Populating Dimm Sockets - HP Pro 3330 Microtower Maintenance & Service Manual

Populating DIMM Sockets

There are two DIMM sockets on the system board, with one socket per channel.
Populate the DIMM sockets in the following order: XMM1, then XMM3.
Figure 8-5
Table 8-1 DIMM Socket Locations
Description
XMM1 socket, Channel A
(populate first)
XMM3 socket, Channel B
NOTE: A DIMM must occupy the XMM1 socket.
●
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 DIMM in Channel A is equal to the total memory capacity of the DIMM in Channel B. The
technology and device width can vary between the channels. For example, if Channel A is
populated with one 2-GB DIMMs and Channel B is populated with one 2-GB DIMM, the system
will operate in dual channel mode.
●
The system will operate in flex mode if the total memory capacity of the DIMM in Channel A is
not equal to the total memory capacity of the DIMM 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. For optimal speed, the channels
should be balanced so that the largest amount of memory is spread between the two channels.
If one channel will have more memory than the other, the larger amount should be assigned to
Channel A. For example, if you are populating the sockets with one 2-GB DIMM, and one 1-GB
DIMMs, Channel A should be populated with the 2-GB DIMM, and Channel B should be
106 Chapter 8 Removal and Replacement Procedures – Small Form Factor (SFF) Chassis
DIMM Socket Locations
Socket Color
Black
Black
Insertion Order
1
2