User's Guide

1-10 System Overview
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 PCI and ISA expansion slots.
The system board has two full-length 66 MHz PCI connector slots (see A in figure
below) that can accommodate either a 32 or 64 bit PCI card and one full-length 33 MHz
PCI connector slot (see B in figure below) that can accommodate either a 32 or 64 bit
PCI card, as shown in the following figure. The top two PCI connector slots (PCI 1 and
PCI 2) support bus speeds up to 66 MHz. The third connector slot (PCI 3) only supports
a bus speed of up to 33 MHz.
Note:
The bus speed for the two 66 MHz PCI connector slots
(PCI 1 or PCI 2) is decreased to 33 MHz, if a PCI card is installed
into connector slot PCI 3 or if a 33 MHz PCI card is installed into any
one of the two 66 MHz PCI connector slots.
PCI features:
!
Bus speed up to 66 MHz (PCI 1 and PCI 2)
!
Bus speed up to 33 Mhz (PCI 3)
!
32-bit memory addressing
!
5 V/3.3 V signaling environment
!
Burst transfers up to a peak of 264 MB/s (64 bit, 33 MHz PCI) and 528 MB/s
(64 bit, 66 MHz PCI)
!
8-, 16-, 32-, or 64-bit data transfers
!
Plug and Play ready
!
Parity enabled.