B-11
Cisco 2600 Series Routers Hardware Installation Guide
OL-2171-02
Appendix B Maintaining the Router
Upgrading DRAM
Figure B-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 B-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.
Table B-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
72012
Slot 0
Slot 1
SDRAM DIMMs
