If Cables are Ultra ATA they will work with ATA66, ATA100, and ATA133.
These Cables should have 80 wires. 40 of the cables are for data and the 40
in-between are suppose to separate and protect the data. How well rounded
cables work is questionable. I would guess these companies test them for
some quality. Even with 80 wire cables you often have to bend them to get
them to work and go to the desired point. In this sense the shorter the
wires the better the data transfer. 18 inches is suppose to be the maximum
length. I know they make them longer, and I have some that are longer.
They make them in 24 and 36 inch lengths, but shorter cables are
recommended. If you can keep the Hard Drive Cables to 18 inches that would
be a good idea.