Intel DZ77RE-75K Technical Product Specification - Page 56
Add-in Card Connectors
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Intel Desktop Board DZ77RE-75K Technical Product Specification Table 24. Alternate Power LED Header Pin Signal Name 1 MAIN_COLOR_LED 2 KEY (no pin 3 ALT_COLOR_LED 2.2.2.2 Add-in Card Connectors The board has the following add-in card connectors: • Two PCI Express x16 (3.0/2.x/1.x) • Three PCI Express x1 (2.x/1.x) • Two Conventional PCI (rev 2.3) Note the following considerations for the Conventional PCI bus connector: • The Conventional PCI bus connectors are bus master capable. • SMBus signals are routed to the Conventional PCI bus connectors. This enables Conventional PCI bus add-in boards with SMBus support to access sensor data on the desktop board. 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 PCI Express 3.0 is only supported by 3rd generation Intel Core processor family processors. 56