HP 8000f Maintenance and Service Guide: HP Compaq 8000f Elite Business PC Ultr - Page 52

Populating SODIMM Sockets,

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Populating SODIMM Sockets There are two SODIMM sockets on the system board, with one socket per channel. The sockets are labeled XMM1 and XMM3. The XMM1 socket operates in memory channel A. The XMM3 socket operates in memory channel B. Figure 6-14 SODIMM Socket Locations Table 6-1 SODIMM Socket Locations Item Description Socket Color 1 SODIMM1 socket, Channel A Black 2 SODIMM3 socket, Channel B White NOTE: A SODIMM must occupy the black XMM1 socket. Otherwise, the system will display a POST error message indicating that a memory module must be installed in the black socket. The system will automatically operate in single channel mode, dual channel mode, or flex mode, depending on how the SODIMMs are installed. ● 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. 42 Chapter 6 Removal and Replacement Procedures

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Populating SODIMM Sockets
There are two SODIMM sockets on the system board, with one socket per channel. The sockets are
labeled XMM1 and XMM3. The XMM1 socket operates in memory channel A. The XMM3 socket
operates in memory channel B.
Figure 6-14
SODIMM Socket Locations
Table 6-1
SODIMM Socket Locations
Item
Description
Socket Color
1
SODIMM1 socket, Channel A
Black
2
SODIMM3 socket, Channel B
White
NOTE:
A SODIMM must occupy the black XMM1 socket. Otherwise, the
system will display a POST error message indicating that a memory module
must be installed in the black socket.
The system will automatically operate in single channel mode, dual channel mode, or flex mode,
depending on how the SODIMMs are installed.
●
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.
42
Chapter 6
Removal and Replacement Procedures