Asus Rampage II Extreme - Manual (Page 58)

2.7.2 Internal connectors
1. Floppy disk drive connector (34-1 pin FLOPPY)
This connector is for the provided floppy disk drive (FDD) signal cable. Insert
one end of the cable to this connector, then connect the other end to the
signal connector at the back of the floppy disk drive.
Pin 5 on the connector is removed to prevent incorrect cable connection when
using a FDD cable with a covered Pin 5.
The floppy disk drive cable is purchased separately.
2-30 Chapter 2: Hardware information