24-Inch Ultra ATA 33 / 66 / 100 / 133 IDE Round Cable - Clear
Three connectors for up to two devices. It has 80 wires but 39 pins (one blocked), which makes it backward compatible. Yes, that means this cable will work with an old ATA33 hard drive/motherboard/CD ROM. Check the IDE connector on your motherboards. Ensure that it has 39 pins instead of 40. If it has 40. This rounded cable may or may not work with your motherboard. The connectors are color-coded for ATA133. The blue connector is for the motherboard. The middle, grey one must be connected to the master hard drive. The black, end one is for a slave drive if there is on.