Cisco 3600 Series Configuration Note - Page 10

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Cisco 3600 Series Configuration Note
Upgrading DRAM
Figure 5
Only certain combinations of DRAM SIMMs are permitted. These combinations are shown in
Table 2 for 64-bit configurations, and in Table 3 for 32-bit configurations. (Memory configurations
that are too small to run the Cisco IOS software are not shown.)
Follow these rules to use 64-bit mode DRAM configuration:
•
•
•
Table 2
Bank 0
(SIMM 0)
(MB)
4
1
8
8 dual
8
8 dual
8
8
10 Cisco 3600 Series Memory Upgrade Configuration Note
Cisco 3640 DRAM SIMM Locations
The SIMMs in sockets 0 and 1 must be the same size (in MB) and have the same access time (in
nanoseconds).
The SIMMs in sockets 2 and 3 must be the same size and have the same access time.
The size of the SIMMs in sockets 2 and 3 must be less than or equal to the size of the SIMMs in
sockets 0 and 1.
Cisco 3640 64-Bit-Wide DRAM Configurations
Bank 1
Bank 2
(SIMM 1)
(SIMM 2)
(MB)
(MB)
4
4
8
–
2
8 dual
–
8
4
8 dual
4
8
8
8
8 dual
0
1
2
3
DRAM SIMMs
Bank 3
Total
(SIMM 3)
Memory
(MB)
(MB)
4
16
–
16
–
16
4
24
4
24
8
32
8 dual
32