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 2-7 DIMM Socket Locations
Table 2-1 DIMM Socket Locations
Item | Description | Socket Color |
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1 | XMM1 socket, Channel A (populate first) | Black |
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2 | XMM2 socket, Channel A (populate third) | White |
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3 | XMM3 socket, Channel B (populate second) | White |
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4 | XMM4 socket, Channel B (populate fourth) | White |
NOTE: A DIMM 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 wrong socket.
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
●The system will operate in flex 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. 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
ENWW | Installing Additional Memory 17 |