed in only one way. Match the notch on the module with the tab
Preparing to disassemble the computer on page
23).
24).
System board (EMI) shield on page
20).
32).
19).