Parallel ata cable connecter have 40 pins.
15
40 / 80
40
the regular ATX has a 20 pin power connector, while the enhanced ATX power connector has 24 pin power connector.
24 pins
7 pins
== == 24-pins
7 pins
7
BTX motherboards use a 24-pin power connector.
Parallel ATA connectors use a 40 pin female connector with one pin removed for keying.
SATA, or Serial ATA cables don't really use pins, they're more a slide contact but they are still referred to as pins. There are also 2 types of SATA cables, one for the Power and one for the Data. The data cable is a 7 pin and the power is 15 pin. Here's a URL to a site that shows the SATA power pinout. See related link for more information.
notebook IDE connector= 44-pins Desktop IDE connector= 40-pins
34 pins in a FDD cable connector.
The P1 power connector is the first ATX power supplies and motherboards used a single power connector. It also has 20 pins.