HP dx2100 HP Compaq dx2100 MT Business PC Service Reference Guide (1st Edition - Page 112

DIMM Sockets, labeled XMM1, XMM2, and XMM4. Sockets XMM1 and XMM2 operate in memory

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Memory DIMM Sockets There are four DIMM sockets on the system board, with two sockets per channel. The sockets are labeled XMM1, XMM2, XMM3, and XMM4. Sockets XMM1 and XMM2 operate in memory channel A. Sockets XMM3 and XMM4 operate in memory channel B. ✎ The system board shown below may be slightly different from the one in the computer. Item 1 2 3 4 Description DIMM socket XMM1, Channel A DIMM socket XMM2, Channel A DIMM socket XMM3, Channel B DIMM socket XMM4, Channel B Socket Color Black White Black White The system will automatically operate in single channel mode, dual channel Asymmetric mode, or a higher-performing dual channel Interleaved mode, depending on how the DIMMs are installed. ■ The system will operate in single channel mode if the DIMM sockets are populated in one channel only. ■ The system will operate in dual channel Asymmetrical mode if the total memory capacity of the DIMMs in Channel A is not equal to the total memory capacity of the DIMMs in Channel B. ■ The system will operate in a higher-performing dual channel Interleaved mode if the total memory capacity of the DIMMs in Channel A is equal to the total memory capacity of the DIMMs in Channel B. The technology and device width can vary between the channels. For example, if Channel A is populated with two 256MB DIMMs and Channel B is populated with one 512MB DIMM, the system will operate in Interleaved mode. ■ In any mode, the maximum operational speed is determined by the slowest DIMM in the system. E-2 404569-001 Service Reference Guide, dx2100 MT

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E–2
404569-001
Service Reference Guide, dx2100 MT
Memory
DIMM Sockets
There are four DIMM sockets on the system board, with two sockets per channel. The sockets are
labeled XMM1, XMM2, XMM3, and XMM4. Sockets XMM1 and XMM2 operate in memory
channel A. Sockets XMM3 and XMM4 operate in memory channel B.
The system board shown below may be slightly different from the one in the computer.
The system will automatically operate in single channel mode, dual channel Asymmetric mode,
or a higher-performing dual channel Interleaved mode, depending on how the DIMMs are
installed.
■
The system will operate in single channel mode if the DIMM sockets are populated in one
channel only.
■
The system will operate in dual channel Asymmetrical mode if the total memory capacity of
the DIMMs in Channel A is not equal to the total memory capacity of the DIMMs in
Channel B.
■
The system will operate in a higher-performing dual channel Interleaved mode if the total
memory capacity of the DIMMs in Channel A is equal to the total memory capacity of the
DIMMs in Channel B. The technology and device width can vary between the channels. For
example, if Channel A is populated with two 256MB DIMMs and Channel B is populated
with one 512MB DIMM, the system will operate in Interleaved mode.
■
In any mode, the maximum operational speed is determined by the slowest DIMM in the
system.
Item
Description
Socket Color
1
DIMM socket XMM1, Channel A
Black
2
DIMM socket XMM2, Channel A
White
3
DIMM socket XMM3, Channel B
Black
4
DIMM socket XMM4, Channel B
White