NEC EXPRESS5800/120Ld, Руководство по обслуживанию, Страница: 25 / 194

System Overview 1-9
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 66 MHz PCI connector slots (Figure 1-6, A) that can
accommodate either a 32 or 64 bit PCI card and one 33 MHz PCI connector slot (Figure
1-6, B) that can accommodate either a 32 or 64 bit PCI card. The top two PCI connector
slots (PCI 1 and PCI 2) support bus speeds up to 66 MHz. The third connector slot
(PCI 3) 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.
A
B
Figure 1-6. 64 Bit PCI Connector Slots