Dimm Sockets - HP Compaq dc7100 DT Hardware Reference Manual

Hardware Upgrades

DIMM Sockets

2–12
Refer to the Computer Setup (F10) Utility Guide on the
Documentation CD for information on how to determine the
processor bus frequency of a specific 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.
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The system will operate in a single channel mode if the DIMM
sockets are populated in one channel only.
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The system will operate in dual channel Asymmetric mode if the
total memory capacity of the DIMMs in Channel A is not equal to
the total memory capacity of DIMMs in Channel B.
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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. However, the technology and device width can vary
between the channels. For example, if Channel A is populated
with one 512-MB DIMM and Channel B is populated with two
256-MB DIMMs, the system will operate in Interleaved mode.
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In any mode, the maximum operating speed will be determined
by the slowest DIMM in the system. For example, if the system is
populated with a 333-MHz DIMM and a 400-MHz DIMM, the
system will run at only 333 MHz. For maximum performance
improvement, install identical high-performance DIMMs.
There are three DIMM sockets on the system board, with one socket
in memory Channel A and two sockets in memory Channel B. The
sockets are labeled XMM1, XMM3, and XMM4. Socket XMM1
operates in memory Channel A; sockets XMM3 and XMM4 operate
in memory Channel B.
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