Intel D875PBZ Specification Update page 20

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Intel Desktop Board D875PBZ Specification Update
2.8.2.1 Expansion Slots
The Desktop Board D875PBZ has the following expansion slots:
•
AGP connector: The AGP connector is keyed for Universal 0.8 V AGP 3.0
cards or 1.5 V AGP 2.0 cards only. Do not install a legacy 3.3 V AGP card.
The AGP connector is not mechanically compatible with legacy 3.3 V AGP
cards.
•
Five PCI rev 2.2 compliant local bus slots: The SMBus is routed to PCI bus
connector 2 only (ATX expansion slot 6). PCI add-in cards with SMBus
support can access sensor data and other information residing on the Desktop
Board D875PBZ.
NOTE
The SMBus routing to the PCI bus connectors does not conform to the PCI
Engineering Change Notice (ECN) "Addition of the SMBus to the PCI Connector
ECN", dated October 5th, 2000. The ECN specifies that SMBus signals must be
routed to all PCI bus connectors. On this board, SMBus signals are routed to
PCI bus connector 2 only.
Add-in cards that implement PCI bus connector pins A40 and A41 for any
purpose other than SMBCLK (SMBus clock) and SMBDAT (SMBus data) should
not be installed in PCI bus connector 2.
For information about
Addition of the SMBus to the PCI Connector ECN
NOTE
This document references back-panel slot numbering with respect to processor
location on the Desktop Board D875PBZ. The AGP slot is not numbered. PCI
slots are identified as PCI slot #x, starting with the slot closest to the processor.
Figure 19 on page 66 illustrates the Desktop Board D875PBZ's PCI slot
numbering.
4. Clarification of DDR Voltage
Section 1.6.1 will change as follows:
14
Refer to
http://www.pcisig.com/data/specificati
ons/smb_ecn_040501.pdf