Asus A7V8X-X A7V8X-X User Manual - Page 26

3. IDE connectors (40-1 pin PRI_IDE, SEC_IDE) This connector supports the provided UltraDMA/133/100/66 IDE hard disk ribbon cable. Connect the cable's blue connector to the primary (recommended) or secondary IDE connector, then connect the gray connector to the UltraDMA/133/100/66 slave device (hard disk drive) and the black connector to the UltraDMA/133/100/66 master device. It is recommended that you connect non-UltraDMA/133/100/66 devices to the secondary IDE connector. If you install two hard disks, you must configure the second drive as a slave device by setting its jumper accordingly. Refer to the hard disk documentation for the jumper settings. BIOS supports specific device bootup. If you have more than two UltraDMA/133/100/66 devices, purchase another UltraDMA/133/100/66 cable. You may configure two hard disks to be both master devices with two ribbon cables - one for the primary IDE connector and another for the secondary IDE connector. Pin 20 on each IDE connector is removed to match the covered hole on the UltraDMA cable connector. This prevents incorrect orientation when you connect the cables. For UltraDMA/133/100/66 IDE devices, use an 80-conductor IDE cable. NOTE: Orient the red markings (usually zigzag) on the IDE A7V8X-X ribbon cable to PIN 1. PRI_IDE SEC_IDE ® A7V8X-X IDE Connectors PIN 1 4. MDC header (10-1 pin MDC) This ASUS proprietary modem header accomodates an optional modem module. MODEM_IN AC97_SYNC AC97_SDIN1 GND AC97_BITCLK A7V8X-X 1-16 ® A7V8X-X MDC Header GND +3VSB AC97_RST# AC97_SDOUT MDC Chapter 1: Motherboard Information