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Oracle® Server X6-2L Service Manual

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Updated: January 2018
 
 

Populating DIMMs in Dual-Processor Systems for Optimal System Performance

In dual-processor systems, populate DIMMs into DIMM sockets starting with processor 0 (P0) D0, then, alternating between sockets associated with processor 0 (P0) and matching sockets for processor 1 (P1). Fill the black sockets, then the black sockets with white tabs, and finally, the white sockets, as shown in the following figure. Notice that the order of populating the black DIMM sockets is Ch C first, Ch A second, Ch D third, and Ch B last. Repeat the same population sequence for the black sockets with white tabs, and finally, for the white sockets.

Figure 5  DIMM Population Order for Dual-Processor Systems

image:Figure showing the DIMM population order for dual-processor                      systems.

The following table describes the proper order in which to install DIMMs in a dual-processor system using the numbered callouts in the above figure, the memory channel labels (Ch A through Ch D), and the DIMM socket labels (D0 through D11).

Table 9  DIMM Population Order for Dual-Processor Systems
Population Order
DIMM Sockets for Processor 0 (P0)
DIMM Sockets for Processor 1 (P1)
Memory Channels
Fill the black sockets first (alternating between processor 0 and processor 1)
First
Fill D0 first
Then fill D0
Ch C
Second
Fill D11 first
Then fill D11
Ch A
Third
Fill D3 first
Then fill D3
Ch D
Fourth
Fill D8 first
Then fill D8
Ch B
Then fill the black sockets with white tabs (alternating between processor 0 and processor 1)
Fifth
Fill D1 first
Then fill D1
Ch C
Sixth
Fill D10 first
Then fill D10
Ch A
Seventh
Fill D4 first
Then fill D4
Ch D
Eighth
Fill D7 first
Then fill D7
Ch B
Then fill the white sockets (alternating between processor 0 and processor 1)
Ninth
Fill D2 first
Then fill D2
Ch C
Tenth
Fill D9 first
Then fill D9
Ch A
Eleventh
Fill D5 first
Then fill D5
Ch D
Twelfth
Fill D6 first
Then fill D6
Ch B