They are not but good motherboards have different color connectors also they are preshaped in the certain way. It is done to avoid incorrect connections. Each connector can go only in its place.
The most common power supply connectors for motherboards will be either a 20 or 24 pin connector. Older unit used less pins like the ATX but the cure standard is the 20 or 24 pin main connector.
To supply power to Fans, Drives, Motherboards, processors, Ram.
They are P8 and P9 They are P8 and P9
No because they have different connectors.
SATA is designed to power hard drives and CD/DVD devices, ATX is designed for motherboards.
Power supply is dictated by your motherboard, simply get the power supply which matches the motherboards pin configuration.
Molex and Sata
You can get a power supply tester on ebay for $5. It will test all the connectors.
There is no such thing as PCI power supply. Case power supply can supply power to your PCI-E ports by means of 4, 6 and 8 pin connectors. It's especially true for new cards where PCI-E power is required to operate. Anyway, there are couple ways to test pins. One of them is to buy computer power supply tester. Second is cheaper is you have multimeter... You can test each pair of pins, required voltage is standardized and can be found in internet.
The main power connector 20-24pin. One for the CPU 4-8 pin. PCI express 4 pin. It's depend on what type of motherboard do you have. But commonly, new motherboards uses 2 power cord P8 and P9.
If it as a 20 or 24 pin connector and a 4 pin connector then it is a ATX power supply.
systems that have the standard ATX motherboards.