Pentium Iii Processor; System Memory; I/O Expansion Slots - NEC EXPRESS5800/120Rc-2 Service Manual

Pentium III Processor

Depending on system configuration, your server includes one or two Pentium III
processors. Each Pentium III plugs into a ZIF (Zero Insertion Force) socket on the
system board. The processor includes a numeric coprocessor, a 256KB L2 cache and
operates at a bus speed of 133MHz. The optional second Pentium III processor
enhances performance and enables symmetric multiprocessing (SMP).

System Memory

The system board contains four 168-pin DIMM sockets. Memory is partitioned as four
banks of SDRAM registered DIMMs (PC133 compatible), each providing 72 bits of
noninterleaved memory (64-bit main memory plus ECC). Your system may include
from 64 MB to 4 GB of memory, using up to four DIMMs.
System memory begins at address 0 and is continuous (flat addressing) up to the
maximum amount of DRAM installed (exception: system memory is noncontiguous in
the ranges defined as memory holes using configuration registers). The system
supports both base (conventional) and extended memory.

I/O Expansion Slots

Your server's expansion capabilities meet the needs of file and application servers for
high performance I/O by providing a combination of PCI expansion slots.
The I/O expansion slots in your server are located on the system PCI I/O riser board
that plugs into a designated slot on the system board. See Figure 1-3, H. The I/O riser
board has three 33 MHz PCI connector slots (Figure 1-4) that accommodate 64 bit PCI
option cards and one 33 MHz PCI connector slot (Figure 1-4, B) that accommodates a
32 bit PCI option card.
PCI features:
Bus speed up to 33 MHz (PCI 1, PCI 2, PCI 3, and PCI 4)
!
64-bit memory addressing (PCI 1, PCI 2, and PCI 3)
!
32-bit memory addressing (PCI 4)
!
5 V/3.3 V signaling environment
!
Burst transfers up to a peak of 264 MB/s (64 bit, 33 MHz PCI)
!
8-, 16-, 32-, or 64-bit data transfers
!
Plug and Play ready
!
Parity enabled.
!
1-8 System Overview