Installation guide

11
Upgrading System Memory in Cisco 2600 Series Routers
78-5125-04 B0
Upgrading DRAM
Figure 7 SDRAM DIMM Locations in the Cisco 2691 Router
SDRAM DIMM Orientation
DIMMs are manufactured with polarization notches to ensure proper orientation and alignment holes to
ensure proper positioning. Figure 8 shows the polarization notches and alignment holes on a DIMM.
Caution To avoid damaging ESD-sensitive components, observe all ESD precautions. To avoid damaging the
system board, do not use excessive force when you remove or replace DIMMs.
72012
Slot 0
Slot 1
SDRAM DIMMs
Table 4 SDRAM Configurations for Cisco 2691 Routers
DIMM 0 DIMM 1 Total
64 MB DIMM — 64 MB
128 MB DIMM — 128 MB
64 MB DIMM 64 MB DIMM 128 MB
— 128 MB DIMM 128 MB
64 MB DIMM 128 MB DIMM 192 MB
128 MB DIMM 64 MB DIMM 192 MB
128 MB DIMM 128 MB DIMM 256 MB