HP dc5800 manual Populating Dimm Sockets, 1DIMM Socket Locations

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 2-9DIMM Socket Locations

Table 2-1DIMM Socket Locations

Item	Description	Socket Color
1	DIMM socket XMM1, Channel A	Black
	(populate first)
2	DIMM socket XMM2, Channel A	White
3	DIMM socket XMM3, Channel B	Black
	(populate second)
4	DIMM socket XMM4, Channel B	White

NOTE: A DIMM must occupy the XMM1 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 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 512MB DIMMs and Channel B is populated with one 1GB DIMM, the system will operate in dual channel mode.

●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

18 Chapter 2 Hardware Upgrades ENWW