Populating Dimm Sockets - HP RP5 Retail System Hardware Reference Manual

Populating 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.
Figure 2-8
Table 2-1 DIMM Socket Locations
Item Description
1 XMM1 socket, Channel A (populate first)
2 XMM2 socket, Channel A (populate third)
3 XMM3 socket, Channel B (populate second)
4 XMM4 socket, Channel B (populate fourth)
The system will automatically operate in single channel mode, dual channel mode, or flex 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 a higher-performing dual channel 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 1-GB DIMMs and Channel B is populated with one 2-GB DIMM, the system
will operate in dual channel mode.
DIMM Socket Locations
Socket Color
Black
White
Black
White
Installing Additional Memory 13