4-6 System Board
Processor Socket
The processor installs in a 370-pin Socket 370 on the system board. The processor is held in
place in the socket by a locking lever attached to the socket and a removable retention clip. The
retention clip anchors both the processor and the processor heat sink to the Socket 370.
To remove or install a processor, see Section 3, “Disassembly and Reassembly.”
RIMM Sockets
Memory upgrades are installed into two memory module sockets on the system board. The
sockets support up to 512 MB of high-speed memory. The system supports 184-pin, 800-MHz
RDRAM modules in 64-, 128-, and 256-MB unbuffered memory configurations.
Use the following guidelines for selecting and installing RIMM modules:
! RIMM modules can be installed in one or two sockets
! if installing a RIMM module in only one socket, a continuity module must be installed in
the second socket
Ensure that both RIMM sockets are filled with two RIMM modules or
one RIMM module and one continuity module. If both sockets are not filled, system memory won’t
work well or at all.
! the size of the RIMMs can vary between sockets but the memory operates at the speed of
the slowest module
! for sample memory configurations, see the following table, “Sample RIMM Upgrade Paths”
! to determine the memory you need for a memory upgrade, see “Checking System Memory”
later in this section
! to locate memory module sockets on the system board, see the previous figure, “System
Board Upgrade Sockets.”
! to remove or install a RIMM module, see Section 3, “Disassembly and Reassembly.”

Sample RIMM Upgrade Paths

Total
Memory RIMM 1 RIMM 2
64 MB 64 MB Continuity Module
128 MB 64 MB 64 MB
128 MB 128 MB Continuity Module
256 MB 128 MB 128 MB
256 MB 256 MB Continuity Module
512 MB 256 MB 256 MB
The information in this table shows sample RIMM upgrade paths. It does
not represent every combination of RIMMs supported in the system.