Asus T3-P5G965A - Manual (Page 46)

4-6 Chapter 4: Motherboard Info
3. IDE connector (40-1 pin PRI_RAID)
This connector is for an 100/66 signal cable. Connect the blue
connector of the signal cable to this connector.
• Pin 20 on the IDE connector is removed to match the covered hole
on the Ultra DMA cable connector. This prevents incorrect insertion
when you connect the IDE cable.
• Use the 80-conductor IDE cable for Ultra DMA 100/66 IDE devices.
P5B13L
R
RAID Connector
NOTE: Orient the red markings
(usually zigzag) on the ID
ribbon cable to PIN 1.
PRI_RAID
PIN
1