You need an 80 wire flat Ultra ATA IDE ribbon cable. These differ from your normal IDE ribbon cables not only buy having twice the amount of wires but in the fact that they have different colored connectors on them. Blue, black and grey... or motherboard, master and slave drive connections. They are also higher priced... about 10 times the cost... but considering that an IDE cable is about 50c, I wouldn't worry too much about cost.