User`s guide

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2: System Setup
Cards that support only 33Mhz bus speed will cause the PCI bus to lock to 33Mhz. This
can degrade performance of networking and storage cards that support 66Mhz bus
speeds or higher.
General Guidelines for Card Placement
In the section “Recommended Card Layouts” on page 25, specific card layouts are
recommended. Some optional/alternative configuration recommendations are also
made. The following is a list of general guidelines for card placement on an
SGI Media Server:
• Do not use cards of different types on the same bus. However, in fully configured
systems this may not be possible.
• PCI-VIDAUD-MSB-B boards are always to be put in the specific slots shown in
section “Recommended Card Layouts” on page 25.
• Never mix a PCI-VIDAUD-MSB-B card with networking or Fibre Channel/SCSI
disk HBA cards.
• PCI-VIDAUD-MSB-B cards may share the same bus with serial boards, if necessary.
• Serial boards may share the same bus with Gigabit Ethernet cards. However, there
will be some loss of networking performance.
• Keep disk and networking cards on separate buses. However, they can be put on
the same bus but there may be some overall degradation in both disk and network
performance.
1-Gigabit single-port FC HBA with PCI X X
2-Gigabit single-port FC HBA with PCI X X
2-Gigabit dual-port FC HBA with PCI or PCI-X X X
PCI-VIAUD-MSB-B card X
Serial I/O card X
Table 2-8 Supported Bus Speeds for Optimal Add-On Cards (continued)
Add-On Cards 33Mhz 66Mhz 100Mhz