NEC POWERMATE 5100 - SERVICE, Руководство по обслуживанию

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System Board 4-9
11.
Replace the system unit cover. Connect system power cables and external
options.
12.
Power on the system and press F2 to open the BIOS Setup utility before
POST. Set the BIOS settings (see Section 2).
Upgrade Sockets
The system board has the following sockets:
„
processor socket
„
DIMM sockets.
See the following paragraphs for socket descriptions.
Processor Socket
The processor socket is designed for easy processor replacement through use of
a Single Edge Contact (S.E.C.) cartridge. The cartridge contains the processor,
second level cache (Pentium II systems only), thermal plate, and back cover. In
addition, a heatsink is connected to the cartridge.
The 242-pin edge connector socket (Slot 1) on the system board holds the
processor S.E.C. cartridge. The cartridge is held in place in the socket by a
retention mechanism. With the cartridge plugged into the socket, the processor’s
pins automatically set the system board voltage regulator and processor speed.
To remove or install a processor S.E.C. cartridge, see Section 3, “Disassembly
and Reassembly.” Pin assignments for the processor socket are included at the
end of this section.
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 66-MHz memory configurations.
The DIMM modules
„
can be installed in one or both sockets
„
size can vary between sockets
„
speed must match the processor bus speed (66 MHz)
„
can be single- and double-sided.
!
CAUTION
ECC DIMMs are not supported and may interfere with
normal operation if installed.