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4
Group 0 of XDBus 1
8
0
0
Group 1 of XDBus 1
Figure E-4
The rules for adding memory devices are:
•
Always install eight SIMMs at a time.
•
First install all group 0 SIMMs on all system boards, from the lowest board
slot number to the highest.
•
Then, install group 1 SIMMs in the same order for the remaining SIMMs.
A minor exception to the above rule is that to optimize memory
performance, keep the numbers of memory groups balanced across
multiples of two or four boards. (This allows the system to interleave
memory across two or four boards.)
General Rules for System Configuration
SPARC
SPARC
module
module
A
SIMM sockets
5
4
5
0
9
1
0
0
0
0
0
0
4
4
4
4
4
6
5
7
0
0
0
0
0
0
0
0
SIMM Groups on the System Board
XDBus connector 1
B
XDBus connector 0
4
4
4
4
0
2
1
3
0
0
0
0
0
0
0
0
3
3
3
3
6
8
7
9
0
0
0
0
0
0
0
0
E
Group 0 of XDBus 0
Group 1 of XDBus 0
E-9
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