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 2-5 DIMM Socket Locations
Item | Description | Socket Color |
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1 | DIMM socket XMM1, Channel A | Black |
| (populate first) |
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2 | DIMM socket XMM2, Channel A | White |
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3 | DIMM socket XMM3, Channel B | Black |
| (populate second) |
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4 | DIMM socket XMM4, Channel B | White |
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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. For example, if you are populating the sockets with one 1GB DIMM, two 512MB DIMMs, and one 256MB DIMM,
ENWW | Installing Additional Memory 13 |