Originally posted by orca:
And the major difference is that the 40/40 has 40 wires on the ribbon cable, and the 40/80 has 80 wires and they are thinner (smaller diameter) than 40/40. It actually feels stiffer than 40/40. in the 40/80 cable, only 40 wires carry signals, the other 40 cables in between are grounded so the signals doesn't get interference from each other.

So then 40/40 has 40 wires and 40 conductors, where as 40/80 has 40 wires and 80 conductors? That doesn't make sense.