Replacing Rsp7000 Dram Simms - Cisco 7000 Series Hardware Installation And Maintenance Manual

Note
Routers with 128 MB of DRAM will take longer to boot than those with 16 MB of DRAM.

Replacing RSP7000 DRAM SIMMs

The system DRAM resides on up to four SIMMs on the RSP7000. The DRAM SIMM sockets are
U4 and U12 for bank 0, and U18 and U25 for Bank 1. The default DRAM configuration is 16 MB
(two 8-MB SIMMs in bank 0). (See Figure 5-15.)
Note
in the following illustrations are generic representations of the actual DRAM SIMMs for your
RSP7000. To be sure that you are using the correct SIMMs, refer to the specific part or product
numbers indicated in the approved vendor list (AVL) and by your DRAM upgrade requirements.
This section describes the steps for increasing the amount of DRAM by replacing up to four SIMMs
that you obtain from an approved vendor.
Figure 5-15
The SIMM sockets use the thumb tabs that are often used in PCs and other computer equipment.
Each RSP7000 SIMM socket has two metal retaining springs, one at each end. (See Figure 5-16.)
When a SIMM is fully seated in the socket, the retaining springs snap over the ends of the SIMM to
lock it in the socket.
Before proceeding, ensure that you have the proper tools and ESD-prevention equipment available.
To upgrade DRAM, you install SIMMs in one or two banks. Table 5-10 lists the various
configurations of DRAM SIMMs that are available. Note which banks are used given the
combinations of available SIMM sizes and the maximum DRAM you require. SIMMs must be 60 ns
or faster and no taller than one inch.
The time required for the system to initialize varies with different router configurations.
The total number of memory devices per SIMM differs for each manufacturer. The SIMMs
RSP7000 DRAM SIMMs
Bus connector
DRAM
SIMMs
U1
Flash card
(PCMCIA) slot
Installing and Configuring Processor Modules
U24
U4
Bank 0
U12
U18
Bank 1
U25
Flash SIMM Auxiliary port
holder
CPU
ROM monitor
(boot ROM)
NVRAM
U17
Console port
Maintenance 5-43