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4-8 System Board
Upgrade Sockets
The system board has the following upgrade sockets:
processor socket
DIMM sockets.
See the following paragraphs for socket descriptions.
Processor Socket
The processor Slot 1 socket is designed for easy processor upgradeability
through use of a Single Edge Contact (S.E.C.) cartridge and a universal
retention mechanism. The cartridge contains the processor, second level cache,
thermal plate, back cover, and heatsink.
The 242-pin edge connector Slot 1 socket on the system board holds the
processor cartridge. The cartridge is held in place in the socket by the universal
retention mechanism.
To remove or install a processor cartridge, see Section 3, “Disassembly and
Reassembly.”
DIMM Sockets
The system board has two, 168-pin, gold-plated DIMM sockets (locations are
shown on the figure at the beginning of this section). The sockets support up to
256 MB of high-speed SDRAM memory. The sockets support DIMM modules
in 16-, 32-, 64-, and 128-MB unbuffered non-ECC memory configurations.
The DIMM modules
can be installed in one or two sockets
size can vary between sockets
speed must match the processor bus speed (66 MHz or 100 MHz)
can be single- and double-sided.
See the following tables for supported DIMMs and for sample DIMM upgrade
paths. To determine the memory needed for a memory upgrade, see “Checking
System Memory” in this section. To remove or install a DIMM, see Section 3,
“Disassembly and Reassembly.”