Intel BLKD915GAV Product Specification - Page 73
Add-in Card Connectors
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Technical Reference Table 32. ATX12V Power Connector Pin Signal Name 1 Ground 3 +12 V Pin Signal Name 2 Ground 4 +12 V Table 33. Alternate Power Connector Pin Signal Name 1 +12 V 2 Ground 3 Ground 4 +5 V 2.8.2.3 Add-in Card Connectors The board has the following add-in card connectors: • PCI Express x16: one connector supporting simultaneous transfer speeds up to 8 GBytes/sec. • PCI Express x1: the D915GAV board has two PCI Express x1 connectors; the D915GAG board has one PCI Express x1 connector. The x1 interfaces support simultaneous transfer speeds up to 500 MBytes/sec. • PCI Conventional (rev 2.2 compliant) bus: the D915GAV board has four PCI Conventional bus add-in card connectors; the D915GAG board has two PCI Conventional add-in card connectors. The SMBus is routed to PCI Conventional bus connector 2 only (ATX expansion slot 6). PCI Conventional bus add-in cards with SMBus support can access sensor data and other information residing on the Desktop Board. Note the following considerations for the PCI Conventional bus connectors: • All of the PCI Conventional bus connectors are bus master capable. • SMBus signals are routed to PCI Conventional bus connector 2. This enables PCI Conventional bus add-in boards with SMBus support to access sensor data on the boards. The specific SMBus signals are as follows: ⎯ The SMBus clock line is connected to pin A40. ⎯ The SMBus data line is connected to pin A41. NOTE The PCI Express x16 connector is configured to support only a PCI Express x1 link when the Intel GMA900 graphics controller is enabled. 73