HP Pro 4300 Maintenance & Service Guide HP Compaq Pro 4300 All-in-One Busi - Page 47

Preparing to Disassemble the Computer, on Hinge Cover Panel, Memory Access Panel

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The system will automatically operate in single channel mode, dual channel mode, or flex mode, depending on how the SODIMMs are installed. Refer to the following table to identify the SODIMM channel locations. Table 6-1 Identifying SODIMM locations Location System Board Label Lower Socket DIMM0 Upper Socket DIMM0 Channel Channel B Channel A ● The system will operate in single channel mode if the SODIMM sockets are populated in one channel only. ● The system will operate in a higher-performing dual channel mode if the memory capacity of the SODIMM in Channel A is equal to the memory capacity of the SODIMM in Channel B. ● The system will operate in flex mode if the memory capacity of the SODIMM in Channel A is not equal to the memory capacity of the SODIMM 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 SODIMM in the system. There are two memory sockets on the system board located behind the memory access panel. To remove or install memory modules: To remove a memory module: 1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer on page 26). 2. Place the computer face down on a soft flat surface. HP recommends that you set down a blanket, towel, or other soft cloth to protect the screen surface from scratches or other damage. 3. Remove the center access panel (see Hinge Cover Panel on page 27). 4. Remove the memory access panel (see Memory Access Panel on page 29). Memory 39

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The system will automatically operate in single channel mode, dual channel mode, or flex mode,
depending on how the SODIMMs are installed. Refer to the following table to identify the SODIMM
channel locations.
Table 6-1
Identifying SODIMM locations
Location
System Board Label
Channel
Lower Socket
DIMM0
Channel B
Upper Socket
DIMM0
Channel A
●
The system will operate in single channel mode if the SODIMM sockets are populated in one
channel only.
●
The system will operate in a higher-performing dual channel mode if the memory capacity of the
SODIMM in Channel A is equal to the memory capacity of the SODIMM in Channel B.
●
The system will operate in flex mode if the memory capacity of the SODIMM in Channel A is not
equal to the memory capacity of the SODIMM 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 SODIMM in the
system.
There are two memory sockets on the system board located behind the memory access panel. To
remove or install memory modules:
To remove a memory module:
1.
Prepare the computer for disassembly (see
Preparing to Disassemble the Computer
on page
26
).
2.
Place the computer face down on a soft flat surface. HP recommends that you set down a
blanket, towel, or other soft cloth to protect the screen surface from scratches or other damage.
3.
Remove the center access panel (see
Hinge Cover Panel
on page
27
).
4.
Remove the memory access panel (see
Memory Access Panel
on page
29
).
Memory
39