System Board Set Features; Intel Xeon Processor; System Memory; I/O Expansion Slots - NEC Express5800 series User Manual

System Board Set Features

The following subsections provide a description of the system board set features.

Intel Xeon Processor

Depending on system configuration, your server includes one or two Intel Xeon
processors. Each Intel Xeon processor plugs into a ZIF (Zero Insertion Force) socket on
the system board. The processor includes a numeric coprocessor, a 512KB L3 cache or
1MB L3 cache, and operates at a bus speed of 400MHz. Up to four optional processors
enhance performance and enables symmetric multiprocessing (SMP).

System Memory

The memory board contains twelve 168-pin DIMM slots each supporting 72-bit ECC
(64-bit main memory plus ECC) registered PC-200 Double Data Rate (DDR) DIMMs.
Memory is partitioned in three banks. You may install a minimum of 512 MB
(128 MB x 4) or as much as 24 GB. The controller automatically detects, sizes, and
initializes the memory array, depending on the type, size, and speed of the installed
DIMMs, and reports memory size and allocation to the server via configuration
registers.
Note:
Call your customer service representative for information.

I/O Expansion Slots

The server's expansion capabilities meet the needs of file and application servers for
high performance I/O by providing a combination of 32-bit and 64-bit PCI expansion
slots.
The system board has four full-length hot-plug 64-bit, 100 MHz PCI-X connectors, two
non-hot-swap full-length 64-bit, 100 MHz PCI-X connector slots and two non-hot-swap
32-bit 33 MHz PCI connector slots. See Table 1-5.

Real-Time Clock/Calendar

The real-time clock provides system clock/calendar information stored in a non-volatile
memory (NVRAM). The real-time clock battery provides power backup for the real-
time clock.

BIOS

The BIOS and Setup Utility are located in the Flash EPROM on the system board and
include support for system setup and legacy device configuration. A number of security,
reliability, and management features also have been incorporated to meet vital server
needs.
Only use DIMMs approved for use in this server system.
System Overview 1-15